Answer:
A
Step-by-step explanation:
y=4x+6
y=6-4x
y=12
y=4x+6
12=4x+6
12-6=4x
6/4=4x/4
x=3/2
Answer:
a=6
b=10.39
Step-by-step explanation:
a=sin 30x12 or a=cos60x12
a=6
b=cos 30x12 or b=sin60x12
b=10.39
Answer:
Plan A last 0.75 hours or 45 minutes.
Plan B last 1.5 hours or 90 minutes.
Step-by-step explanation:
Let 
be the number of hours that the plan A last, an 
the number of hours of plan B. Then for the Wednesday you have:
And for the Thursday is:
Multiply the equation of Wednesday by -3:
Using the method of addition using this last equation and the equation of Thursday
Replacing the value of in one of the equations
Answer:
c
Step-by-step explanation:
or b because you are dividing I think 90 to 50 and 12
Answer:
63°
Step-by-step explanation:
complementary angLe is two Angles add up to 90°
Let x be the other angle
x+27°=90°
x+27°-27°=90°-27°
x=63°
