Answer:
Here's what I get
Step-by-step explanation:
1. Wavelengths
[tex]\begin{array}{lcc}\textbf{Salt} & \textbf{Flame Colour} & \mathbf{\lambda} \textbf{/nm}\\\text{KCl} & \text{violet} & 423\\\text{LiCl} & \text{red} & 701\\\text{CuCl}_{2} & \text{blue-green} & 492\\\text{NaCl} & \text{ orange-yellow} & 590\\\end{array}[/tex]
2. Identity of unknown
Don't know. You haven't told us its flame colour.
3. Light filters
You could probably filter lithium light. It is almost pure red.
The other elements emit light of mixed colours. It would be difficult to filter them with filters of a single wavelength.
4. Fireworks chemicals
For a red explosion followed by a green one, the engineer should use LiCl and CuCl₂.
A car begins to depreciate at a rate of 24.9% annually as soon as it is driven off the lot. If a car was purchased for 26,500; how much is it worth after the second year? The equation you used is? What is the value of the car after two years?
Answer:
13197
Step-by-step explanation:
You have to do 24.9*2 and then find that percent of 26500
pllllllllzzzzzzz answer this!!!♥️♥️
9514 1404 393
Answer:
a) 7:24 pm
b) later than 7:24 pm
Step-by-step explanation:
The relationship between time, speed, and distance can be written as ...
time = distance/speed
So, Faris's travel time to London is predicted to be ...
time = (195 mi)/(50 mi/h) = 3.9 h = 3:54 hours
__
a) Faris's expected arrival time at a speed of 50 mph is ...
3:30 pm +3:54 = 6:84 pm = 7:24 pm
__
b) Time is inversely proportional to speed, so a lower speed will result in a longer time.
Faris's arrival time will be later than 7:24 pm.
Determine the value of x. answers: 1) 116° 2) 122° 3) 58° 4) 238°
Answer:
B) 122
Step-by-step explanation:
This is because x will equal 180 - 58
Answer:122
Step-by-step explanation:
PLEASE HELP I AM GIVING 15 POINTS INSTEAD OF FIVE FOR ANSWERING PLEASSSEEE HEEEEELLLP
Answer:
Third Choice:
[tex] x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a} [/tex]
Step-by-step explanation:
One line has
[tex] x + \dfrac{b}{2a} = \pm \dfrac{\sqrt{b^2 - 4ac}}{2a} [/tex]
The next line's reason is that b/2a was subtracted from both sides.
The missing line is:
[tex] x = -\dfrac{b}{2a} \pm \dfrac{\sqrt{b^2 - 4ac}}{2a} [/tex]
Then it simplifies to
[tex]x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}[/tex]
Consider functions f and g below. [tex]g(x) = -x^2 + 2x + 4[/tex] Which of the following statements is true? A. As x approaches infinity, the values of f(x) and g(x) both approach infinity. B. As x approaches infinity, the values of f(x) and g(x) both approach negative infinity. C. As x approaches infinity, the value of f(x) approaches infinity and the value of g(x) approaches negative infinity. D. As x approaches infinity, the value of f(x) approaches negative infinity and the value of g(x) approaches infinity.
Answer:
Step-by-step explanation:
Where is f(x)? My answers pertains only to g(x) = -x^2 + 2x + 4.
Part of B is true: As x approaches infinity in either direction, g(x) approaches negative infinity. The graph of g(x) is an inverted parabola.
A meeting is held with eight people around a circular table. Two of the participants, April and May, want to sit so that there is exactly one other person between them. How many different seatings are possible? (Two seatings are considered the same if one can be rotated to obtain the other.)
Answer:
6
Step-by-step explanation:
I = Person
April I May I I I I I
I April I May I I I I
I I April I May I I I
I I I April I May I I
I I I I April I May I
I I I I I April I May
Each situation will always have 1 person between them and there will always be 8 people.
Need Help Please I'm Out Of Time ;(
The mean age of Lincoln's tee-ball team is 5. Suppose one of his 7-year-old teammates quits the team, but a 6-year-old joins the team. Is the mean age of Lincoln's team still 5? Explain your reasoning.
Answer:
No
Step-by-step explanation:
Mean age = (the sum of the ages)/number of people
So, if 7 is replaced with 6 ,the sum will be different so the mean age will not be the same
Find the domain of the graphed function.
finding domain:
to find the domain, we are finding all of the x values.
example:
say we have the points: (2,5) (4,8) (1,7) (8,10) (13,2)
the domain would be a list of all of the x values of all of the coordinate points. therefore the domain would be:
domain:
{1,2,4,8,13}
conclusion:
since you have not attached the function or a graph, you will have to find the domain on your own (unless you attach one now). hope this helps!
