3 years ago

40 points!!! Please Help!!! (MATH) Will give Brainliest!!!

Mathematics

1 answer:

Vedmedyk [2.9K]3 years ago

7 0

Answer:

A =62x^2

Step-by-step explanation:

The formula for surface area of a rectangular prism is given by

A=2(wl+hl+hw)

Given a width of 2x and length of 3x and a height of 5x, substitute into the equation

A = 2(2x*3x+ 5x*3x+ 2x*5x)

A = 2(6x^2 + 15x^2 +10x^2)

Combine like terms

A = 2(31x^2)

A =62x^2

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The amount of time (t) in minutes it takes Jeff to mow an average sized yard is related to (n) the number of yards he mows. The

Sveta_85 [38]

Answer:

Jeff mows 9 yards of lawn in 30 minutes

Step-by-step explanation:

The equation that models the amount of time (t) in minutes it takes Jeff to mow an average sized yard is $t=2n+12$ , where n is the number of yards he mows.

To find the number of yards Jeff mows in 30 minutes, we set the equation to 30 and solve for n.

$\implies 2n+12=30$

Add -12 to both sides:

$\implies 2n=30-12$

$\implies 2n=18$

Divide both sides by 2

$\implies \frac{2n}{2}=\frac{18}{2}$

$\implies n=9$

Hence Jeff mows 9 yards of lawn in 30 minutes.

4 0

3 years ago

Need some help please <br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B11%7D%7B15%7D%20%20%2B%20%28%20-%20%20%5Cfrac%7B3%7D%7B

emmasim [6.3K]

Answer:

-1/60

Step-by-step explanation:

$\frac{11}{15} + (- \frac{3}{4} )\\$

= $\frac{11}{15} - \frac{3}{4}\\$

= $\frac{44}{60} - \frac{45}{60}\\$ (find LCM of demoninators)

= $\frac{44-45}{60}\\$

= $\frac{-1}{60}\\$

= -1/60

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3 years ago

this graph shows the relationship between the pound of cheese brought at a deli and the total cost in dollars for the cheese

Savatey [412]

Easy! The best answer is B!

PLEASE GIVE ME THE BRAINLIEST I TRIED REALLY HARD ON THIS QUESITON!

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-7(4d+9c) use c=-6 and d=4

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4x4=16 9x(-6)=-54 16+(-54)=-38 -7x-38=266

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3 years ago

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Akimi4 [234]

Answer:Median

Step-by-step explanation:

4 0

3 years ago

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