#1
7m-17=60
m=11
1/5x - 2 = 4
x=30
2/3x + 19 = 35
x = 24
In the morning, the water temperature at the beach was 82 degrees. The temperature rose 0.6 degrees each hour. If the water temperature is now 85 degrees, write and solve an equation to find h, the number of hours that have passed.
Equation: 82 + 0.6h = 85
h= 5 hours
While at the beach, Daniel buys lunch for his family from a food stand. he purchases one hot dog for $2.50 and 3 hamburgers. If he spend $13 total, write and solve and equation to find x, the amount each hamburger cost.
2.5 + 3h = 13
x = $3.50
"Wheels by the Waves" rents bikes to customers for $3.50 an hour plus a $12 fee. If Lucy spent $33 on a bike rental, how many hours (h) did she rent a bike?
3.5h + 12 = 33
h = 6 hours
Paul is scuba diving and is 3.5 feet below sea level. He is descending at a rate of 0.5 feet per minute. If Paul is now at 12 feet below sea level, how many minutes has he been diving?
-3.5 - 0.5m = -12
m = 17 minutes
Garrett can order stickers from two companies. Company A charges a %30 design fee plus $0.80 per sticker. Company B chargers a $14 design fee plus $1.20 per sticker. How many stickers would Garrett have to order for the cost at both companies to be the same?
30 + 0.80x = 14 + 1.2 x
x = 40 stickers
Maria is monitoring the temperature of two substances in her science lab. Substance A is currently 96.2 degrees and rising 1.5 degrees each minute. Substance B is currently 98.5 degrees and cooling 0.8 degrees each minute. After how many minutes will the two substances be at the same temperature?
96.2 + 1.5x = 98.5 - 0.8x
x = 1 minute