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igor_vitrenko [27]
3 years ago
8

You need to wrap a present that is in the shape of a rectangular prism the present has a length of 5 inches a width of 4.5 inche

s and a height and a height of 3.5 inches find the total surface area of the present
A. 111.5 in2

B. 55.75 in2

C. 95.75 in2

D. 135 in2
Mathematics
1 answer:
Vadim26 [7]3 years ago
5 0
The equation for surface area is 2(lw+lh+wh) or length times width plus length times height plus width times height times 2.

so in this problem legth=5 and width=4.5 so 5×4.5=22.5

length=5 height=3.5 so 5×3.5=17.5

width=4.5 height=3.5 so 4.5×3.5=15.75

add these together and you get 55.75.

now we multiply that by 2 so 55.75×2=111.5

so the surface area of the gift is (drumroll please) 111.5
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vitfil [10]

Hi there!

\large\boxed{y = 12, x = 3}

The two trapezoids are similar, so we can determine a common scale factor:

OL/UR = NM/TS

9/3 = 6/2

3 = 3

Trapezoid ONML is 3x larger than UTSR, so:

RS = 4, LM = y

3RS = LM

3 · 4 = y = 12.

Find x using the same method:

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4 0
3 years ago
9 is the difference between two numbers, and their sum is 31. Find the numbers.
algol [13]

Answer:

The first number is 20, the second one is 11

Step-by-step explanation:

Let the first number be x and the second number be y

Since it says "9 is the difference between two numbers", the first equation will be x-y=9

It also says that "their sum is 31". That means the second equation will be x+y=31

here are the two equations:

x-y=9

x+y=31

You can solve this any way you like, but I'll show elimination

add the two equations

x-y=9

x+y=31

2x=40

divide by 2

x=20

Substitute 20 as x in one of the equations

20+y=31

subtract 20 from both sides

y=11

That means the two numbers are 20 and 11

Hope this helps!

4 0
3 years ago
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Amanda [17]

Answer: 6y I think. If you would have to add all of the y’s and so you would have 3 y’s and then you add both 3 y’s so 6y

I don’t know if I am right sorry if I’m wrong

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3 years ago
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Alik [6]
I would say C. 5.516 m.

Hope this helps !

Photon
5 0
3 years ago
Read 2 more answers
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