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3 years ago

How are you expose to solve 7n-7n=1

Mathematics

1 answer:

eduard3 years ago

6 0

You just subtract normally because they both have the same variable. I hope you find this helpful.

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What is the discount given on a jacket that was originally priced $90 and is now $72?

torisob [31]

Answer:

Step-by-step explanation:

The disCount will be the differenceb

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3 years ago

a tree casts a shadow 42 feet long.at the same time, a person 5 feet tall casts a shadow 7 feet long. what is the hight of the t

arlik [135]

Answer:

height of the tree is 30 feet

Step-by-step explanation:

a tree casts a shadow 42 feet long . at the same time, a person 5 feet tall casts a shadow 7 feet long.

shadow of a 5 feet tall person is 7 feet long

Let x be the height of the tree

shadow of a 42 feet tree is x feet long

Make a proportion

$\frac{x}{42} =\frac{5}{7}$

cross multiply

$7x=(42)(5)$

$7x=210$

divide by 7 on both sides

x=30

So height of the tree is 30 feet

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3 years ago

Judy buys dorito bags $0.40 each and sold them for $1.00 each. what was the percent increase

myrzilka [38]

Getting the percentage increase, we can form the formula or equation.
Percentage increase = ($1.00 - $0.40) / $0.40 * 100
Percentage increase = ($0.60) / $0.40 * 100
Percentage increase = 1.5 * 100
Percentage increase = 150%

So there is a 150% increase from the original price.

6 0

3 years ago

Please find the area.

lakkis [162]

Answer:

Step-by-step explanation:

area=15×9+1/2×6×9

=135+27

=162 m²

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3 years ago

A cylinder has a base diameter of 16 feet and a height of 4 feet.

Ratling [72]

Answer:

Step-by-step explanation:

radius = 16/2 = 8

Then you can apply the formula to calculate the base area, lateral surface or surface or even perimeter

7 0

2 years ago

Read 2 more answers