A sparkling-water distributor wants to make up 200 gal of sparkling water to sell for $ 5.00 per gallon. She wishes to mix three grades of water selling for $10.00, $1.00, and $4.50 per gallon, respectively. She must use twice as much of the $4.50 water as the $ 1.00 comma water. How many gallons of each should she use?

x=50

y=50

z=100

Step-by-step explanation:

Let x = $10

y = $1

z = $4.5

2y=z

5 * 200 = 1000 Dollars wanted

1000 = 10x + y + 4.5z

variables represent number of gallons of each type

1000 = 10x + y + 4.5(2y)      sub z for y

x=50

y=50

z=100

b. 13

step-by-step explanation:

as there are 13 students in bowling class therefore the most reasonable answer is b as only 13 students are in the bowling class.

-14 is the answer

hope this : ))