Mathematics: The price of an online Maths website subscription is increased by 31% and now is $189.95. Find the original price. Thanks :)

The price of an online Maths website subscription

michellerosas

31.03.2021

○=> Correct answer :

The original price of the subscription = $\color{plum}\boxed{\color{hotpink}\bold{\$145}}$

○=> Steps to derive correct answer :

Given :

▪︎Percentage of increase in the price of an online maths website subscription=31%

▪︎Price of the subscription after the increase = $189.95

Let the original price of the subscription be x.

Which means :

$=\tt x + 31\% \: of \: x = 189.95$

$=\tt \frac{x}{1} + \frac{31}{100} \times x = 189.95$

$=\tt \frac{x}{1} + \frac{31x}{100} = 189.95$

$=\tt \frac{131x}{100} = 189.95$

$= \tt131x = 189.95 \times 100$

$=\tt 131x = 18995$

$=\tt x = \frac{18995}{131}$

$\hookrightarrow \tt \color{plum}x = \$145$

Therefore, the original price of the subscription = $145

0,0(0 оценок)

savannah647

21.12.2020

The roots (zeros) are the x values where the graph intersects the x-axis. To find the roots (zeros), replace f(x) with 0 and solve for x. = (−∞,∞)

Step-by-step explanation:

0,0(0 оценок)