<span>Solve the following system of equations by linear combination:
3x + 2y = 7
y = x – 4
</span><span>3x+2(x-4)=7 now solve for x
3x+2x-8=7
combine terms
5x-8=7
add 8
5x=15
divide by 5
x=3
plug that into the second equation
y=3-4
y=-1
solution
(3,-1)</span>
The probability the first marble will be blue is 28/40
The probability the second marble will be red is 12/39
The reason is because 28 + 12 = 40, so this makes the denominator for our first outcome, but then a marble is removed making our denominator 39 because 40-1 = 39.
Answer:
D. Division Property of Equality
Step-by-step explanation:
-5x=4 is what we start out with
Then to isolate the x we divide -5x by -5
However because the two sides must remain equal you have to divide the other side by -5 as well
This is the Division Property of Equality which states that if you divide on one side, then you must divide on the other side as well.
Hope this helps you
Plug 3 in for the exponent
2^3=8