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4 years ago

Which rectangular prism has a surface area of 56 square units?

Mathematics

2 answers:

prohojiy [21]4 years ago

7 0

Answer:

2 by 2 by 6.

Step-by-step explanation:

Given : Rectangular prism has a surface area of 56 square units.

To find : FInd dimensions of prism.

Solution : we have given that Surface area of rectangular prism = 56 units.

Formula of Surface area of rectangular prism = 2(wl+hl+hw)

l = length , w = width , h = height.

Surface area of rectangular prism = 2( 2*2 + 2 *6 + 6 *2 )

Surface area of rectangular prism = 2( 4 + 12 +12)

Surface area of rectangular prism = 2(28)

Surface area of rectangular prism = 56.

Therefore, 2 by 2 by 6.

blsea [12.9K]4 years ago

5 0

I believe the answer is the 3rd one

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Whats the answer?<br> And step by step?

s344n2d4d5 [400]

Answer:

one answer

Step-by-step explanation:

set the equal to each other and you get one answer

2x+6= -3x -4

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3 years ago

Solve the inequality 2x + 7 - 3x < 13 +2X. You must show your work and describe the graph of the solution on the number line.

kozerog [31]

Cancel equal terms on both sides of inequality

7-3x < 13

move constant to the right side and change its sign

-3x<13-7

subtract the numbers

-3x<6

divide both sides of inequality by -3 and flip the inequality sign

answer is: x>-2

4 0

3 years ago

Mr. Howard is a student teacher at the local junior high. His first‐period class of 40 students averaged 96% on a recent test. H

kodGreya [7K]

Answer:

The combined average is 94%

Step-by-step explanation:

for first period, number of students =40

average =96%

for second period, no of students =20

average =90%

but $average = \frac{sum of scores}{no of students}$

let $S_1$ =sum of students for the first period

$S_2$ =sum of students for the second period

for first period;

$\frac{S_{1} }{40} =96%$

$S_{1}= 96*40=3840$

for second period,

$\frac{S_{2} }{20} =90%$

$S_{1}= 90*20=1800$

therefore the combined average = $\frac{S_1+S_2}{40+20}$

that is $\frac{3840+1800}{40+20}$ $= 94%$

so combined average is 94%

3 0

3 years ago

Read 2 more answers

MATH WILL MARK BRAINLIST

mash [69]

Answer:

Step-by-step explanation:

y = 5x-4 when x=5

y = 5*5-4

y = 25-4

y = 21

y = -2/5x + 3/8 when x = 1/3

y = -2/5 * 1/3 + 3/8

y = -2/15 + 3/8

y = -6/120

y = -1/20

y = 3x + 12 when x = 4

y = 3*4 + 12

y = 12 + 12

y = 24

8 0

3 years ago

Let X have the probability mass function P(X = −1) = 1 2 , P(X = 0) = 1 3 , P(X = 1) = 1 6 Calculate E(|X|) using the approaches

Studentka2010 [4]

Answer:

Step-by-step explanation:

From the given information:

Note that the possible values of Y are 0 and 1 because;

y = 0 if X = 0 and y = 1 if X = ±1

∴

$P(Y =0) = P(X = 0) =\dfrac{1}{3}$

$P(Y = 1) = P(X = -1 \ or \ 1) \\ \\ = P(X = -1) + P(X = 1)$

$= \dfrac{1}{2}+ \dfrac{1}{6}$

$=\dfrac{3+1}{6}$

$= \dfrac{2}{3}$

$E(|X|) = \sum |x| P(X=x) = ( 1 \times \dfrac{1}{2}) + ( 0\times \dfrac{1}{3}) + ( 1 \times \dfrac{1}{6})$

$= \dfrac{2}{3}$

7 0

3 years ago