HELP HELP HELP 1) If y = −x − 7, then y = −x − 7? That is, can you replace y with −x − 7? Why?

2) Since you know that = −x − 7 and in the second equation with −x − 7, Can you replace the higher equation? Why?

3) Once you replace the of the second equation with, you have an equation with only one variable, like the one below. This is called substitution because what you do is substitute (replace)
with an expression of equal value. Solve this new equation to find use that result to find in any of the original equations.

PLEASE I NEED THIS

l.ln.lln.k.nkl

step-by-step explanation:

51-50

step-by-step explanation:

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )