Answer:
I believe it's eighteen.
Step-by-step explanation:
Yes.The second factor is the difference of 2 squares,
so the second factor alone becomes
(x² - 4) = (x + 2) (x - 2)
Answer:
390
Step-by-step explanation:
plug in 7 for the x values and solve and you get 390.
Answer:
10a = 30
Step-by-step explanation:
By using elimination:
4a + 2z = 10
-2(3a + z) = -2(-10)
4a + 2z = 10
6a - 2z = 20
2z and -2z cancel out
10a = 30
a = 3
They are asking for 10a, so 10 (3) = 30.
Answer:
88
Step-by-step explanation:
We have 4 numbers that sum to 354.
So, let us use a letter to represent the first consecutive number in the sum.
Let it be x.
x + (x + 1) + (x + 2) + (x + 3) = 354
We want (x + 1), the second number in the sequence.
Simplify x + (x + 1) + (x + 2) + (x + 3) = 354
x + (x + 1) + (x + 2) + (x + 3) = 4x + 6 = 354
4x + 6 = 354
4x = 354 - 6
4x = 348
x = 348/4 = 87
so x + 1 = 87 + 1 = 88