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3 years ago

A girl was born 35 years after her mum what fraction of her mum's age would a girl be at age 15

Mathematics

2 answers:

Nadusha1986 [10]3 years ago

8 0

Answer:

3/10

Step-by-step explanation:

mom = 35 when girl is born

girl = 0 when born

after 15 year

mom = 35 + 15 = 50

girl = 0 + 15 = 15

fraction = girl / mom = 15/50 = 3/10

Lubov Fominskaja [6]3 years ago

4 0

Answer:

3/10 or 30%

Step-by-step explanation:

So the mom was 35 when she had her kid. When the kid is 15, that would make the mom 50 (35+15).

Then just divide! The term "fraction" is just a confusing term that most of the time means to divide.

15/50 is 3/10. If you want it as a percentage, then multiply the whole thing by 10/10, which gives you 30/100, or 30% of her mom's age. Hope this helped!

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Find each number. Round to the nearest tenth if necessary

Pavel [41]

Answer:

96
6.9
25%
8%
79
33.8

Step-by-step explanation:

Here is the complete question: Find each number. Round to the nearest tenth if necessary.

80% of 120.
115% of 6
What percent of 128 is 32?
3 is what percent of 36?
23.7 is 30% of what number?
71/2% of what is 12?

1) 80% of 120

= $\frac{80}{100} \times 120= 8\times 12$

= 96

∴ 80% of 120= 96

2) $115\%\ of\ 6$

= $\frac{115}{100}\times 6= 1.15\times 6$

∴ $115\%\ of\ 6$ = 6.9

3) What percent of 128 is 32?

= $\frac{32}{128} \times 100$

= $25\%$

4) 3 is what percent of 36?

= $\frac{3}{36} \times 100$

= $8\%$

5) 23.7 is 30% of what number?

Let the number be "x".

⇒ $\frac{30}{100} \times x= 23.7$

Cross multiplying

⇒ $x= \frac{23.7\times 100}{30}$

∴ x= 79.

6) 71/2% of what is 12?

Lets assume the required number be "x".

⇒ $\frac{71}{2} \times 100\times x= 12$

cross multiplying both side.

⇒x= 33.8

∴ 71/2% of 33.8 is 12

6 0

3 years ago

2x-6y=12 and -5x+15y=-30 elimination

Reptile [31]

Answer:

unsolvable because the second equation is just -2.5 times the first equation.

Step-by-step explanation:

2x-6y=12 then 2x=12+6y x=6+3y

-5x+15y=-30

substitute x

-5(6+3y)+15y=-30

-30-15y+15y=-30

y=y

8 0

3 years ago

Are all irrational numbers real numbers. If so , why

Elena L [17]

Yes, all numbers are real numbers because a number is a number, and nothing can change that. I hope this helps you!

5 0

3 years ago

Solve using distributive property 4x28

damaskus [11]

4 x 28 = 112

Hope that helped! (:

3 0

3 years ago

Read 2 more answers

What expressions are equivalent to 7^3 * 7^x

solong [7]

Answer:

The question = (7^3)*(7^x)

When multiplying two exponents with the same base, all you do is add the exponents together and keep the same base

Therefore,

(7^3)*(7^x) = 7^(3+x)

Step-by-step explanation:

7^3+x is the answer

3 0

3 years ago

A girl was born 35 years after her mum what fraction of her mum's age would a girl be at age 15​

A girl was born 35 years after her mum what fraction of her mum's age would a girl be at age 15