Is 3/7 bigger then 3/5
2 answers:
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Answer: y = 7.5
Step-by-step explanation:
Suppose that y varies directly with x
That is, y∝x
Convert y∝x to a full equation by introducing a constant k to the right hand side.
Therefore, y = kx
Given that y = 10 and x = 20
Substitute y and x in the equation above. We have;
10 = k(20)
10 = 20k
20k = 10
k = 10/20
k = 0.5
Since k = 0.5, the equation y = kx becomes y = 0.5x
Now, to find y if x = 15, substitute x in equation y = 0.5x
Therefore, y = 0.5(15)
y = 7.5
Answer:
Jessica had 32 candies at the beginning.
Step-by-step explanation:
Let the number of candies Jessica had at the beginning be .
Candies gives to Judy = .
Now, candies left with Jessica is .
Candies given to Reggie is of
.
∴ Candies with Reggie is .
Candies left with Jessica after giving to Reggie = .
Now, Jessica lost 75% of what she had left. So, 75% of .
∴ Candies lost =
Now, candies left with Jessica = .
As per question,
Candies left with Jessica at last is 4. So,
Hence, Jessica had 32 candies at the beginning.