SOLUTION: Solve for z 1) –4 + 5z – 16 = 20 2) 2/25 × 50z + 640 = 20z 3)Use the following formula to answer the following four problems M = 2\7 G + 64

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: Solve for z 1) –4 + 5z – 16 = 20 2) 2/25 × 50z + 640 = 20z 3)Use the following formula to answer the following four problems M = 2\7 G + 64      Log On


   

Question 784565: Solve for z
1) –4 + 5z – 16 = 20
2) 2/25 × 50z + 640 = 20z

3)Use the following formula to answer the following four problems
M = 2\7 G + 64
If M= –22, what is G?
If M = 88, what is G?
I really appreciate your help!
Thanks
Sara


Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
1) -4+%2B+5z+-+16+=+20 --> 5z=20%2B4%2B16 --> 5z=40 --> z=40%2F5 --> highlight%28z=8%29

2) %282%2F25%29%2A+50z+%2B+640+=+20z --> %282%2A50%2F25%29z%2B+640+=+20z --> 4z%2B+640+=+20z --> 640+=+20z-4z --> 640+=+16z --> 640%2F16+=+z --> highlight%28z=40%29
3) M+=+%282%2F7%29G+%2B+64
If M=-22 ,
-22=%282%2F7%29G+%2B+64 --> -22-64=%282%2F7%29G --> -86=%282%2F7%29G --> -86%2A7=7%282%2F7%29G --> -86%2A7=2G --> G=-86%2A7%2F2 --> highlight%28G=-301%29
If M=88 ,
88=%282%2F7%29G+%2B+64 --> 88-64=%282%2F7%29G --> 24=%282%2F7%29G --> 24%2A7=2G --> G=24%2A7%2F2 --> highlight%28G=84%29