pls help reward brainleist
Answer:
number 1: {0,-6) number 2: f(-2)=25 number 3: x=±10 number 4:B, or x=-2, x=3
number 5:36 i really hope this helps! have a good day!
Step-by-step explanation:
1: 2x^2+12x +0=0
this is how you set it up
next, you have to find the a,b,and c. This is my personal favorite way of doing this.
a=2 b=12, c=0
you plug it in to the quadratic formula which is
-b±√b^2-4ac/2a
(-12)±√(12)^2-4(2)(0)/2(2)
next you have to simplify
-12±√144-0/4
take the square root of 144
-12±12/4-
then, find the solutions of them
-12+12=0
0/4=0
x=0
we are not done yet
-12-12=-24
-24/4
x=-6
your solutions are 0,-6, which is C
2: it is giving us x, which is -2
plug in -2 to the right side of the equation.
2(-2)^2-4(-2)+9
2(4)-8+9
8-8+9
f(-2)=9
3: this one is fairly simple
x^2=100
take the square root of each side
x=±10
4: you have to replace y for 0 in this one
x^2-x-6=0
all you have to do is factor it out, and it turns into
(x+2)(x-3)
then turn these so they equal 0
x+2=0, x-3=0
x=-2 x=3
your answer would be B
5: this one is fairly simple too
the formula to completing the square is (b/2)^2
you plug in b, which is 12
12/2=6
6^2=36
you would add 36 to each side.
Answer:
7) {0, -6}
1) 25
2) x= ±10
3) x= 3, -2
4) 36
5) 225/4
6) x = -3±[tex]2\sqrt{3}[/tex]
Step-by-step explanation:
1) 2x^2 -4x + 9
2(-2)^2 - 4(-2) + 9
8+ 8 + 9
25
Many large cities use taxes on entertainment tickets to pay for improvements to public facilities, like stadiums, arenas, and concert venues. A city council proposal would increase the current ticket tax in order to raise funds for a new public concert hall. Council representatives plan to conduct a survey outside of a large concert in the summer and ask selected adults if they would support an increase in the ticket tax to pay for the new concert hall. Which type of bias will most likely affect the survey results? This is response bias because it is likely that many who respond will not provide a truthful opinion of the ticket tax. This is undercoverage bias because only those attending the concert will have an opportunity to register an opinion. This is nonresponse bias because many who are asked about the ticket tax may choose to not provide a response. This is voluntary response bias because many vocal supporters of the ticket tax may demand to register their opinion.
Answer:
This is undercoverage bias because only those attending the concert will have an opportunity to register an opinion.
Step-by-step explanation:
Undercoverage bias occurs when the sample chosen for a research is not representative of the entire population. Most times when research involving surveys to obtain the opinions of people on a subject matter, the entire population affected by the issue cannot be surveyed. A sample that represents the true population can be used for this research.
In the survey above, the sample that was surveyed was not representative of the entire population of citizens paying taxes on entertainment tickets. The selection process does not represent the true population.
Answer:
b on ed
Step-by-step explanation:
right
A missing piece of a board game, a circular disk, had an area of 100,608.7, the replacement disks are listed using circumferences, what size circumference should be ordered 1. 1,124.12 mm 2. 0.7 mm 3. 179 mm 4. 1,263,645.774 mm
Answer:
1,124.12 mm
Step-by-step explanation:
Steps to answering this question :
First determine the radius of the circle from the area of the circle
Use the radius determined above to calculate the circumference
Area of a circle = nr²
where r = radius
n = pi = 3.14
100,608.7mm = nr²
to determine the radius, divide both sides of the equation by 3.14
32,040.98726mm = r²
Find the square root of 32,040.98726mm
√32,040.98726mm
r = 179mm
Circumference of a circle = 2nr
2 x 179 x 3.14 = 1,124.12 mm
please help me with my math work, i included the picture so its easier for you
which expression is equivalent to 2 3/5 divided by 7/9
Answer:
I don't know look it up lol
Step-by-step explanation:
that's what I did go to answers. com that's where I get all my answers that brainly doesn't provide that or ask a tutor
May someone help me out with these problems? Please explain
Answer:
Well you have to solve each problem first to make them the same. Let's do decimals.
a) The square root of 58 is 7.61577310586. Let's round that to 7.62. You can solve this with a calculator.
b) Simply -32.0, since it is a whole negative number.
c) I think there's a typo, 'C' is the second 'b)', which is 49/7. 49 divided by 7 is seven, hence the decimal would be 7.0
d) 2.65 repeated, already a decimal, does not need changed.
e) The square root of 6 is 2.44948974278. Let's round that to 2.45.
f) is just 0. no decimal, just 0.
