So, the absolute value of a negative number and the same number in positive terms is the same.
<span>Imagine a number line with zero in the middle, and numbers stretching out negative on one side and positive on the other. Measure out "3" on your number line in each direction. So, -3 and 3.
</span>
The absolute value of each of those — its distance from zero — is the same.
Does that make sense?
The system of equations is:
x = 2y
x*$10 + y*8 = $84
Solving it, we see that he worked 3 hours landscaping and 6 hours washing cars.
<h3>
How to write the system of equations?</h3>
First, we need to define the variables:
- x = number of hours washing cars.
- y = number of hours landscaping.
We know that Alexander worked twice as many hours washing cars as he worked hours landscaping, then:
x = 2y
We also know that he earned a total of $84, then:
x*$10 + y*8 = $84
So the system of equations is:
x = 2y
x*$10 + y*8 = $84
To solve it, we just replace the first equation into the second one:
(2y)*$10 + y*8 = $84
y*$28 = $84
y = $84/$28 = 3
So He worked 3 hours landscaping, and:
x = 2*y = 2*3 = 6
6 hours washing cars.
If you want to learn more about systems of equations:
brainly.com/question/13729904
#SPJ1
Answer:
fondo
Step-by-step explanation:
A is the corect answer they congruent.
Answer:
its correct there adding to or subtracting 2 each time.
Step-by-step explanation:
