Ive been looking at this for a long time please help.
Answer:
x = 2 and y = 7. This is 2 unknown and 2 equation...It's simply to combine. as below.
Step-by-step explanation:
-6x + 2y =2---> simplify like -3x + y = 1 then column add with -4x - y = -15---> so -7x = -14---->x = 2 and -4 (2) - y = -15 ---> -8 + 15 = y....so y = 7..
Answer is x = 2 and y = 7...
Copper costs £5 per kilogram.
Zinc costs £3.20 per kilogram.
Copper and zinc are mixed in the ratio 4:1 to make brass.
Work out the cost of 7 kilograms of brass
Answer:
4x(5)+1×(3.20)= 20+3.20=23.20
Step-by-step explanation:
The cost of 7kg of brass is £32.48.
What is ratio?
A ratio is a comparison of two or more numbers that indicates their sizes in relation to each other.
According to the given question.
Cost of one kg of copper = £5
Cost of one kg of zinc = £3.20
Also, copper and zinc are mixed in the ratio 4:1.
Let the quantity of copper be 4x and the quantity of zinc 1x.
Weight of brass = 7kg
⇒ 4x + 1x = 7
⇒ 5x = 7
⇒ x = [tex]\frac{7}{5}[/tex]
⇒ x = 1.4
Weight of copper, 4x = (1.4)(4) = 5.6kg
Weight of zinc, 1x = (1) ×(1.4) = 1.4kg
Therefore,
The cost of 7kg of brass
= (5.6)×(£5) + (1.4)(£3.20)
= 28 + 4.48
= £ 32.48
Therefore, the cost of 7kg of brass is £32.48
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Which two types of lines only meet inside the triangle?
Answer:
angle bisectors and opposite side perpendiculars
Step-by-step explanation:
which expression is equialent to 6(x+2y)+3+4y+5
Answer:
6x+8+16y
You just have to simplify it
15) Volume of a cuboid with base area 500 m2 and height 4m is. with steps
Answer:
Volume of cuboid = 2000 m³
Step-by-step explanation:
Given the following data;
Base area = 500 m²
Height = 4m
To find the volume of a cuboid;
The volume of a cuboid is given by the formula;
Volume of cuboid = length * breadth * height
But remember, base area = length * breadth
Therefore, the volume of the cuboid becomes;
Volume of cuboid = base area * height
Substituting into the equation, we have;
Volume of cuboid = 500 * 4
Volume of cuboid = 2000 m³
Bro pls help em bro pls help me bro
Answer:
Step-by-step explanation:
#2) Which of the following would be considered a financial advantage of renting a
house or apartment?
Renters receive no federal income tax benefits.
Renters do not have the maintenance costs associated with home ownership.
Renters do not build equity on the house they rent.
O None of the above
Renters do not have the maintenance costs associated with home ownership. Therefore, option B is the correct answer.
What is tax?In mathematics, the tax calculation is related to the selling price and income of taxpayers. It is a charge imposed by the government on the citizens for the collection of funds for public welfare and expenditure activities. There are two types of taxes: direct tax and indirect tax.
Both renting and buying have their financial advantages, and owning a home isn’t right for everyone.
Unlike homeowners, renters have no maintenance costs or repair bills and they don't have to pay property taxes.
Amenities that are generally free for renters aren't for homeowners, who have to pay for installation and maintenance.
Renters do not have the maintenance costs associated with home ownership.
Home owners have to pay for all costs & repairs needed.
Therefore, option B is the correct answer.
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Please help
Due today
Answer:
sorry I've confused myself now and I don't want to give you a wrong answer
Step-by-step explanation:
What is the volume of this triangular prism?
Answer:
972cm^3
Step-by-step explanation:
use the formula for a rectangular prism base x height x length but then divid by two because it is a triangular prism.
multiply 18 x 12 x 9 then divide by 2
Answer:
1944 cm
Step-by-step explanation:
Grace is going to invest in an account paying an interest rate of 3.8% compounded
continuously. How much would Grace need to invest, to the nearest cent, for the
value of the account to reach $46,000 in 13 years?
PLEASE HELP ME URGENT
Answer:
P≈28068.32
Step-by-step explanation:
Grace needs to invest, to the nearest cent, for the value of the account to reach $46,000 in 13 years is 27705.78944.
We have given that,
Grace is going to invest in an account paying an interest rate of 3.8% compounded continuously.
We have to determine how much would Grace need to invest, to the nearest cent, for the value of the account to reach $46,000 in 13 years.
What is the formula of a compounded continuously?
[tex]A=Pe^{rt}[/tex]
A=46000, t=13 ,r=0.038
[tex]Pe^{0.039\left(13\right)}=46000[/tex]
[tex]Pe^{0.039\left(13\right)}=46000[/tex]
[tex]\frac{Pe^{0.039\cdot \:13}}{e^{0.507}}=\frac{46000}{e^{0.507}}[/tex]
[tex]P=\frac{46000}{e^{0.507}}[/tex]
[tex]\quad P=27705.78944[/tex]
Therefore, Grace needs to invest, to the nearest cent, for the value of the account to reach $46,000 in 13 years is 27705.78944.
