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1 vote
Please please help it's timed!
determine the value of y, if x is 7.

y=x^2-1

User Cfreak
by
6.5k points

1 Answer

2 votes

Answer:

y = 48

Explanation:

Plug in 7 for x:

y = x² - 1

y = (7)² - 1

Simplify. Remember to follow the order of operations, PEMDAS.

PEMDAS stands for:

Parenthesis

Exponents (& roots)

Multiplication

Division

Addition

Subtraction

~

First, solve the power, then subtract:

y = (7)² - 1

y = (7 * 7) - 1

y = (49) - 1

y = 48

48 is your value for y.

~

User Yellowbuck
by
7.3k points