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3 years ago

What is the answer to -7(z-6)=-70

Mathematics

2 answers:

Slav-nsk [51]3 years ago

5 0

-7(z - 6) = -70

-7z + 42 = -70
- 42 -42

-7z = -112

-7z/-7 = -112/-7
z = 16

Answer: z = 16

aivan3 [116]3 years ago

5 0

Distribute to get rid of parentheses. -7z+42= -70
Subtract 42 on both sides to get closer to isolating variable. -7z=-112
Divide -7 on both sides to finally isolate variable. z=16
Answer is z=16

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If Charles lost 20 pounds, he would weigh seven times as much as his dog. Together they weigh 200 pounds. How much does each wei

barxatty [35]

Answer: Weight of Charles = 177.5 pounds

Weight of dos = 22.5 pounds.

Step-by-step explanation:

Let x = Weight of Charles

y = Weight of dog.

As per given , we have the following system of linear equation :

$x+y=200--------(i)\\\\x-20=7y-----------(ii)$

We can write (ii) as :

$x-7y=20---(iii)$

Subtract equation (iii) from (i) , we get

$8y=180\\\\ y=\dfrac{180}{8}=22.5$

Put this value in (1) , we get

$x+22.5=200\Rightarrow\ x=200-22.5=177.5$

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3 years ago

What is the value of 3.2n when n=5

eduard

Answer:

16 (units)

Step-by-step explanation:

3.2n

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