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KonstantinChe [14]
3 years ago
7

-8(2z - 70) use z = 5 and c = 2

Mathematics
2 answers:
Dima020 [189]3 years ago
8 0

Answer:

480

Step-by-step explanation:

-8( 2(5) - 70)

-8 ( 10 - 70)

-80 + 560

480

Neporo4naja [7]3 years ago
6 0

Answer:

480

Step-by-step explanation:

So we have the expression:

-8(2z-70)

And we want to evaluate it for z=5 and c=2:

So:

=-8(2(5)-70)

Multiply within the parentheses:

=-8(10-70)

Subtract within the parentheses:

=-8(-60)

Multiply:

=480

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The senior classes at High School A and High School B planned separate trips to the indoor
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Answer:

The number of students in each <u>van are 7</u> and number of students in each <u>bus are 23.</u>

Step-by-step explanation:

Let the number of students in each van be 'x' and number of students in each bus be 'y'.

Given:

<u>High School A:</u>

Number of students = 132

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Number of vans = 9

As per question,

9x+3y=132-------1

<u>High School B:</u>

Number of students = 205

Number of buses = 8

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As per question,

3x+8y=205-------2

Multiplying equation (2) by -3 and adding the result to equation (1), we get:

-3(3x+8y)=-3(205)\\-9x-24y=-615

-9x-24y=-615\\9x+3y=132\\---------\\-21y=-483\\y=\frac{-483}{-21}=23

Now, plug in 23 for 'y' in equation (1) and solve for 'x'. This gives,

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3 years ago
How do you solve V+6V=59
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the ratio of men to women in a certain factory is 3 to 4. There are 198 men. How many workers are there?
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3/198 = 7/x

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Proof:

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