If x2 - 4 = 45, then x could be equal to

Hi there!

To find x, we need to simplify. 

x^2 -4 = 45
x^2 = 49
sqrt(49) = 7

So, x = 7. 

Hope this helps!

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

3x+9+4x+x=8x+9that's the answer for your question.