354.9/9.1=39
So. elaine averaged 39 miles per gallon
Do u have a pic of the problem?
Answer:
i think D or B is the answer
Step-by-step explanation:
The answer is B. Testing random samples of wild animals to decide whether they are healthy
Answer:
x is mL of 25% acid and y is mL of 50% acid
We set up 2 equations:
A) x + y = 250
B) .25 x + .50y = .35 * 250 which equals
B) .25x + .50y = 87.50 Multiplying A) by -.5
A) -.5x -.5y = -125 adding the equations we get
-.25x = -37.50
x = 150 mL
y = 100 mL
Source: http://www.1728.org/mixture.htm
Step-by-step explanation: