Vanessa receives $7.50 each week for allowance. Which equation can be used to find the number of weeks Vanessa must save her allowance in order to buy a bicycle that costs $90?

a. 7.50x = 90

b. 7.50 + x = 90

c. x/90 = 7.50

d. x/7.50 = 90

it is A.

A :)

a. 7.50x = 90

To find the equation that can be used to find the number of weeks Vanessa must save her allowance in order to buy a bicycle that costs $90, we need to set up an equation where the amount she saves per week is multiplied by the number of weeks, resulting in the total cost of the bicycle.

Let's break it down step by step:

1. We know that Vanessa receives $7.50 each week for allowance, and she needs to save this amount for a certain number of weeks to reach the cost of $90.

2. Let's represent the number of weeks she needs to save as 'x'.

3. The amount of money saved per week is $7.50.

4. The total cost of the bicycle is $90.

So, the equation that represents this situation is:

7.50x = 90 // Option a

Thus, the correct answer is option a.