Brother one: x
Brother two: x + 15
---
Make them add up to 55 in an equation.
x + (x + 15) = 55
Combine like terms.
2x + 15 = 55
Subtract 15 from both sides.
2x = 40
Divide both sides by 2.
x = 20
Plug 20 for x into brother two.
(20) + 15 = 35
Brother one has saved $20, brother two has saved $35.
Yes his equations are correct
The equation for a line is y=mx+b
m is the slope, so when a line is perpendicular to another line is has a slope which is an opposite reciprocal, so change the -1/2 (the slope of the other line) to 2/1 or just 2
so m=2
now you need to plug in the point they give you for x and y
y=mx+b
4=2(4) + b
simplify
4=8 + b
subtract 8 over
-4 = b
now that you know that slope (m) and the y-intercept (b) you can plug those two numbers into the original equation for the answer
y= 2x -4
Answer:
y = 38800 + 0.14x
Step-by-step explanation:
Rodrigo is a salesman who earned a base pay of $38800 and a commission of 14% for each book set he sold.
If Rodrigo sells one set of books he earns the commission of 0.14
So on the sales of x sets of books Rodrigo will earn commission of 0.14x
Therefore, Rodrigo's total pay will be y = Basic pay + commission
y = 38800 + 0.14x is the equation representing total pay of Rodrigo's.