Answer:
A. 8/7
Step-by-step explanation:
<h3>Step 1 </h3>
4/7 - (-4/7) --> 4/7 + 4/7
The two minutes turn into a plus, removing the bracket.
<h3>Step 2</h3>
4/7 + 4/7 = 8/7
Add the two fractions together.
Answer:
Prime.
Step-by-step explanation:
2x^3 - 3x^2 + 2.
There are no factors of this expression. It is prime.
Answer:
x=1 y = -1/2
(1,-1/2)
Step-by-step explanation:
7x-2y=8
5x+2y=4
I would use elimination since we have 2y in one equation and -2y in the other
7x-2y=8
5x+2y=4
--------------------
12x = 12
Divide each side by 12
12x/12 = 12/12
x =1
The substitute back into equation 2
5(1) +2y = 4
5 +2y = 4
Subtract 5
5-5+2y = 4-5
2y = -1
Divide by 2
2y/2 = -1/2
y = -1/2
Answer: 3.36
Step-by-step explanation: 75minutes / 28= 2.678571428571429
9/2.678571428571429=3.36 times
Subtract 3 first so it would be 7x=15
then divide by 7 so x would be approximately 2.14