I’ve done a I just need help with b and c
Answer:
A) x+y=10 & 2x+3y=24
B) x=6
C) Substituting 6 in for x in each of the equations and finding the y factor, we see that we have 6 bottles of soda and 4 bags of chips (10 items that equals 24 dollars)
Step-by-step explanation:
A) x+y=10
2x+3y=24
B) make x+y=10 into y=10-x
Substitute 10-x in for y into the 2nd equation.
2x+3(10-x)=24
2x+30-3x=24
-1x=24-30
-1x=-6
x=6
C) Substituting 6 in for x in each of the equations and finding the y factor, we see that we have 6 bottles of soda and 4 bags of chips (10 items that equals 24 dollars)
May i get an answer? for 10 points
Answer:
[tex]= 452.38 {cm}^{2} \\ \\ [/tex]
Step-by-step explanation:
[tex]area = 4\pi {r}^{2} \\ = 4 \times \pi \times 6 \times 6 \\ = 452.38 {cm}^{2}
[/tex]
Step-by-step explanation:
given,
radius = 6cm
area =4× pi ×r^2
so, area=4×22/7×6^2
therefore the area of sphere is 452.5714cm^2.
hope its what you are searching for..
Trying to find the missing segment to the triangle in the attached image. Any help would be appreciated. Thanks.
Answer:
24 unit
Step-by-step explanation:
This question can be solved using concept of basic proportionality theorem,
according to this theorem, if a line is drawn parallel to one side of the triangle and intersect the other two sides then the two sides are divided in the same ratio.
Example:
let there be a triangle ABC
if DE is drawn parallel to BC such that D is a point on line AB and E is other point on AC, then
AD/DB = AE/EC (basic proportionality theorem)
_____________________________________
Similarly in this problem
15/5 = ?/8
3= ?/8
? = 8*3 = 24
Thus. missing segment value is 24 unit.
SOMEONE PLEASE HELP!!! in the graph below, find the coordinate of the image point. O is the origin and P is the point (4,3). Ry and Rx are reflections around the x- and y-axes. R p,90 o R o,-90 : (-1,-1)
•(-7,9)
•(-1,-1)
•(6,-2)
Answer:
C.) (6, -2)
Hope this help!
Answer:c(6,-2)vis your answer
Step-by-step explanation: The guy above me is right
Carol is cross-country skiing. The table shows the distance she traveled after various numbers of minutes. What is the rate of change? Distance Carol Traveled while Cross-Country Skiing Minutes Distance Traveled (miles) 2 StartFraction 1 Over 6 Endfraction 3 StartFraction 17 Over 48 EndFraction 4 StartFraction 13 Over 24 EndFraction 5 StartFraction 35 Over 48 EndFraction 6 StartFraction 11 Over 12 EndFraction StartFraction 1 Over 12 EndFraction StartFraction 1 Over 6 Endfraction StartFraction 3 Over 32 EndFraction StartFraction 3 Over 16 EndFraction
Answer:
3/16 miles/minute
Step-by-step explanation:
A rate of change describes how an output quantity changes relative to the change in the input quantity.
Points given:
Input Output
2 1/6
3 17/48
4 13/24
5 35/48
6 11/12
Here input values describe the time in minutes from 2 to 6 and output values describe the distance in miles from 1/6 to 11/12
Calculating the rate of change using the first two pairs of input-output values
Relative change = change in distance/change in time
(17/48 - 1/6)/(3-2) = (17/48 - 8/48) /1 = 9/48 = 3/16 miles/minute
We will get the same result if we take any other ordered pair of input and output values.
So D is your answer! Hope this helped!
Rate of change is the change in a particular variable, over another variable.
The rate of change is: 3/16 miles per minutes
To calculate the rate of change, we select any two points on the table (see attachment)
[tex](x_1,y_1) = (2,\frac 16)[/tex]
[tex](x_2,y_2) = (3,\frac{17}{48})[/tex]
The rate of change (m) is calculated as follows:
[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
So, we have:
[tex]m = \frac{\frac{17}{48} - \frac{1}{6}}{3-2}[/tex]
[tex]m = \frac{\frac{17}{48} - \frac{1}{6}}{1}[/tex]
[tex]m = \frac{17}{48} - \frac{1}{6}[/tex]
Take LCM
[tex]m = \frac{17- 8}{48}[/tex]
[tex]m = \frac{9}{48}[/tex]
Reduce fraction
[tex]m = \frac{3}{16}[/tex]
Hence, the rate of change is: 3/16 miles per minutes
Read more about rates of change at:
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Which set represents the domain of the function shown? (5 points)
{(−3, 6), (0, 2), (4, 7), (11, 15)}
{(6, −3), (2, 0), (7, 4), (15, 11)}
{2, 6, 7, 15}
{−3, 0, 4, 11}
Answer:
To make it simple, when finding the domain all you have to do is look for the x within the points.
