Answer:
Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
given that r varies jointly with x and y then the equation relating them is
r = kxy ← k is the constant of variation
To find k use the condition r = 15 when x = 3 and y = 4
k = = = 1.25
r = 1.25xy ← equation of variation
When x = 16 and y = 1.25, then
r = 1.25 × 16 × 1.25 = 25
The total would be $14.77
because we will do 0.15x12.84 which is 14.766 but since this is money we round to the nearest hundredth , and that is $14.77
Answer:
Step-by-step explanation:
Total amount of Money saved by Manny is $150. He wants to buy a digital player with it.
The digital music player costs $89, and each song costs $0.99. Let x represent the number of songs that he can afford. This means that the cost of x songs would be
89 + 0.99x
If Manny spends no more than $150, before tax, the number of songs that he can buy will be
89 + 0.99x = 150
0.99x = 150 - 89 = 61
x = 61/0.99 = 61.6
He can buy 61 songs