Answer:
Ettienes error was in step 2 .
Step-by-step explanation:
Khan academy
Answer:
8 calculators at most.
Step-by-step explanation:
Let x represent number of calculators.
We have been given that each calculator costs $15. So the cost of x calculators would be 
dollars.
Since the order must be less than $125 in order to not go over budget, so cost of x calculators should be less than or equal to 125. We can represent this information in an inequality as:
Therefore, our required inequality would be .
Let us divide both sides of inequality by 15 as:
Since we cannot order 0.33 of a calculator, therefore, the math club can order 8 calculators at most.
Answer:
D: r=1/2 sqrt(P/πI)
Step-by-step explanation:
P=4πIr²
We want to solve the equation for r
First divide each side of the equation by 4πI
P/4πI =4πIr²/4πI
P/4πI =r²
Then we need to take the square root of each side. Normally we would take the ± square root, but distance cannot be negative.
sqrt(P/4πI) = sqrt(r²)
sqrt(P/4πI) = r
Notice that there is a 4 in the denominator. sqrt(4) = 2
sqrt(P/πI)* 1/sqrt(4) = r
sqrt(P/πI)* 1/2 = r
1/2 sqrt(P/πI) = r
If you meant x * 2 = 98 and solve for x...
Divide each side by 2 and you get, "x = 49"
If you meant x^2 = 98 and solve for x...
Square root each side and you get, "x = 9.899..." but since you asked an answer that needed to be rounded to the nearest tenth, it'd be 9.9.
Kelly traveled 50 miles with 20 gallons, 50/20 = 2.5 miles per gallon
Andy traveled 78.75 miles with 15 gallons, 78.75 / 15 = 5.25 miles per gallon
Rick traveled at 4.8 gallons per mile
Andy traveled furthest.
