Answer:
+/- 9i
Step-by-step explanation:
+/- sqrt(-81) = +/- sqrt(-1) × sqrt(81)
= +/- 9i
A 30-foot-long support wire for a 16-foot high streetlight runs from the top corner of a building to a point on the ground, forming a straight line. The length of the wire from the top of the building to the top of the street light is 6 feet. How tall is the building?
I think the answer is 20 ft
Complete Question
The complete question is shown on the first uploaded image
Answer:
The first option is the correct option
Step-by-step explanation:
From the question w are told that
The value of shares for A&D in 2 years is 
$150
The value of share for peer comms Ltd is 
$275
The number of more share that you can buy fro A&D compared to peers comms Ltd is
$125
Answer:
Step-by-step explanation:
(8x - 7)(
The x^2 term has to come out to 8x^2.
The 8 is already there.
So your first term in the second factor is x.
(8x - 7) ( x
Now the question is what is the sign after the x. Since the question shows +7 the only way that can happen is if both signs in the factors are the same.
Since (8x - 7) has been given to you and you need 7 to come out plus, then the sign after x must minus. Both signs must be the same.
(8x - 7)(x -
Last, what comes after the minus sign? You already have a minus 7 so you need something to multiply by 7 to get seven.
That should be a one.
(8x - 7)(x - 1)
x - 1 is you answer. I leave you to check the middle term. It is - 15
