Answer:
15) 30
16) 2
for 15 you plug the -4 into the variable (x)
so...
-4(-4)-4-2-5(-4)
you do multiplication first because of PEMDAS
so -4×-4=16 it is not negative because there 2 negatives so they cancel out
then -5×-4=20
then you get this:
16-4-2+20 which equals 30
then with 16 you do the same. you just put the number for y in the variable y and same with x
The answer is 7x-3 if you add like terms which are 4x, 2x, and x then take 2, 3, -2 and subtract from each other
Here you will find the answer.
Link:https://www.symbolab.com/solver/step-by-step/-x-8y%3D2%20and%20x-5y%3D-15
Third answer, or c. (b+8>or equal to 12.4)
Answer:
meters
Step-by-step explanation:
Let's take climbing down as "negative" and climbing up as "positive". Now, we can simply use the numbers and signs to find the change in elevation.
meters down means 
meters up means 
So, now we have: 
<u>Eric's elevation changed 
meters above. So after the 2 moves, he is up by meters.</u>
