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anonymous

  • one year ago

please help me on these

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  1. anonymous
    • one year ago
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    For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation? 3x + y = 8 -x - 2y = -10 -2y + 10 2y + 10 2y - 10 -2y - 10

  2. anonymous
    • one year ago
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    Solve the following system of equations: 3x - 2y = 6 6x - 4y = 12 (0, 0) (6, 12) Infinitely many solutions No solutions

  3. anonymous
    • one year ago
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    The total price of a shirt and a cap is $11. If the price of the shirt was doubled and the price of the cap was 3 times its original price, the total price of a shirt and a cap would be $25. What is the price of a shirt and a cap? Price of a shirt is $9, and price of a cap is $2. Price of a shirt is $10, and price of a cap is $1. Price of a shirt is $8, and price of a cap is $3. Price of a shirt is $7, and price of a cap is $4.

  4. anonymous
    • one year ago
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    Harry had $32. He spent all the money on buying 3 notebooks for $x each and 4 packs of index cards for $y each. If Harry had bought 5 notebooks and 5 packs of index cards, he would have run short of $18. A student concluded that the price of each notebook is $5 and the price of each pack of index cards is $1. Which statement best justifies whether the student's conclusion is correct or incorrect? The student's conclusion is incorrect because the solution to the system of equations 3x + 4y = 32 and 5x + 5y = 50 is (8, 2). The student's conclusion is incorrect because the solution to the system of equations 3x + 4y = 32 and 5x + 5y = 18 is (8, 2). The student's conclusion is correct because the solution to the system of equations 3x + 4y = 32 and 5x + 5y = 18 is (5, 1). The student's conclusion is correct because the solution to the system of equations 3x – 4y = 32 and 5x – 5y = 50 is (5, 1).

  5. anonymous
    • one year ago
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    An equation is shown below: 3 over 2 multiplied by x plus 7 over 2 equals 2 to the power of x What is the solution to the equation? x = 1 x = 3 x = 5 x = 8

  6. anonymous
    • one year ago
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    Which of the following statements best describes the graph of 3x – 2y = 4? It is a straight line joining the points (6, 2), (5, 1), and (7, 3). It is a straight line joining the points (0, –2), (2, 1), and (–2, –5). It is a curve joining the points (3, –2), (2, 3), and (4, 1). It is a curve joining the points (0, 2), (–2, –1), and (4, 1).

  7. anonymous
    • one year ago
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    The graph of an equation is shown below: line joining ordered pairs negative 3,2 and 1, negative 2 Based on the graph, which of the following represents a solution to the equation?

  8. anonymous
    • one year ago
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    (–2,–3) (2, 1) (1, 2) (–3, 2)

  9. anonymous
    • one year ago
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    whoa hold the phone one at a time is much less intimidating

  10. anonymous
    • one year ago
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    ok wel the first one

  11. anonymous
    • one year ago
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    had to scroll way the heck up solve \[-x - 2y = -10 \] for \(x\) which takes two steps

  12. anonymous
    • one year ago
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    add \(2y\) to both sides then change the sign of each term

  13. anonymous
    • one year ago
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    \[-x-2y=10\\ -x=2y-10\\ x=-2y+10\] in other words

  14. anonymous
    • one year ago
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    so B

  15. anonymous
    • one year ago
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    okay now how about the second one

  16. anonymous
    • one year ago
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    \[3x - 2y = 6 \\6x - 4y = 12 \] if you multiply the first equation all the way across by 2, you get the second equation exactly

  17. anonymous
    • one year ago
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    that means they are the same line so "infinitely many solutions"

  18. anonymous
    • one year ago
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    Your the best omg how about the thrid one

  19. johnweldon1993
    • one year ago
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    Price of a shirt is $9, and price of a cap is $2. Price of a shirt is $10, and price of a cap is $1. Price of a shirt is $8, and price of a cap is $3. Price of a shirt is $7, and price of a cap is $4. Let shirt = s and cap = c \[\large s + c = 11\] \[\large 2s + 3c = 25\] lets sub the first equation \(\large s = 11 - c\) into the second \[\large 2(11 -c) + 3c = 25\] \[\large 22 - 2c + 3c = 25\] \[\large 22 + c = 25\] \[\large c = 3\] The price of a cap is 3 Meaning the shirt is 8

  20. anonymous
    • one year ago
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    Great the next one?

  21. imqwerty
    • one year ago
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    LOL the guy with ss 100 helped u don't u feel great haha :D

  22. anonymous
    • one year ago
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    what

  23. imqwerty
    • one year ago
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    Satellite is the only guy in the whole openstudy who has smart score of 100 he is at the top :D

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