**Question 121 – “What is the value…”**

OG Explanation is fine. Factoring is not necessary but if you like to factor, 2x^{2}-2.4x-1.7 = (2x+1)(x-1.7)

When x=0.7, (1.4+1)(.7-1.7) = 2.4(-1) = -2.40

**Question 122 – “If s, u, v….”**

OG Explanation is fine.

**Question 123 – “In the rectangular…”**

OG Explanation is okay. You could just graph the points. Note: When you multiply or divide an inequality by a negative number, you MUST change the sign.

**Question 124 – “The cost to rent…”**

OG Explanation is okay. You could pick numbers. If x=$160. Then with 16 people the cost is $10 and with 10 people the cost is $16. Therefore, per person it costs $6 more.

a) 16/6 does not equal 6

b) 160/10 does not equal 6

c) 160/16 does not equal 6

d) 480/40 does not equal 6

e) 480/80 does equal 6

The answer is E

**Question 125 – “If x is an integer…”**

OG Explanation is fine. You could also pick numbers and try process of elimination.

**Question 126 – “A certain electronic component…”**

OG Explanation is fine.

**Question 127 – “As a salesperson…”**

OG Explanation is fine.

**Question 128 – “ If (x+y)/….”**

OG Explanation is fine.

**Question 129 – “Last year….”**

OG Explanation is fine. Alternatively, let sales of January through November = $1 per month and let December be $4 Total Sales = 11($1) + $4 = $15 Decembers share is 4/15. The answer is B.

**Question 130 – “Working alone….”**

OG Explanation is okay. You could pick numbers. The least common multiple of 15 and 18 is 90 so it is a good number to use for the combined rate of printers Y and Z. Y gets 6 jobs in 90 hours and Z gets 5 jobs done in 90 hours. Combined, they get 11 jobs done in 90 hours. Machine X can get these 11 jobs done in 11(12) =132 hours. (Note: since we are finding a ratio, the ratio of the time it takes X to complete 1 job to Y and Z completing 1 job is the same as the ratio of the time it takes X to complete 11 jobs to Y and Z completing 11 jobs) The ratio of the time it takes printer X do the job to ratio it takes Y and Z working tether is 132/90 = 66/45 = 22/15. The answer is D.