Now that you have these as the same form of number, you have to put them into one of these categories. The categories can be found below.
Any square root number is irrational. Any never ending number is irrational, like pi, but there are none of those in this situation. So a, and e are all irrational.
Any repeated number, in this case, 2.65 repeated, is a rational number, as is any decimal or fraction, but there are none of these, so d is rational.
-32 is and integer, because it is a negative whole number, so b is an integer.
Whole numbers are any numbers 0+. So f is the only answer that is a whole number.
Natural numbers are any numbers 1+. So c or the second b is a natural number.
Hope this helps :)
Stay Cold,
Brook
12. There are multiple correct answers. Be sure to show all your work. A team of students have built a water
powered rocket for chemistry class. Their challenge is to hit a target on the ground that is 300 feet away. They
have built a rocket that maintains a straight flight at a speed of 60 miles per hour. Once the propulsion stops, the
rocket will descend at a 67-degree angle and a speed of 15 miles per hour.
What angle should the rocket be launched at to hit the target?
How far will the rocket travel through the air?
How much time will the rocket spend in the air?
Answer:
1 560 000 miles / hr
Step-by-step explanation:
Find the surface area of the solid below.
sally’s huge dog weighed 175 pounds in 2018 and then weighed 145 pounds in 2020 what is the rate of change and weight?
Answer:17.14%
Step-by-step explanation:
145 x
_____=_____
175 100
145(100)=175(x)
14500=175x
__________
175 175
x=82.86
100-82.86=17.14%
Which expression is equivalent to 16a − 4b?
1.2(8a + 4b)
2.2(8a + 8b)
3.4(8a − 8b)
4.4(5a − 2b)
5.4(4a − b)
Answer:
5. 4(4a-b)
Step-by-step explanation:
i hope this helps :)
Grace cut 3 pieces of ribbon; each piece was 25 of a foot long. How many feet of ribbon does she have in all? Express your answer as a mixed number (the sum of a whole number and the remaining fractional units). Draw a number line to represent the problem.
Answer:
one piece = 1/3
Step-by-step explanation:
Answer:
she has 75 feet of ribbon, this number cant be expressed as a mixed number
Step-by-step explanation:
Please help answer correctly !!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!
Answer:
EG is perpendicular to HF
Step-by-step explanation:
We know this because in order for two segments to be perpendicular there has to be a right angle. And there is a right angle therefore segment EG is perpendicular to segment HF
Answer:F is perpindicular to G
Step-by-step explanation: Well I think this because they both have angles but im kinda confused to this is just a guess
i dnt understand this
Answer:
3017.54
Step-by-step explanation:
3.14 x radius(squared)
31 squared =961
3.14 x 961=
Which expressions are solutions to the equation 3/4x = 15? Select all that apply.
(answers are in the picture)
Answer:
ez
Step-by-step explanation:
The solution is, A. & E. x=15/3/4.
What is equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign. In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For instance, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.
here, we have,
given that,
3/4x = 15
x= 15÷3/4
x=15/3/4
Hence, The solution is, A. & E. x=15/3/4.
To learn more on equation click:
brainly.com/question/24169758
#SPJ5
A triangle has a base of 12 feet and a height of 8 feet. By how much does the height need to increase for the area to increase by 4.5 square feet?
Answer:
hello gimme-Dem points.
Step-by-step explanation:
Suppose you make coffee and it starts off just too hot to drink, so you put it in the refrigerator temporarily to cool it off. If the original temperature is 190 degrees Fahrenheit and the refrigerator is 36 degrees Fahrenheit, what will the temperature of the coffee be after 3 minutes? (k = 0.12)
Answer:
Step-by-step explanation:
f(x)= 36( 1 - 0.12)^x. F(x)= 36(0.88)^3. f(x)= 95.04 190-95.05 = 94.95 degree.
Because the temperature is going down, we will use (1-0.12) instead of (1+0.12). X=3 because it is what temperature after 3 min. x= time.
I don't understand the question that well, but please don't report me. I will fix it if I can.
-6x -6y = 66
2x + 4y = -32
Answer:
(23/2, 1/2)
Step-by-step explanation:
Let's solve this system through elimination by addition/subtraction:
Divide all three terms of the first equation by 3. This results in the equivalent system
-2x - 2y = 33
2x + 4y = -32
Combining like terms results in:
2y = 1, and so y = 1/2.
Let's use the first equation and y = 1/2 to find x:
-6x - 6(1/2) = 66
This becomes -6x - 3 = 66, or -6x = 69, or x = -69/6 , or x = 23/2
The solution is thus (23/2, 1/2)
-
Find the slope for the trend using points (2,2) and (4,3)
Answer:
Step-by-step explanation:
m = 1 / 2 = 0.5
Let f(x) = 2/x and g(x) = 2/x what is (g o f)(x)?
Answer:
(g o f)(x) = x
Step-by-step explanation:
Given the functions f(x) = 2/x and g(x) = 2/x
(g o f)(x) = g(f(x))
g(f(x)) = g(2/x)
Replace x with 2/x in g(x)
g(f(x)) = 2/(2/x)
g(f(x)) = 2 * x/2
g(f(x)) = 2x/2
g(f(x)) = x
Hence the composite function g o f)(x) is x
HELPHELPHELPHELPHELPHELPHELP
yes since you multiply the x number by 3 to get y
Name the variables: 23xy - 4
Answer:
x, y
Step-by-step explanation:
I need this done fast, it's due today!
Answer:
(0, 50) (25, 57.5) (50, 122.5) (75, 195) (100, 275)
Step-by-step explanation:
We know that he earns 30% percent of the money made on sales, plus $50 a week. We know that he starts off with 50, because that's how much he made by working that week. To figure out how much money he made off of each one, we have to calculate 30% of the sale, and add that to the total amount of money he has made up to that point. I hope this helps :)
Answer:
y=50x(.3)+30
Step-by-step explanation:
You get an average of $50 per week and then work 30 hours per week but the outcome is multiplied by .30 from the sales commision so the answer would be y=50x(.3)+30
Jamal has 30 ounces of a 20% saline solution. This means 20% of the solution is salt. He combines this solution with 25 ounces of a
30% saline solution
What is the total amount, in ounces, of salt in the combined moxture?
Answer:
12.5
Step-by-step explanation: add the formula
The radius of a circle is 7 kilometers. What is the diameter?
Answer:
14kilometers
Step-by-step explanation:
diameter=2*radius.
20 POINTS FOR THIS GUYS
Answer:
Slope is 5
Y-intercept is 35
5. A dining room chair has four legs.
You begin placing chairs around a
table that seats five people.
Answer:
20
I assume the question asks how many chair legs there are in total.
If a chair has four legs and you have five chairs, you would multiply 5 times 4.
5 times 4 = 20
The volume of the figure below is 120 cubic inches. Solve for x
Answer:
Step-by-step explanation:
Volume of triangular prism=120in³
Area of triangle ×length =120in³
1/2×6×x×4=120in³
12x=120
X=120/12=10in
what is the value of the 4 in the number 5,942
Answer:
tenths
Step-by-step explanation:
solve the equation (x-4)(2x+3) = 4
Answer:
(x-4.34)(x+1.84)=0
Step-by-step explanation:
2x^2 -5x-16=0
delta=
[tex]25 + 4 \times 2 \times 16 = 153[/tex]
x1,2=
[tex](5 + \sqrt{153} ) \div 4 = 4.34 \\ (5 - \sqrt{153} ) \div 4 = - 1 .84[/tex]
A storekeeper increased the price of hats by 5%. Write an equation to calculate the increase of the total cost, c, when the price of a hat is p dollars.
Answer:
c = 1.05p
Step-by-step explanation:
the price of the hat before the increase was 100%, after the increase it becomes 100 + 5% = 105%. Representing it as a decimal becomes 1.05p
Let illustrate with an example.
The price of a hat was $100, after the 5% increase. the cost of the hat becomes
100 + (0.05 x 100) = 105
To find the percentage increase
divide 105 by 100 and subtract 1
(105/100) - 1 = 1.05