Answer:
A and D
Step-by-step explanation:
3x + 2 = x + x + x + 2
2(x+1)+x = 2x + 2 + x = 3x+2
Answer:
-95/6 or -15.83 repeating
Step-by-step explanation:
She can mostly add 35 and 9 and it will give you 44
$30/ 3 sweatshirts = $10 /shirt
$ 10/shirt * 4 shirts = $40
It would cost $40
Answer:
1877 computer users
Step-by-step explanation:
We have that for 95% of confident, the value of z has a value of 1.96 (attached table about it), they also mention the margin of error (E) that is 10 and finally the standard deviation (sd) that has a value of 221.
We apply the following formula:
n = [z * sd / E] ^ 2
replacing:
n = [1.96 * 221/10] ^ 2
n = 1876.27
that is, the minimum sample size is 1877