145. 7 + 8 is 15 carry the 1, 9+4+1 is 14, so 145
Y varies directly with x m eans
y=kx where k is constant
y=40
x=16
find k
40=k16
divide both sides by 16
5/2=k
y=5/2x
y=-5 find x
-5=5/2x
times 2/5 both sides to cancle fraciton (5/2 times 2/5=10/10=1)
-10/5=x
-2=x
x=-2
Answer:
B. a decrease in their water bill of $3.16.
Step-by-step explanation:
Monthly service charge =$10.10
Volume charge = $1.58 for every 100 cubic feet of water.
Total monthly cost = 1.58x + 10.10
If the Johnson family used 
less water this month than last month, then they can expect a reduction in their bill by the Volume charge for .
Volume Charge per 
of water = $1.58
Therefore: Volume Charge for of water = 2 X $1.58=$3.16
Therefore, the Johnson family can expect a decrease in their water bill of $3.16.
This could be a hexagonal prism but a little bit of tricky one. Though hexagonal prism has 8 regions, the 6 sides and the bottom and top but it does have 6 congruent rectangular regions.
Answer:
C. When the equations -10x + 5y = -60 and -3x − 5y = -5 are added together, a third linear equation, -13x = -65, is formed, and it shares a common solution with the original equations.
Step-by-step explanation:
2x-y=12
-3x-5y=-5
multiply the first equation by -5
-10x +5y = -60
add the 2 equations together
-3x-5y=-5
-10x +5y = -60
-------------------------
-13x = -65
We use the addition property of equality which says adding the same thing to both sides, doesn't change the equation, so we will get the same answer as the original equation
