Answer:
D. It has a single solution: x=-3, y= 26.
Step-by-step explanation:
3x + y=17
Subtract 3x so it is in y=mx+b form. So now it is y= -3x +17
Now plug in
x + 2 (-3x+17) = 49
x + -6x + 34 = 49 (distribute)
-5x = 15 (combine the x terms and subtract 34 on both sides)
x = -3 (divide -5 on both sides to get x alone)
now plug in x into any other equation to get y
x + 2y = 49
-3 + 2y = 49
2y = 52 (add 3 on both sides)
y = 17 (divide 2 on both sides to get y alone)
(-3, 26)
Answer:
c = 20d + 15
Step-by-step explanation:
answer choices may help if the answer is not one of the choices; but here is the answer that it should be:
20 dollars per day is 20 times the length of rental.
15 is a cost that is added and does not change.
c = the total cost therefore:
c = 20d + 15
Answer:
-35
Step-by-step explanation:
Since there are parentheses, you start with that. 3+4=7
Now, -5 x 7 =-35
B.
if you plug in the points you get for the first one
3(3) - (4/(-8)) = 9+2 = 11
and the second
3(4) - (4/4) = 12-1 = 11
Compare given polynomial
with quadratic polynomial
, we get:
a=25, b=15, c=-4
Step1: find product of a and c which is 25*-4= -100
Step2: find two numbers whose product is ac and sum is b that is product is -100 and sum is 15
We see that 20 and -5 satisfy condition of step2.
Step3: Break middle term of
into two parts -100x and +15x then proceed factor by grouping.




Hence final answer is
.