Answer: He bought 1 magazine and 3 comic books.
Step-by-step explanation: If comic books cost $1 and magazines cost $3, the equation for the problem should look like this: 2(m) + 1(c) = 5, since you know that the brother spent $5 in total. "m" represents the number of magazines purchased while "c" represents the number of comic books purchased. If you plug in 1 for "m" and 3 for "c", the equation would be true and would equal a total of $5. Also, 1 magazine and 3 comic books would mean that the little brother did, in fact, purchase 4 items.
Answer:
Step-by-step explanation:
Using this exponential growth equation we can get an equation that models the situation.
A= Principal Amount
R= Rate of Growth
T= Amount of time
42 x 28 = (40 + 2) x (20 + 8) = 40 x 20 + 40 x 8 + 2 x 20 + 2 x 8
= 800 + 320 + 40 + 16
Step-by-step explanation:
8/24 = 21/63 = 1/3
yes it's a proportion
Answer: 80th percentile
Step-by-step explanation:
There were 19 competitors below him and 5 competitors above him.
Total number of competitors is:
= 19 + 5 + Shawnte
= 25 competitors
Out of these 25 competitors, Shawnte took the 20th position.
Percentile is:
= 20/25 * 100
= 80th percentile