Step-by-step explanation:
factor 4 out of the variable terms, as this helps.
but my approach is simply to define the target and then calculate "backwards".
we want to find
(ax + b)² = a²x² + 2abx + b²
and now we compare with the original equation :
a²x² = 4x²
a² = 4
a = 2
2abx = 16x
2×2×bx = 16x
4b = 16
b = 4
b² = 16, but we have only 3, so we need to subtract 16-3 = 13 from the completed square.
so, our equation is
(2x + 4)² - 13 = 0
(2x + 4)² = 13
2x + 4 = sqrt(13)
2x = sqrt(13) - 4
x = sqrt(13)/2 - 2
Answer:
The answer is a= 15
Step-by-step explanation:
First, you multiply both sides by 5. 5*3 = 15 and a/5*5 = a, since 5 and 5 cancels out each other. This is optional, then you flip the equation to get a= 15. Hope this helps.
Answer:
8
Explanation:
Since 30 people have already voted, they need 30 more to vote so that they will have 60 votes. Since Devon got 4 votes the first time we will double that to go to 60 votes which than gives you your solution of 8 answer choice B.
I can answer your first question she can do 5 minutes at the most. If she does 20 per minute, for one is 20, for two minutes is 40, three is 60, four is 80 and five is 100 ft.
Answer:
- 32, 4, 20, and - 36
Step-by-step explanation:
We have to find the product of -4 with 8 / - 1 / - 5 / 9.
Now, the product of - 4 and 8 is = - 32
{Since the product of a positive number and a negative number is always negative}
The product of - 4 and -1 is = 4
{Since the product of two negative numbers is always positive}
The product of - 4 and - 5 is = 20
The product of - 4 and 9 is = -36
(Answer)
