Evaluate the expression when a=6 and b=45

Mathematics

2 answers:

KIM [24]3 years ago

3 0

Answer:

Step-by-step explanation:

Given

b - 4a ← substitute a = 6 and b = 45 into the expression

45 - 4(6) = 45 - 24 = 21

ASHA 777 [7]3 years ago

3 0

Answer:

Step-by-step explanation:

When you plug the values in the expression becomes 45 - 4(6). Following the order of operations multiply 4(6) first. Now the equation is 45 - 24. Subtract these numbers to get 21.

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HELP ME ANYONE ANYONE PLEASEEEEE I BEG FOR LOVE OF JESUS

soldi70 [24.7K]

Answer:

b. -84

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
Subtract Property of Equality

Algebra I

Terms/Coefficients

Step-by-step explanation:

Step 1: Define

$\displaystyle \frac{a}{-7} - 7 = 5$

Step 2: Solve for a

Addition Property of Equality: $\displaystyle \frac{a}{-7} - 7 + 7 = 5 + 7$
[Simplify] Add: $\displaystyle \frac{a}{-7}= 12$
Multiplication Property of Equality: $\displaystyle -7 \cdot \frac{a}{-7} = 12 \cdot -7$
[Simplify] Multiply: $\displaystyle a = -84$