Question

the local hardware store wants to increase their inventory. Last year 15 electric screwdrivers cost them 300.how much would 45 screwdrivers cost

Answer 1

To find the cost of 45 screwdrivers, set up a proportion and solve for x.

Step-by-step explanation:

To find the cost of 45 screwdrivers, we can set up a proportion using the given information. Let's assume that the cost is directly proportional to the number of screwdrivers. We can set up the proportion as:

15 screwdrivers / $300 = 45 screwdrivers / x

To solve for x, we can cross multiply and solve for x:

15x = 45 * $300

x = 45 * $300 / 15

Calculating this, we find that the cost of 45 screwdrivers would be $900.

Answer 2

One way of doing this is to write the equation of ratios (15 screwdrivers / 45 screwdrivers) = ($300 / x). Solve this equation for x. To do this, you might try multiplying both sides of this equation by x to eliminate fractions.

Another way is to obtain the unit cost of each screwdriver and then multiply the result by 45 screwdrivers.