The water level in Rafael's fish tank must be at least 11 in. for his fish to be healthy. He starts with a water level of 11 in. Then the water level
decreases in. Rafael adds water, but not enough for the fish to be healthy.
How many inches of water could Rafael have added? Show your work.

expression #3 is not equivalent. the others are.

35 is an outlier

step-by-step explanation:

a) at most means it can cost $12 or less

so the inequality sign would be ≤

you would then need to multiply the number of toppings by the 0.35 for each one and add it to the cost of the cheese pizza.

the equation would be 9.99 + 0.35x ≤ 12

b) using the above equation:

9.99 + 0.35x ≤ 12

subtract 9.99 from each side:

0.35x ≤2.01

divide both sides by 0.35:

x ≤ 2.01 / 0.35

x ≤5.74

at most you could have 5 toppings.

the 5 topping pizza would cost: 0.35 x 5 = 1.75 + 9.99 = $11.74