Question 884669: 1)Which of the following could be the first steps toward solving the system, 4x+y=30 and -12+2y=20? Select all that apply.
a)Multiply the second equation by 2 and then add.
b)Multiply the first equation by 2 and then subtract.
c)Divide the second equation by 2 and then subtract.
d)Multiply the second equation by 3 and then subtract
2)Suppose you have 30 coins that total $2.10. Some of the coins are pennies and the rest are dimes. Which system of equations can be solved to find the number of each type of coin you have?
a)p+d=30, p+d=210
b)p+d=30, p+10d=20
c)p+10d=30, p+d=210
d)none of the above
3)One times a number x, plus 2 times a number y, equals 9. Negative one times x minus 3 times y equals -14. What are the numbers?
a)x = 7, y = 12
b)x = -1, y = 5
c)x = 5, y = 1
d)x = -11, y = 24
4)Six times a number x, plus 4 times a number y, equals 14. Negative eight times x minus 4 times y equals -12. What are the numbers?
a)x = -1, y = 5
b)x = 19, y = 4
c)x = 2.31, y = 1
d)x = -11, y = 24
Answer by geetha_rama(94)   (Show Source):
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