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erma4kov [3.2K]
4 years ago
10

If, in 7 years, Susan will be 2 times as old as she was 3 years ago, what is Susan’s present age? PLEAZE EXPLAIN HOW AND DO IT W

ITH USING X
Mathematics
2 answers:
Solnce55 [7]4 years ago
8 0

Answer:

Susan is 13 years old.

Step-by-step explanation:

Susan=x

After 7 years she will be 7+x  then she will be 2x as old as she was 3 year ago.

age 3 yrs ago=x-3

2x-6=7+x

if you simplify....

now she is 13

hope it helps!!!!

belka [17]4 years ago
5 0
Let Susan's present age be x

Now, after 7 years ( her age will become 7 +x then) she'll be 2 as old she was 3 years ago.

Her age 3 years ago must be x-3

Now according to question,

twice Her age 3 years ago = her age after 7 years

now,

2(x-3) = 7+x
2x-6 = 7+x
2x-x =7+6
x = 13
x = 13



Therefore, her age presenr age is 13 years.
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HELP URGENT. The following sphere has a diameter of 18 cm. What is the volume of the sphere? Use 3.14 for and round your answer
Trava [24]

The volume of the sphere with the given value of diameter is to the nearest tenth is 3052.1cm³.

Option C is the correct answer.

<h3>What is the volume of the sphere?</h3>

The volume of  the sphere is the amount of space occupied within the sphere.

Volume of sphere is expressed as;

V = (4/3)πr³

Where r is the radius and π is pi ( π = 3.14 )

Given that;

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  • Radius r = d/2 = 18cm/2 = 9cm
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V = (4/3)πr³

V = (4/3) × 3.14 × 9cm)³

V = (4/3) × 3.14 × 729cm³

V = 3052.1cm³

Therefore, the volume of the sphere with the given value of diameter is to the nearest tenth is 3052.1cm³.

Option C is the correct answer.

Learn more about volume of hemisphere here: brainly.com/question/3362286

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6 0
2 years ago
Alex has a rectangle piece of red paper that is 4 centimeter wide .its length is twice it's width she glues a piece of paper blu
xenn [34]
4cm•2=8cm which is the length of the red paper so therefore Red paper= 4cmx8cm.
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8 0
3 years ago
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matrenka [14]

Answer:

Step-by-step explanation:

Comment

The formula that relates edges faces and vertices is  F + V = E + 2

Givens

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Faces (F) = 25

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Solution

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The answer is 1.32

For this calculation, assuming that no conversions are required, the calcitonin goes as follows:


All that is needed is to subtract 57.7 from 59.02.

59.02 - 57.7 = ?

59.02 - 57.7 = 1.32

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3 years ago
BRAINIEST IF CORRECT (best to explain it will get it)
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Answer:

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