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PLEASE HELP!!!!!!!!! I NEED IT
The angle of elevation from a point on the ground to the top of a tower is 18°. The base of the tower is 100 feet from the point on the ground. Find the height of the tower. Round to the nearest tenth of a foot.
Answer:
32.5 feet
Step-by-step explanation:
This situation forms a right triangle. We are given the distance from the base of the tower (long leg of the triangle) and are asked to find the height (short leg of the triangle).
With this information, we can use the tan ratio, opposite over adjacent, to find the height of the tower.
tan 18 = [tex]\frac{x}{100}[/tex]
Multiply each side by 100:
(100) tan 18 = x
Simplify and round to the nearest tenth:
32.49 = x
32.5 = x
So, the height of the tower is approximately 32.5 feet
IN 2013 The number of students in a small school is 284. it is estimated that the student population will increase by 4% every year. write formula for student population and estimate student population in 2020
Answer:
Amount = Initial value × (1 + rate of interest)^years and 374
Step-by-step explanation:
The formula to determine the student population and the estimated student population is given below:
As we know that
Amount = Initial value × (1 + rate of interest)^years
= 284 × (1 + 0.04)^7
= 284 × 1.04^7
= 373.72
= 374
I NEED HELP PLEASE I WILL GIVE CROWN :))
Answer:
Its the second answer
Step-by-step explanation:
Sarah and Connor went bowling together. Sarah rented bowling
shoes and played three games, for a total cost of $9.50. Connor
rented bowling shoes and played five games, for a total cost of
$14.50.
How much does it cost to rent bowling shoes?
Answer: The cost to rent bowling shoes is $2.
Step-by-step explanation:
Let's define:
S = cost for renting bowling shoes.
G = cost per game.
Then if you rent shoes, and play x games, the total cost is:
C = S + x*G
We know that Sarah rented the shoes and she played 3 games, paying a total of $9.50, then:
C = $9.50 = S + 3*G
We also know that Connor rented the shoes and played 5 games, with a total cost of $14.50
C = $14.50 = S + 5*G
Then we have a system of equations.
$9.50 = S + 3*G
$14.50 = S + 5*G
To solve this, we first need to isolate one of the variables in one of the equations. I will isolate S in the first one:
S = $9.50 - 3*G
Now we can replace this on the other equation:
$14.50 = ($9.50 - 3*G) + 5*G
$14.50 - $9.50 = 5*G - 3*G
$5 = 2*G
$5/2 = G
$2.50 = G
Then each game costs $2.50
The cost to rent bowling shoes can be found with any of the two equations, for example i will use:
S = $9.50 - 3*G
Where we replace G by the value we found above.
S = $9.50 - 3*$2.50 = $2
S = $2.
The cost to rent bowling shoes is $2.
A local hamburger shop sold a combined total of 486 hamburgers and cheeseburgers on Sunday. There were 64 fewer cheeseburgers sold than hamburgers. How many hamburgers were sold on Sunday?
Answer:
Step-by-step explanation:
h and c are the numbers of hamburgers and cheeseburgers, respectively.
“a combined total of 486 hamburgers and cheeseburgers”
h + c = 486
“64 fewer cheeseburgers sold than hamburgers”
c = h - 64
Substitution:
h + (h-64) = 486
2h = 550
h = 275
275 hamburgers were sold
How do I divide this ?
If the length of a rectangle is decreased by 6 cm and the width is increased by 3 cm, the result will be a square, the area of which will be 27 cm^2 smaller than the area of the rectangle. Find the area of the rectangle. PLZZZZZZ HELP WILL MAKE BRAINLIEST!!!
Answer:
Step-by-step explanation:
L-6=W+3
L=W+9
LW-(L-6)(W+3)=27, using L from above makes this
W(W+9)-(W+9-6)(W+3)=27
W^2+9W-(W+3)(W+3)=27
W^2+9W-W^2-6W-9=27
3W-9=27
3W=36
W=12, since L=W+9
L=12+9=21
A=LW
A=21(12)
A=252 cm^2
The area of the rectangle is 252 cm^2.
Calculation of the area of the rectangle:Since
If the length of a rectangle is decreased by 6 cm and the width is increased by 3 cm.
So it can be like
L-6=W+3
L=W+9
Now
LW-(L-6)(W+3)=27
So,
W(W+9)-(W+9-6)(W+3)=27
W^2+9W-(W+3)(W+3)=27
W^2+9W-W^2-6W-9=27
3W-9=27
3W=36
Also,
W=12, since L=W+9
L=12+9=21
So,
A=LW
A=21(12)
A=252 cm^2
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Select the correct answer.
Which statement about the function represented by this graph is true?
A. The function has an inverse because it passes the vertical line test.
B. The function does not have an inverse because it never crosses the x-axis
C. The function has an inverse because it passes the horizontal line test.
D. The function does not have an inverse because it does not pass the horizontal line test.
Answer:
your answer will be C. The function has an inverse because it passes the horizontal line test.
bye have a nice day ^_^
C. The function has an inverse because it passes the horizontal line test.
What is function ?A function is a rule or a relation that associates each element of a non-empty set A, to at least a single element of another non-empty set B.
