Answer:
i think it would be 21 percent he got wrong so if he got 21 percent wrong it would be 79 percent right
Step-by-step explanation:
beacause if it was 10 question it would be 30 percent wrong since its 15 you divide it by 100 which would be 7 and 7 times 3 is 21
sorry if im wrong
Answer:
4
Step-by-step explanation:
2x-2/5=4
2x= 4+(2/5)
2x= 4/5+20/5
x=(22/5)/2
x= 22/10 or 11/5
check:
2(11/5)-2/5=(22/5)-(2/5)
=20/5
=4
Answer:
2. 1080
3. 56
4. $1665
Step-by-step explanation:
2. 1080 (/6), 180 (/6), 30 (/6), 5
3. 4(6 + 8) = 4 x 14 = 56
4. $75 + 30(53) = $75 + 1590 = $1665
Answer:
k = 10
Step-by-step explanation:
We first have to get the 3rd angle: 180 - 115 = 65
Sum of angles in a triangle = 180
65 + (4k + 5) + (6k + 10) = 180
Collect like terms
65 + 10k + 15 = 180
80 + 10k = 180
Subtract 80 from both sides
10k = 100
Divide both sides by 10
k = 10