Looking at the first set you can tell that the domain is -3, 0, 4, and 11
The y or the f(x) would be 6, 2, 7, and 15
(Just saying y and f(x) are the same thing.)
For the next set the domain is 6, 2, 7, and 15
For the f(x) it is -3, 0, 4, and 11
Remeber x and Domain is the same thing so all you have to do is look for the x within the points of the plot, as for looking for the range, it is the same thing as y or f(x).
God Bless
Hope that this helps!!!!!!!!!!!!!!
Answer:
D, -3,0,4,11
Step-by-step explanation:
A garden hose supplies 36 gallons of water in 3 minutes.Use a table of equivalent ratios to show the garden hose's water flow in gallon per minute and minutes
Answer:
Garden hose water flow in gallons per minute(x:y) = 12:1
Minutes per gallon water flow(y:x) = 1:12
Step-by-step explanation:
Complete question below
A garden hose supplies 36 gallons of water in 3 minutes. Use a table of equivalent ratios to show the garden hose's water flow in gallons per minute and minutes per gallon.
Let
the garden hose water flow=x
Time of glow=y
x:y=36 gallons : 3 minutes
x/y=36/3
x/y=12/1
x:y=12:1
Therefore, garden hose water flow in gallons per minute is given by
x:y = 12:1
Minutes per gallon water flow
y:x=3:36
y/x=3/36
y/x = 1/12
y:x = 1:12
Therefore, minutes per gallon water flow is given by
y:x = 1:12
Table of equivalent ratio for x:y
36:3
24:2
12:1
Table of equivalent ratio for y:x
3:36
2:24
1:12
9. Annie works as a school tutor and a baker. As a tutor, she earns $18 per hour. Last
week she worked x hours as a tutor and her friend paid her $25 to bake a cake.
Write an expression to represent the total amount Annie earned last week.
Type your answer below:
The total amount Annie earned last week 18x+25.
What is work in math ?In conclusion, when a force acts on an object to induce a displacement, labor is done.To determine the amount of work, three quantities must be known. The force, the displacement, and the angle between the force and the displacement are the three variables.Annie earns $18 per hour. and she worked x hours .
So, total work = 18 * x = 18x
but she earned some extra cash = 25$
now Annie's total amount with extra cash = 18x + 25
Therefore, The total amount Annie earned last week 18x+25.
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If abc=dec b=2x+31 and e=7x-24 x=?
Answer:
x = 11
Step-by-step explanation:
As it is stated the the both the triangle ABC and DEC are congruent, it means that all the angles forms in these triangles are also congruent. We can states that
<A = <D
<C = <C
<B = <E
As both angles B and E are equal to each other, we can equate them
<B = <E
Where <B = 2x+31 and <E= 7x-24, substitute both values in above expression:
2x + 31 = 7x - 24
Solve for x:
7x - 2x = 31 +24
5x = 55
x = 11
Answer:
11
Step-by-step explanation:
A geometric sequence of positive integers is formed for which the first term is 2 and the fifth term is 162. What is the sixth term of the sequence?
Answer:486
Step-by-step explanation:
(Multiply by 3 each time ;))
Hope this helped!
<!> Brainliest is appreciated! <!>
Answer:
multipl each 3 times
Step-by-step explanation:
PLLLLLLLLLLZZZZZZZZZ
Answer: 4m + 3
Step-by-step explanation:
4m references the 4 bags of marbles and the m marbles in each bag. + 3 references the extra 3 marbles.
Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.
Polygon ABCD is dilated by a certain scale factor with the origin as the center of dilation to form the image A'B'CD. The length of AB is
5.6 units, and the length of A' B' is 2.24 units.
The value of the scale factor is
Write your answer as a decimal number to two decimal places.
Answer:
2.5
Step-by-step explanation:
plato
The required value of the scale factor is 2.50 in the given dilation.
What is a scale image?Scale image is defined as a ratio that represents the relationship between the shape and size of a figure and the corresponding dimensions of the actual figure or object.
We have been given that a Polygon ABCD is dilated by a certain scale factor with the origin as the center of the dilation to form the image A'B'CD.
The length of AB = 5.6 units, and
The length of A' B' = 2.24 units.
We have to determine the value of the scale factor.
As we know scale factor is the ratio of sides in the original image and the image after dilation.
The scale factor = length of AB/length of A' B'
The scale factor = 5.6/2.24
The scale factor = 2.50
Therefore, the required value of the scale factor is 2.50.