The relation f from a domain set to co-domain set is called function.
Example : f = {(x, y) | for all x∈X & y∈Y}
A relation becomes function when every element of domain has one and only one image in co-domain.
What is inverse of function ?If f is a function which is one-one as well as on-to, i.e, if the function is bijective, then the inverse of this function exists and the inverse is then denoted by [tex]f^{-1\\}[/tex]
Inverse function of a function always undoes the operations of the function f.
f(a) = b if and only if f⁻¹ (b) = a , where a is from domain & b is from co-domain set.
Which is the correct option ?From the above descriptions, we can see that, since the function passes through the horizontal line, so it has an inverse.
Hence the option C is the correct one.
C. The function has an inverse because it passes the horizontal line test.
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Match the correct graph to the equation.
Match the equation with its graph.
1. x+y=3
A
B
C
D
Answer:
D
Step-by-step explanation:
Change it so y=mx+b
y=-x+3
It can't be a or b because the intercept is positive 3
The slip is negative so that leaves D
193 students are attending the next reward trip. There are eight drives available and two types of vehicles,
school buses and minivans. The school buses seat 51 people each and the minivans seat 8 people each. How
many buses and minivans will be needed?
Answer:
3 busses and 5 vans
Step-by-step explanation:
3 x 51 = 153
193 - 153 = 40
40 / 8 = 5
Which measurement has the LEAST capacity?
2 gallons
7 quarts
19 pints
30 cups
Answer:
30 cups
Step-by-step explanation:
only equal to 15 pints
Given the following exponential function, identify whether the change represents
growth or decay, and determine the percentage rate of increase or decrease.
y = 2100(0.96)^x
I don't know exactly but I have gotten decrease
Answer:
decay decrease 4%
Step-by-step explanation:
Just did it on deltamath
The curve with equation y=8x^2+2/x has one turning point.
Find the coordinates of this turning point.
Answer:
Coordinates of turning point is (½, 6)
Step-by-step explanation:
We are given the equation of the curve as;
y = 8x² + (2/x)
At turning point, dy/dx = 0
Thus;
dy/dx = 16x - 2/x²
At dy/dx = 0, we have;
16x - 2/x² = 0
Rearrange to get;
16x = 2/x²
Multiply both sides by x² to get;
16x³ = 2
x³ = 2/16
x³ = 1/8
x = ∛(⅛)
x = ½
At x = ½, we have;
y = 8(½)² + (2/½) = 2 + 4 = 6
Thus, coordinates of turning point is (½, 6)
Scores on the final in a statistics class are as follows.
75 25 75 52 80 85 80 99 90 60
86 92 40 74 72 55 87 70 85 70
Required:
a. Calculate the 25th, 50th, and 75th percentiles.
b. Calculate the interquartile range.
c. Construct a boxplot. Are there any outliers?
Answer:
Kindly check explanation
Step-by-step explanation:
Calculate the 25th, 50th, and 75th percentiles.
b. Calculate the interquartile range.
c. Construct a boxplot. Are there any outliers?
Reordered data:
25, 40, 52, 55, 60, 70, 70, 72, 74, 75, 75, 80, 80, 85, 85, 86, 87, 90, 92, 99
25 th percentile :
1/4 (n + 1)th, tetm
n = 20
1/4(21) = 5.25th term
(5 + 6) th term / 2
= 65
50th percentile :
1/2 (n + 1)th, tetm
n = 20
1/2(21) = 10.5th term
(10 + 11) th term / 2
= 75
75th percentile:
3/4 (n + 1)th, tetm
n = 20
3/4(21) = 15.75th term
(15 + 16) th term / 2
= 85.5
Interquartile range :
Q3 - Q1
75th percentile - 25th percentile
85.5 - 65
= 20.5
25 is an Outlier
3.6 + t = 4.5
please answer this
Answer: t= 0.9
Step-by-step explanation:
3.6+t=4.5
Subtract 3.6 from both sides
This is hella easy got more like these if so keep em coming
The area of a rectangular wall of a barn is 72 square feet. Its length is 10 feet longer than twice its width. Find the length and width of the wall of the barn.
You have to assume value of width and have to use formula l×b.
I need help on this problem please help!!
Explanation:
Every time the top numbers go up by one ...
The bottom numbers go up by two.
Step-by-step explanation:
1/5:2/5:3/5:4/5:5/52/5:4/5:6/5:8/5Which is the better buy? $15.40 for 3.5 lbs of gummy bears or $7.65 for 1.8 lbs of gummy bears
Answer:
$7.65 for 1.8 lbs of gummy bears
Step-by-step explanation:
What is the measure of ∠UVW in the triangle shown?
Question 19 options:
A)
140°
B)
50°
C)
60°
D)
10°
Answer:
50°
Step-by-step explanation:
Given that a triangle measures 180°.
∠U =40°
∠W=90°
Sum:130°
180°-130°=50°
please answer this!!!!! im begging !!! pleaseeeeeeee