Answer:
54
Step-by-step explanation:
60% of 90 = 60/100 × 90
= 0.6 × 90
= 54
Therefore, 60% of 90 is 54.
Answer:
2(x-5)=6x
Step-by-step explanation:
When you match the pattern of (x+y)⁴ to (a+b)ⁿ, you see that a=x, n=4. Then the first term aⁿ can be found by substituting these values for "a" and "n":
... x⁴
Answer:

is the system of equations representing the situation.
Step-by-step explanation:
Given:
Alexandra finds that she can give 3 haircuts and 2 hair dyes in 315 minutes. Giving 2 haircuts and 4 hair dyes takes 450 minutes.
Now, to find the system of equations representing the situation.
<u><em>Let the number of haircuts be </em></u>
<u><em /></u>
<u><em>Let the number of hair dyes be </em></u>
<u><em /></u>
So, Alexandra can give 3 haircuts and 2 hair dyes in:

Now, giving 2 haircuts and 4 hair dyes in:

Therefore,

is the system of equations representing the situation.
Answer:
x = -4
Step-by-step explanation:
x/8 = -1/2
-1/2 = ?/8
2 * 4 = 8
-1 * 4 = -4
2 * 4 = 8
-1/2 = -4/8
x = -4