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irina [24]
3 years ago
11

What is 3/5 subtracted from 21/25​

Mathematics
2 answers:
german3 years ago
5 0

Answer: -6/25

Step-by-step explanation: The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.

LCD(3/5, 21/25) = 25

Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1. Finish the multiplication The two fractions now have like denominators so you can subtract the numerators.The two fractions now have like denominators so you can subtract the numerators. Then boom you have -6/25 good luckkkkkkk

raketka [301]3 years ago
3 0

Answer:

-6/25 (Decimal: -0.24)

Step-by-step explanation:

3×5/5×5 = 15/25

15/25 - 21/25

since denominators are same combine fractions

15 - 21 / 25

subtract numbers 15 - 21 = -6

-6/25

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Please help :) im stupid and bad at this lol
My name is Ann [436]

Answer:

Addition. “Also, I have to stop at the store on the way home.” ...

Comparison. “In the same way, the author foreshadows a conflict between two minor characters.” ...

Concession. “Granted, you did not ask ahead of time.” ...

Step-by-step explanation:

4 0
3 years ago
The radius of a wheel is 21m.how much distance will it covers when it rotates 5 times?​
mrs_skeptik [129]

Answer:

Distance = 660 meters

Step-by-step explanation:

Given the following data;

Radius, r = 21 m

Number of revolutions = 5 times

To find the distance covered;

The distance covered in one revolution is given by the circumference of a circle.

Mathematically, circumfeence of a circle is equal to;

C = 2πr

Substituting into the formula, we have;

C = 2 * 22/7 * 21

C = 44 * 3

C = 132 meters

Next, we find the distance covered;

Distance = Circumference * Number of revolutions

Distance = 132 * 5

Distance = 660 meters

8 0
3 years ago
Divide. Write your answer in simplest form. 6/7 ÷ 5/21​
Serjik [45]
The answer is 8/5.
To divide fractions, flip the second fraction and multiply.
For example,
= 6/7 • 21/5
= 126/35
Simplify by dividing both sides by 7 to get your answer.
= 8/5
5 0
4 years ago
Paula has $54. She bought some pencils, each costing $0.75, and a paper ream for $2.50. She is left with $42.50 after buying pen
8090 [49]

Answer:

12 pencils

Step-by-step explanation:

let no. of pencils bought be x.

54 - 0.75x - 2.50 = 42.50

9 = 0.75x

x = 12

Topic: algebraic equations

If you like to venture further, feel free to check out my insta (learntionary). I'll be constantly posting math tips and notes! Thanks!

7 0
3 years ago
Can someone please help with NUMBER 7?!! It’s my last one I will mark brainliest to the best answer
Nikolay [14]

Answer:

1, 3, 9, 27

Step-by-step explanation:

a_n = 3^{n - 1}

You need the first 4 terms, so let n = 1, and evaluate the expression. Then do the same for n = 2, n = 3, and finally n = 4.

n = 1

a_1 = 3^{1 - 1} = 3^0 = 1

n = 2

a_2 = 3^{2 - 1} = 3^1 = 3

n = 3

a_3 = 3^{3 - 1} = 3^2 = 9

n = 4

a_4 = 3^{4 - 1} = 3^3 = 27

7 0
3 years ago
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