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Dovator [93]
3 years ago
11

7/8 = 21/k whats k ​

Mathematics
2 answers:
uysha [10]3 years ago
6 0
You would use cross multiplication to solve.
7(k) = 8(21) , 7k = 168 , k = 24
Ksju [112]3 years ago
3 0

Answer:

k = 24

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

Step-by-step explanation:

<u>Step 1: Define</u>

7/8 = 21/k

<u>Step 2: Solve for </u><em><u>k</u></em>

  1. Cross-multiply:                              7k = 168
  2. Divide both sides by 7:                 k = 24

<u>Step 3: Check</u>

<em>Plug in k to verify it's a solution.</em>

  1. Substitute:                    7/8 = 21/24
  2. Simplify:                        7/8 = 7/8

Here we see that 7/8 does indeed equal 7/8. ∴ k = 24 is a solution.

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