If 5 liters cost $2.50, then how much would it cost for 9 liters?

$4.50

Step-by-step explanation:

To solve a problem like this one, we can use the simple ratio method to find the cost for 9 liters, here in this case.

We know that, 5 liters (of something) cost $2.50. So to find the cost for 9 liters, we can assume its cost to be x and can write it as:

Now solving for x to get:

Therefore, 9 liters would cost $4.50.

Perimeter = 30 units

m<BCD = 53°

Step-by-step explanation:

Recall: in any parallelogram, consecutive angles are supplementary. Also, the pairs of parallel sides are equal in length.

We would use this knowledge to solve the problem given.

m<ABC = 127° (given)

BC = 10 units

AB = 5 units

✔️Perimeter of the parallelogram = AB + BC + CD + AD

AB = CD = 5 units (pair of parallel sides)

BC = AD = 10 units (pair of parallel sides)

Perimeter = 5 + 10 + 5 + 10

Perimeter = 30 units

✔️m<BCD = 180° - m<ABC (consecutive angles are supplementary)

m<BCD = 180° - 127° (Substitution)

m<BCD = 53°