What is the decimal multiplier to decrease by 78%?

0.22

Step-by-step explanation:

Let assume the number to be reduced be 100

Reducing it by 78% will be:

100 - ( 78% of 100 )

100 - (78/100)×100

100 - 0.78 × 100

100 - 78 = 22

Since the answer is 22. Hence,

22/100 will be the multiplier

0.22 × 100 = 22

kaypeeoh72z and 11 more users found this

Step-by-step explanation:

answer

you start with $5 and save $10 a week until you have at least $45wer

step-by-step explanation:

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240