Answer:
Step-by-step explanation:
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Answer: B, but technically, all of them are correct except C.
Step-by-step explanation:
First, you fill in 1 for n:
= 2 x 4(1)
= 2 x 4
= 8
Next, I filled in 4 for n:
= 2 x 4(4)
= 2 x 16
= 32
Then, I filled in 8 for n:
= 2 x 4(8)
= 2 x 32
= 64
You can already figure this one out, and the answer is B.
Answer:
Integers = 18, 20 , 22
Step-by-step explanation:
Assume:
first number = x -2
second number = x
third number = x + 2
Sum of the first and second decreased by the third is 16:
(x - 2) + x - (x + 2) = 16
x - 2 + x - x - 2 = 16
x - 4 = 16
x = 20
Find the numbers:
first number = x - 2 = 20 - 2 = 18
second number = x = 20
third number = x + 2 = 20 + 2 = 22
Answer:
the solution is (-4, 2)
Step-by-step explanation:
6x + 8y = -8
x + 4y = 4
... can be solved using elimination by addition and subtraction, among other methods. Multiply the second equation by -2 to obtain
6x + 8y = -8
-2x - 8y = -8
Combining these results in
4x = -16. Thus, x = -4.
Substituting -4 for x in x + 4y = 4 results in
-4 + 4y = 4, or 4y = 8, or y = 2
Then the solution is (-4, 2)