He maybe accidently added both of thm .
But if we difference we get 7.
Because - and - =+
So
-11+4=7.
Answer: 7 rows
Step-by-step explanation:
she will have 7 rows with 4 seats in each row or 4 rows with 7 seats in each row
Answer:
x ≈ 9.5
Step-by-step explanation:
using the cosine ratio in the right triangle
cos19° = = ( multiply both sides by 10 )
10 × cos19° = x , then
x ≈ 9.5 ( to the nearest tenth )
Answer: 15:25
Step-by-step explanation: the number of people is 15 and the area would be 25
Answer:
5 quarters
Step-by-step explanation:
x = number of quarters
17 - x = number of half dollars {there are 17 total coins}
0.25x + 0.5(17 - x) = 7.25 {value of coin times number of coins equals total value}
0.25x + 8.5 - 0.5x = 7.25 {used distributive property}
-0.25x + 8.5 = 7.25 {combined like terms}
-0.25x = -1.25 {subtracted 8.5 from each side}
x = 5 quarters {divided each side by -0.25}
17 - x = 12 half dollars {substituted 5, in for x, into 17 - x}
5 quarters