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Kryger [21]
4 years ago
12

Paul and Darry are selling fruit for a school fundraiser. Customers can buy small boxes of grapefruit. Paul sold 5 boxes of grap

efruit and 8 boxes of grapefruit for a total of $115. Darry sold 6 small boxes of grapefruit and 5 large boxes of grapefruit for a total of $92. what is the cost of each of one small box of grapefruit and 5 large box of grapefruit?
solve by using elimination or substitution show all work . cpa2 math

heres the 2 equations i got 5x+8y=115 and 6X+5y=92

please help I have been stuck on this 4 days
Mathematics
2 answers:
Katena32 [7]4 years ago
8 0

Answer:

57

Step-by-step explanation:

5x+8y=115

6x+5y=92

We can either use substitution or elimination.  I prefer elimination

Multiply the first equation by 6  and the second equation by -5 to eliminate x

6(5x+8y)=115*6

30x +48y = 690

The second equation

-5( 6x+5y)=92*-5

-30x -25y =-460

Add the two equations together

30x +48y = 690

-30x -25y =-460

-------------------------

       23y =  230

Divide each side by 23

23y/23 = 230/23

y = 10

Now we need to find x

6x+5y=92

6x+5(10) = 92

6x+50 =92

Subtract 50 from each side

6x +50-50 = 92-50

6x = 42

Divide by 6

6x/6 = 42/6

x = 7

We want to find the cost of 1  small grapefruit and  5 large grapefruit

x +5y

7 + 5(10)

7+50

57

const2013 [10]4 years ago
7 0

Answer:

Step-by-step explanation:

Alright, lets gets started.

If x is the price of small box and y is the price of large box.

You have made both equations, absolutely correct.

5x+8y=115       .................. equation (1)

6x+5y=92      .................... equation (2)

Multiplying by 5 in equation (1) and multiplying by 8 in equation (2)

25x+40y=575   .................. equation (3)

48x+40y=736    ................... equation (4)

Subtracting equation 4 and equation (3)

48x-25x=736-575

23x=161

x=7

Plugging the value of x in equation (1)

5*7+8y=115

35+8y=115

8y=115-35

8y=80

y=10

So, cost of 5 large box of fruit = 5y = 5*10=50

one small box of grapefruit and 5 large box of grapefruit will be = 7+50=57

So, cost of each of one small box of grapefruit and 5 large box of grapefruit is $ 57.    :   Answer

Hope it will help :)



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