Solve equations with variables on both sides.

Let's use "m" to represent miles and "C" to represent the total cost for one week.

Car Rental: $0.25 is a rate.. (dollars per mile) so it get's multiplied by miles to give dollars. We are going to just look at 1 week to not introduce any more variables. Thus the $240 per week is multiplied by 1 essentially just leaving the amount.

C = 240 + 0.25m

Minivan Rental: Again, $0.40 per mile is the rate to multiple by miles. Only looking at 1 week, so the $180 is a fee.

C = 180 + 0.40m

** Set the cost equations equal to each other and solve for miles.

240 + 0.25m = 180 + 0.40m

240 - 180 = 0.40m - 0.25m

60 = 0.15m

60/0.15 = m

400 miles in one week, the cost will be the same.

- Same thing for problem #7. Let's make "h" represent hours

Smith family

C = 289 + 16.50h

Jackson family

C = 274.60 + 18.75h

- Set equal and solve for hours.

289 + 16.50h = 274.60 + 18.75h

289 - 274.60 = 18.75h - 16.50h

14.40 = 2.25h

6.4 hours

the answer is x equals 50, this is because the two angles are the same measurements because they are vertical angles. in corresponding angles, vertical angles are two angles with one diagonally above another. those two angles will be the same measurements.

110 - 10 = 100

100 / 2 = 50

x   = 50

110 = 2(50) + 10 = 110

110 = 110

can u give brainliest if i'm correct?

phosphate, calcium ion, chloride ion, neon atom

step-by-step explanation: