As a club fundraiser, a group of students washed 40 cars one weekend, they washed 70 cars. what was the percent increase in the numbers of cars washed

Percent increase in the numbers of cars washed is 75%

Step-by-step explanation:

Given:

Number of cars washed in First weekend by the students =40 cars

Number of  cars washed in second weekend  by the students= 70 cars

To Find:

Percentage of increase in the number of car washed=?

Solution:

we know that

Percentage Increase=Final Value−Starting Value|Starting Value  x 100

According to our question

Substituting the values,

percentage of increase in the cars =

percentage of increase in the cars =

percentage of increase in the cars =

percentage of increase in the cars =75

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0

236 cm 16 time 12 = 192

6 times 7 = 42

192+42