Answer:
-11
Step-by-step explanation:
I believe this is it
Answer: p = -2w + 20
<u>Step-by-step explanation:</u>
If the student had 20 pencils but now has 18 pencils, he uses pencils at a rate of 2 per week. So, m = -2 (negative because he is decreasing the amount of pencils). The student started with 20 pencils so b = 20
Use the y = mx + b but replace "y" with "p" and replace "x" with "w" and input the m and b as stated above:
p = -2w + 20
The answer is no solution.
Explanation:
Because of pemdas, first, solve the parentheses. It becomes 4.2x + 3, as multiplying by 0.5 caused the same effect as if you were to divide by 2. Now if you look at the problem, it is just 4.2x - 3 = 4.2x + 3. Even though the symbols are different, they are still equal to eachother.
3(x-1)-2•(2x+1)=8(x-1)
3x-3-4x+2=8x-8
3x-3-4x+2-8x+8=0
-9x+7=0
-9x=-7
x= 7/9