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3 years ago

If 2x + 5y = 10 and x = 3y + 1, what is 11x + 11y?

1 answer:

6 0

You have to solve the two equations by eliminating x or y
2x+5y=10 
x-3y=1 
Multiply all terms of second equation by two and subtract from first equation, thus eliminating x 

2x+5y-2x+6y=10-2 
11y=8 
y=8/11 
x=3y+1=3* 8/11+1=25/11 
11x+11y= 11*25/11+ 11*8/11 
= 25+8=33

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Please HELP I WILL REWARD BRAINLIEST ANSWER IM VERY CONFUSED

ozzi

Dilation is either : enlargement or shirking.

Simply you multiply the ordered pair times the dilation vector (Origin-Centered)

D.F = dilation factor;

d.f = 5

C' = d.fC

when you multiply a constant times an ordered pair , it multiples into each of the pair.

C' = 5 ( -5 , 1 ) = ( -25, 5 )

In case you were asked for A' , B' (test yourself before checking)

A' = 5 (-4,3) = ( -20 , 15)

B' = 5 ( 2, 3 ) = ( 10, 15)

Dividing the dilated by the original pair results in the dilation factor

A'/A = (-20/15)/(-4,3) = 5(-4,3)/(-4,3) = 5

4 0

3 years ago

Help me with this pleaae

marissa [1.9K]

Answer:

(D) 30pi inches

Step-by-step explanation:

First, we use the given volume, the given height, and the formula of the volume of a cylinder to find the radius of the base. Then we use the radius of the base to find the circumference of the base.

$volume = \pi r^2 h$

$volume = 6750 \pi~in.^3$

We set the formula equal to the volume and replace h with 30 in.

$\pi r^2 h = 6750 \pi~in.^3$

$\pi r^2 \times 30 ~in. = 6750 \pi~in.^3$

Divide both sides by 30pi in.

$r^2 = 225 ~in.^2$

Take the square root of each side.

$\sqrt{r^2} = \sqrt{225 ~in.^2}$

$r = 15~in.$

The radius of the base is 15 in.

Now we use the radius of the base and the formula of the circumference of a circle to find the answer.

$circumference = 2 \pi r$

$circumference = 2 \pi \times 15~in.$

$circumference = 30 \pi ~in.$

6 0

3 years ago

A pen is being built that is 10 feet long and 20 feet wide. How much fencing material will be ne

schepotkina [342]

I think its perimeter so you do 10x2=20 and 20x2=40 and add 20+40 to get 60 so the answer is 60 cause it says "fencing" which is the outer border

therefore answer is 60 feet

7 0

2 years ago

Read 2 more answers

Any help is appreciated

8_murik_8 [283]

Answer:

It can't be C or D. I think it could be A.

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3 years ago

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HELPP PLEASE DUE TOMMOROW PLEASE ANSWER QUESTION B

marin [14]