"Twice" means to double or times by 2 and "the sum" means the addition of two numbers.
So, C. 2(y + 9) is the answer.
Answer:
Left-hand side: .
Right-hand side: .
Step-by-step explanation:
Apply the logarithm power rule: for all .
This property is not only true for logarithm to the base , but for other bases, as well.
Take the logarithm (to the base ) of the left-hand side of this equation:
.
For the right-hand side of this equation, consider the logarithm quotient rule:
for all and .
Indeed, on the right-hand side of this equation, and . Therefore:
.
This expression could be further simplified. Notice that is equivalent to for all . (Think about how whereas .)
Therefore, would be equivalent to . Apply the logarithm power rule to show that .
.
Indeed, the left-hand side of this equation matches the right-hand side.
Answer:
x = 2.2
Step-by-step explanation:
- 4 (2x + y = 3.4) + (8x + 2y = 11.6)
( - 8x - 4y = - 13.6) + (8x + 2y = 11.6)
- 2y = 2
y = - 1
2x + ( -1 ) = 3.4
2x = 4.4
x = 2.2
Answer:
D
Step-by-step explanation:
Point: (4,-8)
Slope: -2
y-y1=m(x-x1)
y+8=-2(x-4)
It is 6x -23y. You cannot factor using GCF any further.