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3 years ago

Simplify the expression 9(10 + 5) / (6 - 5) A.95 B.135 C.85 D.17

2 answers:

8 0

Follow PEMDAS

first simplify the parenthesis

10 + 5 = 15
6 - 5 = 1

9(15)/1

multiply 9 and 15 together

9(15) = 135

135/1 = 135

B. 135 is your answer

hope this helps

noname [10]3 years ago

7 0

Hi there
It would be 135

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Calculating the Surface Area of a Triangular Prism The triangular prism shown has 1235 triangular face(s) and 1235 lateral face(

GenaCL600 [577]

Corrected Question

The triangular prism shown has 1, 2, 3 or 5 triangular faces and 1,2,3, or 5 lateral faces.

The area of one triangular face is 7.5,8.125,15,or 17 $mm^2$

The surface area of the triangular prism is 55.5,127.5,135,or 150 $mm^2$

Answer:

(B)2 triangular faces

(A)Area of one Triangular Face $=7.5mm^2$

(C)Total Surface Area of the Triangular prism $=135mm^2$

Step-by-step explanation:

The triangular prism is attached.

The triangular prism shown has 2 triangular faces and 3 lateral faces.

Base of the triangle =2.5mm

Height of the Triangle =6mm

Area of one Triangular Face $=\frac{1}{2}*6*2.5=7.5mm^2$

The dimensions of the lateral rectangles are:

2.5 mm by 8mm
6 mm by 8mm
6.5 mm by 8mm

Therefore, total surface area of the triangular prism

=2(Area of one Triangular Face)+Area of 3 rectangular faces

$=2(7.5)+ (2.5 X 8+ 6 X 8 + 6.5 X 8)\\=15+120\\=135mm^2$

Total Surface Area of the Triangular prism $=135mm^2$

8 0

3 years ago

Devon has 14 steel balls of equal weight. If he puts 8 of them in one pan of a balance, and the rest along with a weight of 20 g

astra-53 [7]

Let n be a number of balls: n = 14

In one pan you have 8 balls: 8n
In the other pan you have the rest of balls (14 - 8 = 6) along with a <span>weight of 20 grams = 6n + 20
So the pans are balanced:
8n = 6n + 20

Now, just solve the equation:
8n - 6n = 20
2n = 20
n = 20/2
n = 10
So, you know that a ball weights 10 grams.</span>

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vlada-n [284]

Answer:

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Step-by-step explanation:

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Suppose y varies inversely with x, and y = 6 when x = 3. Find x when y = 12.

slava [35]

Answer:

1.5

Step-by-step explanation:

$y \: \alpha \: \frac{1}{x}$

y = k ÷ x

yx = k

y = 6 , x = 3

6 • 3 = k

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x = 18÷12

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3 years ago