Answer:
a) 1.25
b) 9.38 (exact calculation 9.375)
c) 0.03 (exact calculation 0.025)
Step-by-step explanation:
a) divide 6.25 by 5
b) multiply 1.25 ( the cost for 100 ) by 7.5
c) Divide 6.25 ( cost for 500 ) by 250
11.
Every handshake takes 2. If no one shakes hands twice with another, there are 10+1 total people shaking hands (11).
Name them 1 thru 11. Make a line and 11 goes down the line and shakes 10 hands and then leaves. 10 then shakes 9 hands and leaves. 8 then shakes 7 hands and leaves. Etc. 2 shakes hands with 1 and leaves. 1 just leaves.
11— 10 hs
10— 9 hs
9— 8 hs
8— 7 hs
7— 6 hs
6— 5 hs
5— 4 hs
4— 3 hs
3— 2 hs
2— 1 hs
1— leaves
Total handshakes 55, total people 11.
Answer:
1. x+4x
2. 5x
3. 
4. 4x-2x+15
5. 
Step-by-step explanation:
To write expressions remember these key words:
- a number is a variable like x
- sum is +
- difference and subtracted is -
- quotient is ÷
- product is ×
- reciprocal means flip like
- square is an exponent of 2 like
1. x+4x
2. 5x
3.
Remember a quotient would be 
but the reciprocal is 
.
4. 4x-2x+15
5.
Answer:
x=+12
Step-by-step explanation:
4(x+6)=6x=16
We move all terms to the left:
4(x+6)-(6x)=0
We add all the numbers together, and all the variables
-6x+4(x+6)=0
We multiply parentheses
-6x+4x+24=0
We add all the numbers together, and all the variables
-2x+24=0
We move all terms containing x to the left, all other terms to the right
-2x=-24
x=-24/-2
