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azamat
2 years ago
6

If x2 - 4 = 45, then x could be equal to 9 3 5 -7 -4

Mathematics
1 answer:
Ivanshal [37]2 years ago
5 0
Transpose the constant on the left hand side of the equation to the right side. The equation becomes x² = 45 + 4, 
                                               x² = 49
                                           x = sqrt(49) 
                                            x = 7 and x = -7
Only -7 is on the choices. Thus, the answer is x = -7.
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3 years ago
Read 2 more answers
Kilo typed 1,125 words in 15 minutes let w represent the number of words typed each minute If Lolo typed the same number of word
Alborosie

Answer:

She type <u>75 words</u> in 1 minute.

Step-by-step explanation:

Given:

Lolo typed 1,125 words in 15 minutes.

Let w represent the number of words typed each minute.

Now, to find the number of words she type in 1 minute if Lolo typed the same number of words each minute.

So, we solve it by using cross multiplication method:

<u><em>As 1125 words is equivalent to 15 minutes.</em></u>

<u><em>Thus, w number of words equivalent to 1 minutes</em></u>.

\frac{1125}{15} =\frac{w}{1}

By cross multiplying we get:

⇒ 1125=15w

<em>Dividing both sides by 15 we get:</em>

⇒ 75=w

⇒ w=75.

Therefore, she type 75 words in 1 minute.

4 0
2 years ago
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