The answer is 29.03%. because there are 2 people who are 15-19 and there are 7 people between 20-24. 7+2=9. and there are a total of 31 people. so 9 out 31 as a percent is 29.03%. hope this helps. please give me a brainliest
Answer:
9.6 mL
Step-by-step explanation:
If x is mL of chemical X, and y is mL of chemical Y, then:
x + y = 16
0.05x + 0.09y = 0.074(16)
Solve the system of equations using substitution.
0.05(16 − y) + 0.09y = 0.074(16)
0.8 − 0.05y + 0.09y = 1.184
0.04y = 0.384
y = 9.6
You need 9.6 mL of Y.
Answer:
x=2
Step-by-step explanation:
subtract 7/9x -4/9x
3/9x= 1/4 +5/12
first change 1/4 to 3/12
then add 3/12 + 5/12
3/9x = 8/12
change 3/9x to 1/3x then to 4/12x
4/12x = 8/12
then mulitiply by the reciprical 12/4 on both sides
x = 2