Kenny ordered guitar strings for glenn’s guitar shop. the premium guitar strings are $4.50 apiece. the standard guitar strings are $1.50 apiece. the bill smeared in the rain, but kenny knows he ordered a total of 80 strings for $225.

Kenny ordered 45 standard guitar strings and 35 premium gutar strings.

Step-by-step explanation:

I think the question refers to how many strings of each kind he bought.

Let

x = number of standard guitar strings

y = number of premium gutar strings

The sum of x times their individual cost and y times their individual cost is equal to the global cost.

1.50x + 4.50y = 225 [1]

The sum of x and y is equal to the total number of strings.

x + y = 80

x = 80 - y [2]

Let's replace [2] in [1],

1.50.(80-y) + 4.50y = 225

120 - 1.50y + 4.50y = 225

- 1.50y + 4.50y = 225 -120

3.00y=105

y = 35

If we replace y = 35 in [2], we get

x = 80 - 35 = 45

Kenny ordered 45 standard guitar strings and 35 premium gutar strings.

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70