Ratio and Proportion: 200:2 = 20: X (Enter numeric value only.)

Set up the proportion as fractions:

=

First, simplify the left side ratio:

= 30

This means for every 15 units on the left, there are 450 units. To maintain this proportion, the ratio on the right must behave similarly:

30 =

Now, solve for 𝑋X by cross-multiplying:

30⋅𝑋=225

Simplify to find X:

𝑋=​= 7.5

This correct calculation verifies that 𝑋=7.5, matching the proportion given.

Thus, the answer is A. X = 7.5.

Calculate the difference in the cost per gallon between the two prices and then multiply that difference by the number of gallons he purchased.

Difference in cost per gallon:

2.26−2.14=0.12dollarspergallon

Number of gallons purchased:

15.7gallons

Total savings:

0.12×15.7=1.884

Rounding to the nearest cent, the total savings is approximately: $1.88

Therefore, the man saved by going to the less expensive station is: D $1.88

Use the standard conversion scale.

1000 milliliters equal 1 liter.

So, to convert 5000 milliliters to liters:

5000milliliters÷1000=5liters

Thus, there are 5 liters in 5000 milliliters.

To solve the proportion = , use cross-multiplication:

45×105=35×𝑋

Calculate the left side:

45×105=4725

Now set up the equation:

4725=35𝑋

Solve for X by dividing both sides by 35:

𝑋= = 135

Thus, the value of X is 135.