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andrey2020 [161]
2 years ago
9

Help please im marking brainliest

Mathematics
1 answer:
Strike441 [17]2 years ago
3 0

The surface area of the triangular prism is of 140 cm².

<h3>What is the surface area of a prism?</h3>

It is the sum of the areas of all faces of a prism. In this problem, the prism has these following faces:

  • One rectangle of dimensions 8 cm and 6 + 4 + 5 = 15 cm.
  • Two right triangles with sides 4 cm and 5 cm.

For a rectangle, the area is given by the multiplication of the dimensions, hence:

Ar = 8 x 15 = 120 cm²

For each right triangle, the area is given by half the multiplication of the sides, hence:

At = 2 x 0.5 x 4 x 5 = 20 cm².

Then the surface area of the prism is:

S = 120 cm² + 20 cm² = 140 cm².

More can be learned about surface area at brainly.com/question/28123954

#SPJ1

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Chiara has 26 coins that equal 34 cents. All the coins are pennies, p, and nickels, n. How many nickels and pennies does Chiara
wlad13 [49]

Answer:

Chiara has 2 penny coins and 24 nickel coins

Step-by-step explanation:

Let

p ----> the number of penny coins

n ---> the number of nickel coins

Remember that

1\ penny=\$0.01

1\ nickel=\$0.05

Chiara has 26 coins that equal 34 cents

so

p+n=26

isolate the variable x

p=26-n ----> equation A

34 cents=$0.34

0.01p+0.05n=0.34

Multiply by 100 both sides

p+5n=34

isolate the variable x

p=34-5n -----> equation B

Create a table  to guess

assume  different values of n and determine the value of p in equation A and equation B

The solution is when the value of p in the equation A must be equal to the value of p in equation B

1) For n=1

equation A

p=26-1=25

equation B

p=34-5(1)=29

29\neq 25

2) For n=2

equation A

p=26-2=24

equation B

p=34-5(2)=24\\24=24

therefore

The solution is (2,24)

Chiara has 2 penny coins and 24 nickel coins

3 0
3 years ago
Read 2 more answers
The stack on the left is made up of 15 pennies, and the stack on the right is also made up of 15 pennies. If the volume of the s
svetoff [14.1K]

Answer:

The correct answer to this question is 375. mm^3. I hope this helps, like actually.

Step-by-step explanation:

Please report the second answer for posting adult content.

4 0
3 years ago
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HELP! solve for p p+10/p-7=8/9
Nastasia [14]
\frac{P+10}{P-7} =  \frac{8}{9} 

use the cross method solve the equation.

9P+90=8P-56
9P-8P=-56-90
P=-146

Hope this helps.
8 0
3 years ago
Kelsey graphed the equation y = 3x + 1 as shown below.
miv72 [106K]
I think it’s B but I’m not for sure
6 0
3 years ago
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given triangle PQR with QR = 8, PQ = 6, and m p = 90 degrees, which of the following choices is used to determine m r
marishachu [46]

The value of the angle R in the right triangle PQR is sin⁻¹ 6 / 8

The situation forms a right angle triangle.

<h3>How to find an angle in a right triangle?</h3>

The angle R can be found as follows:

using trigonometric ratios,

sin R = opposite / hypotenuse

Therefore,

opposite sides = 6

hypotenuse = 8

sin R = 6 / 8

R = sin⁻¹ 6 / 8

learn more on right triangle here: brainly.com/question/6322314

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6 0
3 years ago
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