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:
A
Step-by-step explanation:
Just plug in -4 everywhere you see an x:
f(x) = 2x + 7
f(-4) = 2(-4) + 7
f(-4) = -8 + 7
f(-4) = -1
Positive Integer factors of 43904 = 2, 4, 8, 16, 32, 64, 128, 7, 896, 6272, 43904 divided by 2, 2, 2, 2, 2, 2, 2, 7, 7, 7, gives no remainder.