# Pre algebra help 10 questions 20 mintues

Jul 30th, 2015
HelloWorld
Category:
Algebra
Price: \$10 USD

Question description

Examine this system of equations. Which number can be multiplied by each equation so that when the two equations are added together, the y term is eliminated? 3/4 +2/3y=6 5/8+5/6=12 15 times the first equation and 12 times the second equation 15 times the first equation and –12 times the second equation 30 times the first equation and –6 times the second equation 30 times the first equation and 6 times the second equation Collin wants to solve this system of equations. Which number can he multiply the first equation by so that when the two equations are added together, the x term is eliminated? 1/2x+1/4y=5 2x+3/8y-5 –4 –2 2 4 Alexa pays 7/20 of a dollar for each minute she uses her pay-as-you-go phone for a call, and 2/5 of a dollar for each minute of data she uses. This month, she used a total of 85 minutes and the bill was \$31. Which statements are true? Check all that apply. The system of equations is x + y = 31 and 7/20x +2/5y =85 The system of equations is x + y = 85 and 7/20x +2/5y =31 To eliminate the y-variable from the equations, you can multiply the equation with the fractions by 5 and leave the other equation as it is. To eliminate the x-variable from the equations, you can multiply the equation with the fractions by 20 and multiply the other equation by -7. She used 25 minutes for calling and 60 minutes for data. She used 60 minutes for calling and 25 minutes for data. She used 20 minutes for calling and 11 minutes for data. She used 11 minutes for calling and 20 minutes for data. Examine this system of equations. Which numbers can be multiplied by each equation so that when the two equations are added together, the x term is eliminated? 1/5x+3/4y=9 2/3x=-5/6y=8 –10 times the first equation and 3 times the second equation 10 times the first equation and 3 times the second equation –3 times the first equation and 5 times the second equation 3 times the first equation and 5 times the second equation Examine the system of equations. Which is an equivalent form of the first equation that when added to the second equation eliminates the y terms? -5/8x +3/4y=12 8x+12y=11 10x – 12y = –192 –10x + 12y = 192 5x – 12y = 96 –5x + 12y = 96 A box containing a total of 179 copies of two different paperback books was shipped to Marci’s school. The total weight of the books was 128 pounds. If the weight of each of the first paperbacks was 2/3 of a pound and the weight of each of the second paperbacks was 2/4 of a pound, which statements are true? Check all that apply. The system of equations is x + y = 179 and 2/3x+3/4y=128 The system of equations is x + y = 128 and 2/3x+3/4y=179 To eliminate the x-variable from the equations, you can multiply the equation with the fractions by 3 and leave the other equation as it is. To eliminate the y-variable from the equations, you can multiply the equation with the fractions by –4 and multiply the other equation by 3. There are 104 copies of one book and 24 copies of the other. There are 93 copies of one book and 35 copies of the other. There are 104 copies of one book and 75 copies of the other. There are 93 copies of one book and 86 copies of the other.

(Top Tutor) Daniel C.
(997)
School: New York University

Studypool has helped 1,244,100 students

## Review from our student for this Answer

FratBro23
Jul 30th, 2015
"Excellent!"

1829 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors