2. The cost c in dollars) to rent a bicycle is proportional to the number h of lol
hours that you rent the bicycle. It costs $20 to rent the bicycle for 4 hours.
a. Write an equation that represents the situation.
b. Interpret the slope.
c. How much does it cost to rent the bicycle for 6 hours?

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

191 students play sports and ninety-seven 10th graders were surveyed.

step-by-step explanation:

answer: 7

step-by-step explanation:

26 is 33.33% of 78

step-by-step explanation:

26 is what percent of 78?

26 is p% of 78

equation: y = p% * x

solving our equation for p

p% = y/x

p% = 26/78

p = 0.3333

convert decimal to percent:

p% = 0.3333 * 100 = 33.33%