$f(x) = \sqrt{ {x}^{2} } - 5 \\ = > f(4) = \sqrt{ {(4)}^{2} } - 5 \\ \: \: \: \: \: \: \: \: \: \: = \sqrt{16 } - 5 \\ = 4 - 5 \\ = - 1 \\ or \\ = - 4 - 5 \\ = - 9$

<h3>Answer:</h3>

-1 or -9

<h3>Hope it helps</h3>

ray4918 here to help

3 0

2 years ago

Use grouping symbols to make the following equation true. 5³ ÷ 5+20=5

Alona [7]

In this question,We have to group the given expression to get 5 as the final answer .

$5^3 \div 5+20$

Here we put 5 +20 in parenthesis, that is

$5^3 \div (5+20)$

And we do the required operations, that is

$=125 \div 25 =5$

And we get 5.

3 0

3 years ago

Sandy works at a clothing store.She makes $8 per hour plus 10% commission on her sales.She worked 79 hours over the last two wee

Nonamiya [84]

873 for sure 2,414x10%=241 + 8x79=632 =873

5 0

2 years ago

. Laura and Alicia both exercise 5 days a week. Laura exercises for 30 minutes each day. Alicia exercises for 45 minutes each da

statuscvo [17]

Answer: 1 hour 15 minutes

Step-by-step explanation:

From the question, we are informed that Laura and Alicia both exercise 5 days a week and that Laura exercises for 30 minutes each day. For the 5 days, she'll exercise for:

= 5 × 30 minutes

= 150 minutes

= 2 hours 30 minutes

Alicia exercises for 45 minutes each day. Fir the 5 days, she'll exercise for:

= 5 × 45 minutes

= 225 minutes

= 3 hours 45 minutes

We then calculate the difference in their exercise per week which will be:

= 3 hours 45 minutes - 2 hours 30 minutes

= 1 hour 15 minutes

6 0

2 years ago

Using the given information, find the sum of each arithmetic series. 12. a, = 6 d = 7 n = = 12 S 12​

Using the given information, find the sum of each arithmetic series. 12. a, = 6 d = 7 n = = 12 S 12