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4 years ago

I need help on this problem 6j-3 for j=4

Mathematics

1 answer:

VARVARA [1.3K]4 years ago

5 0

Answer:

Step-by-step explanation:

6j - 3

6(j)-3

if j = 4

then 6(4)-3

parentheses w/out any other symbol is multiplication

so 6 * 4 = 24

24-3

24-3 = 21

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5 0

3 years ago

What is the missing value in the proportion 4/5 = x/30?

ra1l [238]

Answer:

$\displaystyle x = 24$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Step-by-step explanation:

Step 1: Define

$\displaystyle \frac{4}{5} = \frac{x}{30}$

Step 2: Solve for x

[Multiplication Property of Equality] Cross-multiply: $\displaystyle 5x = 120$
[Division Property of Equality] Divide 5 on both sides: $\displaystyle x = 24$

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