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3 years ago

I am less than 90 but more than 20.I round to 60 and the sum of my digits is 9.Who am I ?

Mathematics

2 answers:

Bumek [7]3 years ago

8 0

63 can be your answer

Add the digits: 6 + 3 = 9

Round: 63, 3 is less than 5, therefore, round down. 63 rounded = 60

20 < 63 < 90

hope this helps

Dennis_Churaev [7]3 years ago

6 0

You have the be 63 for sure!

So, you're less than 90. I got that. Than, you're older than 20.

We than know that your age is rounded up to 60. So, if we do 9- 3 = 6.

Let's inverse that. 6+3=9 which means . . . You're 63 years old. I'm sure you have a couple wrinkles by then! ;)

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sukhopar [10]

Answer:

(3m-4/5)2

Final result :

(15m - 4)2

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Step by step solution :

Step 1 :

Simplify —

Equation at the end of step 1 :

(3m - —)2

Step 2 :

Rewriting the whole as an Equivalent Fraction :

2.1 Subtracting a fraction from a whole

Rewrite the whole as a fraction using 5 as the denominator :

3m 3m • 5

3m = —— = ——————

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Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2 Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

3m • 5 - (4) 15m - 4

———————————— = ———————

5 5

Equation at the end of step 2 :

(15m - 4)

(—————————)2

Step 3 :

Final result :

(15m - 4)2

———

Step-by-step explanation:

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2 years ago

There are 12 students in a homeroom wearing a school t-shirt these students make up 60% of the class how many students are in th

Yuki888 [10]

Answer:

there is a total of 20 students in the class because 60% of 20 is 12

Step-by-step explanation:

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3 years ago

You are in $33 in eight hours at that rate how much would you earn in five hours

svp [43]

Answer:

20.625 dollars or about 20.63 dollars

Step-by-step explanation:

33/8 = 4.125

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3 years ago

What is the volume of a sphere with a diameter of 15 cm? Round the answer to the nearest whole number.

AveGali [126]

Answer:

1767 cm³

Step-by-step explanation:

We can use volume V = 4/3 π r³

We have diameter of 15 cm. To get radius, we need to divide diameter by 2.

r = 7.5 cm

So now plug in r = 7.5 then calculate V:

V = 4/3 π ( 7.5 )³

V = 4/3 π * 421.875 ≈ 1767.145 ≈ 1767

Hope this helps.

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3 years ago

Saul makes green paint by mixing blue paint and yellow paint.

Mamont248 [21]

Answer:

12 gallons of yellow paint

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Step-by-step explanation:

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So if you want 16 gallons of paint total using the same ratio of colors then you need to figure out how many of the recipe you will need to put in by dividing

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Hope this helps! :)

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2 years ago