Answer:
line 2
Step-by-step explanation:
#1 You got it right
When a you add a number you need to add to both sides
So line 2 was an error because it only added on the left side, not right side
Answer:If they have the same length or if their parallel but that’s not always the case.
Step-by-step explanation:
Answer:
x=-7
Step-by-step explanation:
so if you multiply two negative numbers you get a positive and and -7 * -3 is just doing 3*7 which is 21 and that is the answer to -3*-7 and 21 minus 5 is 16 so there´s that and hope this helps
Answer:
The numbers are 20 and 140
Step-by-step explanation:
<u><em>The question in English is</em></u>
Find 2 numbers knowing that the second number is 7 times greater than the first, and the sum between the double of the first number and the triple of the second is 460
Define the variables
Let
x ----> the first number
y ----> the second number
we know that
-----> equation A
----> equation B
Solve the system of equations by substitution
Substitute equation A in equation B
![2x+3(7x)=460](https://tex.z-dn.net/?f=2x%2B3%287x%29%3D460)
solve for x
![2x+21x=460](https://tex.z-dn.net/?f=2x%2B21x%3D460)
![23x=460](https://tex.z-dn.net/?f=23x%3D460)
![x=20](https://tex.z-dn.net/?f=x%3D20)
<em>Find the value of y</em>
---->
The numbers are 20 and 140
1) $450/12=$37.50
2)$37.50x3=$112.50
The answer is: $112.50
I hope this helps