Question 957041: Please help me solve these equations
1). The furniture store is having a 15% of sale. If the couch you want regularly costs $530, how much does it cost during the sale?
2). In history class the girl to boy ratio is 3 to 2. If there are a total of 30 students, how many girls are there?
3). Mark can run 3 miles in 18 minutes. If he can maintain his pace, how far will he be able to run in an hour?
4). The Earth's orbit around the Sun is 1,000,000,000 km. How far does the Earth travel each week?
Answer by macston(5194)   (Show Source):
You can put this solution on YOUR website! QUESTION 1) 15% off means you pay 85% of the original price. 0.85($530)=$450.50
ANSWER 1: The couch would cost $450.50 during the sale.
QUESTION 2) 3 of 5 are girls so 3/5 are girls: 3/5(30)=18 girls
ANSWER 2: There are 18 girls in the class.
QUESTION 3) (3mi/18min)(60min/1hour)=10mi/hr
ANSWER 3:Mark can run 10 miles in one hour.
QUESTION 4) (1,000,000,000km/yr)(1 year/52weeks)=19,230,769 km/wk
ANSWER: The earth travels 19,230,769 km/wk.
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