7+3x≤8(3+x) perform indicated multiplication on right side
7+3x≤24+8x subtract 8x from both sides
7-5x≤24 subtract 7 from both sides
-5x≤17 divide both sides by -5 (and reverse direction of inequality sign because of multiplication/division by a negative value)
x≥-17/5
x≥ -3.4
Plug in x with -1

A negative number in parenthesis times an exponent is always positive.
8+3-7=4
Both are the same because the first line is going by ×2 so the missing number would be 22. The second line is going by +1 so 21+1=22. (Hope this will prove your friend wrong :3)
It should be the third one down.
Answer:
1. Identify problem 2. Identify plan 3. what might happen... 4.work the strategy
5.Measure can i have brainiest
Step-by-step explanation: