Answer:
161y - 45
Step-by-step explanation:
Set up a proportion:
kid/dad = kid/dad
8/9 = 5.5/dad
Cross multiply to solve proportions:
8*dad = 9*5.5
8*dad = 49.5
dad = 6.1875 feet
They want inches so multiply by 12:
74.25 inches
They want "nearest inch" so:
Dad is 74 inches tall.
So he is paid 46.5 flat every day
he earns 5% of each smart phone he sells
at the time of the problem, smart phones sell for 70 so he earns 5% or 70 or 5/100 of 70 or 1/20 of 70 or 70/20 or 7/2 or 3 and 1/2 or $3.50 per phone he sells
so pay must be at lease 150 so
pay=46.5+ (# of phones times 3.50)
150<u><</u>46.50+(number of pones times 3.50)
solve for number of phones
subtract 46.5 from both sides
103.5<u><</u>(number of phonest imes 3.5)
divdie both sides by 3.5
29.57<u><</u>number of phones
round up since can't sell a fraction of a phone
30
he has to sell at leas 30 phones
-3(x - 10) > = -3 <== ur inequality
-3x + 30 > = -3
-3x > = -3 - 30
-3x > = -33
x < = -33/-3
x < = 11 <== ur solution
The answer is B.
Best of luck.
