Answer:
Because 4 is a perfect square
Step-by-step explanation:
When simplifying a radical, you have to look for perfect squares. 4 is a perfect square but x is not. Variables are only perfect squares if they have even numbered exponents so the x has to stay in the radical.
<span>Given that the average
time it takes to replace a defective car radiator is 70 minutes with a
standard deviation of 12 minutes.
The 90% confidence interval of a random
sample of 50 is given by
</span>
How many males and how many females would there be if the total enrollment is 15000?
Ratio is
90 males 15000 - x
------------- = ---------------
125 fem x
Then 90x = 1875000 - 125x, or 215x = 1875000
x = approx 8720 females
and 15000-8720, or 6279 males
If every male finds a dance partner, that would leave (8720-6279) females, or 2440, without dance partners. ;(
Check: is the male:female ratio near 90:125?
Is 6279:8720 approx equal to 90:125?
Yes. 0.72 (approx) = 0.72 (approx).
y - y1 = m(x - x1)
Plug in:
Slope = m = 4
Point = (x1,y1) ----> (-3,7)
y - 7 = 4(x - -3) //Solve for y
y - 7 = 4(x + 3) //Answer
y - 7 = 4x + 12
y = 4x + 12 + 7
y = 4x + 19
Answer: B
//Hope it helps
Answer:
Step-by-step explanation:
<em>Hope this helps!!!</em>
