Answer:
C. x²+3x-28
Step-by-step explanation:
f(x) = x +7
g(x) = x -4
f(x) · g(x) = (x-4)(x+7)
= x²+7x-4x-28
= x²+3x-28
Solve the top equation for x
2x-2y=20
Divide everything by 2
x-y=-10
Get x by itself
x=-10+y
Then plug x into the other equation
-2(-10+y)+4(-10+y)=14
Solve new equation and you get y=-3
Plug y back into either equation
-2x+4(-3)=14
Solve and you get x=-13
So your answer will be
(x,y) = (-13,-3)
Answer:
The second choice is correct
Step-by-step explanation:
Here, we want to get the correct statement
As can be seen, while 2 is the angle at the circumference, 1 is the angle at the center
Mathematically, we know that angle at the center is two times the angle at the circumference
Thus,
m1 = 1/2 (m2)
or m2 = 2 * m1
For this, simply use the rules of logs:
- Adding logs of the same base (which is 7 here) is the same as multiplying
-Subtracting logs of the same base is dividing
So the single log would be:
log₇(x*y/z) which is the same as
log₇(xy/z)