Learn more about the Scale images here:
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A right cone has a radius of 13 cm and an altitude of 52 cm. Find its volume. Question 20 options: A) 9,486.0 cm3 B) 27,608.3 cm3 C) 28,458.0 cm3 D) 9,202.8 cm3
Answer:
D) 9,202.8
Step-by-step explanation:
The volume of a cone is [tex]\frac{\pi *r^{2} *h}{3}[/tex] so when you substitute the values you get the answer
Answer: A
Step-by-step explanation:
A boy is flying a kite. The vertical distance from the kite to the horizontal line containing the boy's hand is 68 ft. The horizontal
distance from the boy's hand to directly under the kite is 51 feet. How long is the string from the boy's hand to the kite. Round
your answer to the nearest foot, and enter the number only
Answer:
Assuming its a right triangle the distance is 85 ft.
Step-by-step explanation:
Need Help Please I'm Out Of Time ;(
Identify three temperatures that are colder than -5°C. Then, using complete sentences, explain how you know that they are colder.
Answer:
-7 , -9 and -10
Step-by-step explanation:
The main temperature is -5°C.
-5 is a negative number so a colder temperature will be a number that is less than -5
substracting this number from -5 will give us a positive number
-5-(-7)= 2-5-(-9)= 4 -5-(-10) = 5Given that m angle BAC=48^ and m angle BCA=19^ , find m angle ABD
Answer:
B. 67°
Step-by-step explanation:
Step 1: Find m∠B
180 - (48 + 19) = 113°
Step 2: Use Supplementary Angles rules
180 - 113 = 67°
Answer:
m<ABD is 113 degrees
Step-by-step explanation:
The interior angles of a triangle must add up to 180 degrees.
Representing angle ABD by x, we have:
x + 48 degrees + 19 degrees => x + 67 degrees = 180 degrees.
Subtracting 67 degrees from boths sides, we get x = 113 degrees.
m<ABD is 113 degrees.
MULTIPLE CHOICE
What is 14+2(3x +9) - 5 when simplified?
A
20x +4
B
6x+27
С
X+27
Answer:
B: 6x+27
Step-by-step explanation:
14+2(3x+9)-5
14+6x+18-5
14+6x+13
6x+27 is the final answer
The Answer is: B
Step-by-step explanation:
Gina is building a tent. The dimensions of the tent are shown in the diagram.
10 ft
12 ft
16 ft
10 ft
10 ft
8ft
The tent is made of fabric. How many square feet of fabric were used to make the tent?
448 square feet
512 square feet
560 square feet
608 square feet
Answer:
608 ft
Step-by-step explanation:
(2(0.5bh)) + 2bh + bh
Answer:
its D
Step-by-step explanation:
Classify the following triangle. Check all that apply.
450
11.3
-8
145
8
A. Obtuse
B. Right
O C. Isosceles
D. Acute
E. Scalene
O F. Equilateral
Answer:
B and C
Step-by-step explanation:
B. You can tell because of the right angle
C.It has two sides that are equal
The triangle is classified below.
B. Right
C. Isosceles
What is an isosceles triangle?In geometry, an isosceles triangle is a triangle that has two aspects of identical duration. Every so often it is specified as having exactly two facets of identical period, and once in a while as having at the least two aspects of equal duration, the latter version as a consequence consisting of the equilateral triangle as a special case.
What is a right triangle?A right triangle or right-angled triangle, or greater officially an orthogonal triangle, previously known as a rectangled triangle, is a triangle wherein one attitude is a right angle or two aspects are perpendicular.
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for each graph state whether it’s a function
Answer:
Graph 1, 4, 6 are functions.
Graph 2, 3, 5 are not functions.
Step-by-step explanation:
If graph of a relation pass the vertical line test, then we can say the relation is a function.
In vertical line test, we draw a vertical line parallel to axis, if graph of relation intersect the line almost once, then we say in is a function.
To check, whether the given relation is function or not, draw verticals lines on each graph as shown below.
In graph 1, open circle means the value x=-1 is not include it that.
From the below figure it is clear that:
Graph 1, 4, 6 pass the vertical line test, so they represent functions.
Graph 2, 3, 5 does not pass the vertical line test, so they are not functions.
PLEASE HELP WITH THIS(INORDER FOR ME TO GIVE YOU A BRIANLIST,YOU MUST SHOW A PICTURE AND EXPLAIN HOW U GOT IT)(will give brainlist and thanks)(Find the premeter)
Answer:
To find the perimeter of a shape we need to add its side lengths. Therefore the answer is 22.5 + 8 + 16 + 8 = 54.5 ft.
Find the missing side length in the attached image
Answer:
the answer is x = 14 because 9-2=7 ×2 = 14