![bellaforlife9](/avatars/5923.jpg)
bellaforlife9
01.08.2019 •
Mathematics
Boris's coffee shop makes a blend that is a mixture of two types of coffee. type a coffee costs boris $5.45 per pound, and type b coffee costs $4.20 per pound. this month, boris made 178 pounds of the blend, for a total cost of $870.10 . how many pounds of type b coffee did he use?
Solved
Show answers
More tips
- W Work and Career Where can you learn to be a flight attendant?...
- C Cities and Countries What time does the Metro open in Moscow?...
- S Style and Beauty How to Get Rid of Under Eye Bruises?...
- F Food and Cooking How to Calculate the Gender of Your Child with Blood?...
- C Computers and Internet IMHO: What is it, why is it important, and how to use it?...
- H Health and Medicine Effective Ways to Treat Colic in Infants...
- H Health and Medicine How to Treat the Flu: A Comprehensive Guide...
- S Style and Beauty 5 Tips for Choosing the Best Ugg Boots...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- C Computers and Internet iPhone SMS Delivery Report: How to Set It Up...
Answers on questions: Mathematics
- M Mathematics Which describes the correlation shown in the scatterplot?...
- M Mathematics How can you express 499 to find the product 499 x 5 using mental math? explain...
- M Mathematics What are the solutions of 3(2m − 1) ≤ 6m − 2?...
- H History What was the main idea of the U.N declaration...
- M Mathematics According to euclid’s fourth postulate, which type of angles are always congruent...
- M Mathematics Jessica Dan and Kevin sent a total of 72 messages over their cell phones during the weekend. Dan sent eight more messages than Jessica. Kevin sent two times as many messages...
Ответ:
y=pounds of Type B coffee
QUANTITY EQUATION:
x+y=178
COST EQUATION:
$5.45x + $4.20y=$870.10
STEP 1:
Solve for one variable in equation one. Then substitute it in equation two.
x+y=178
subtract y from both sides of the equation
x=178-y
STEP 2:
substitute x=178-y in equation two
5.45x + 4.20y=870.10
5.45(178-y) + 4.20y=870.10
multiply 5.45 by everything in parentheses
(5.45*178)+(5.45*-y)+4.20y=870.10
970.10-5.45y+4.20y=870.10
combine like terms
970.10-1.25y=870.10
subtract 970.10 from both sides
-1.25y=-100
divide both sides by -1.25
y=80 pounds of type B coffee
STEP 3:
Substitute y=80 in either equation to solve for x
x+y=178
x+80=178
subtract 80 from both sides
x=98 pounds of type A coffee
ANSWER:
x=98 pounds of type A coffee
y= 80 pounds of type B coffee
CHECK:
Substitute answers for x & y into either equation to be sure it checks.
5.45x+4.20y=870.10
5.45(98)+4.20(80)=870.10
534.10+336=870.10
870.10=870.10
Hope this helps! :)
Ответ:
boy you are on your on i really don´t know that
Step-by-step explanation: