Correct answers only !
mark has the following averages in his amdm math class:
homework: 95
quiz average: 80
test average: 67
final exam: 60
if the teachers weights homework at 10%, quizzes at 20%, tests at 50%, and final exam at 20%, what is marks class average?
a. 61%
b. 71%
c. 74%
d. 82%

I tried it several times and the answer I came up with was 62%

Step-by-step explanation:

95 x 10% = 9.5

80 x 20% = 16

67 x 50% = 33.5

60 x 20% = 12

9.5+16+33.5+12=71

So it's 61%.

I don't think any of those answers are correct. :(

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10