Whenever a problem says "one number" and "another number" we can substitute x and y. for this we have x=2y+1 and xy=1. since we know the value of x (2y+1) we can substitute it for the other equation to get (2y+1)y=10. simplify to get 2y^2+y=10. from here you can do a few methods to solve this, but the simplest in my opinion is by factoring.
In order to factor it must be equal to 0, so we have 2y^2+y-10=0. We factor this and get y=5 (we also get y=-4 but it is an extraneous root). now we can plug that into either equation and find that x=2.
this means our two numbers are 5 and 2
Answer:17
Step-by-step explanation: You just follow the steps.
Well if the increase is 135% then
actual price=85
135% of actual price=114.75
new price
= actual price + increased price
= 85+114.75
=119.75
Answer:
she needs $4.52
Step-by-step explanation:
(9.5*5.50)+x=56.77
52.25+x=56.77
x=56.77-52.25
x=4.52
Answer:
Step-by-step explanation:
Let x be the original price.
( 1 - 20% ) x = 23.2
