![dctjr](/avatars/33311.jpg)
dctjr
04.08.2019 •
Mathematics
Giselle works as a carpenter and as a blacksmith. she earns $20\$20$20dollar sign, 20 per hour as a carpenter and $25\$25$25dollar sign, 25 per hour as a blacksmith. last week, giselle worked both jobs for a total of 30303030 hours, and earned a total of $690\$690$690dollar sign, 690. how long did giselle work as a carpenter last week, and how long did she work as a blacksmith?
Solved
Show answers
More tips
- F Family and Home How to Get Rid of Your Neighbors?...
- S Society and Politics How Could Nobody Know About the Dead Mountaineers?...
- H Health and Medicine How to Cure Adenoids?...
- H Health and Medicine Why Wearing a Back Brace Can Be Beneficial During Back Strain?...
- S Sport When and Where Will the 2014 World Cup be Held?...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- C Computers and Internet How to Learn to Type Fast?...
Answers on questions: Mathematics
- M Mathematics How to interpret the meaning of a slope...
- M Mathematics Hi guysplease help ...
- M Mathematics Find the value of (1.7)²...
- M Mathematics An entrepreneur is opening a business to market pies and pie fillings based on her family’s recipes. The price of every item in the store is $6....
- M Mathematics What is the area of this triangle? Enter your answer in the box....
- M Mathematics ) Type the correct answer in the box. The line of best fit for this scatter plot shows the relationship between the average temperature and the monthly electricity bill at Jenny s...
- M Mathematics This figure is made up of a rectangle and parallelogram. What is the area of this figure....
- M Mathematics Can someone help me do this question :(...
- M Mathematics Hi can someone pleasee help?...
- M Mathematics If a=6 and b=24 what is (a+b)^2...
Ответ:
Ответ:
total work 30 hrs = x + y
total earning $690 = 20x + 25y
from first eqn, x = 30 - y
substitute in second eqn
690 = 20(30-y) + 25y
690 = 600 - 20y + 25y
690 - 600 = -20y + 25y
90 = 5y
y = 18 hours
x = 30 - y = 30 - 18 = 12 hours
Ответ: