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3 years ago

I need to know the surface area of this prism please help !!!! I will give brainlist !

Mathematics

2 answers:

aivan3 [116]3 years ago

4 0

Answer:

614

Step-by-step explanation:

15 x 13 = 195 two times 195 x 2 = 390

4 x 15 = 60 two times 60 x 2 = 120

4 x 13 = 52 two times 52 x 2 = 104

104 + 120 + 390 = 614

nevsk [136]3 years ago

4 0

Answer:

SA = 2(l·w)+2(w·h)+2(l·h)

SA = 614 sq in

Step-by-step explanation:

SA = 2(4x13)+2(13x15)+2(4x15)

= 2(52)+2(195)+2(60)

= 104 + 390 + 120

= 614

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The principal of a high school spent 1700 for X desk each and Y chairs at $25 each if he had bought half the number of desk in t

KatRina [158]

Answer:

25X + 25Y = 1700

25X + 100Y = 3200

Step-by-step explanation:

Given that the principal of a high school spent $1700 for X desk and Y chairs at $25 each. Then, the equation will be

25X + 25Y = 1700 ....... (1)

If he had bought half the number of desk in twice the number of chairs he would have spent 1600. That is

25(X/2) + 25(2Y) = 1600

25X/2 + 50Y = 1600

Find the LCM and cross multiply

25X + 100Y = 3200 ........(2)

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3 years ago

Michelle is building a rectangular landing strip for airplanes .She has material to cover 1/1,500 of a square mile. The landing

ANEK [815]

I think that the missing word here is:
"with the amount of the material that Michelle has"

Let's say that her landing strip is x miles long, then its area would be:

$\frac{1}{6} *x$

We also know how big it is:

$\frac{1}{6} *x= \frac{1}{1 500}$

now, let's multiply both sides by 6:
$\frac{6}{6} *x= \frac{6}{1 500}$
$1 *x= \frac{3}{750}$
$x= \frac{1}{250}$

So the answer is that it would be $x= \frac{1}{250}$ miles wide

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4 years ago

What does a slope tell us

8_murik_8 [283]

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3 years ago

Read 2 more answers

If m 1 = 140 and m 3 = 50, what is m 5

dolphi86 [110]

The answer is: m5 = -40.

7 0