Answer:
13 Quarters
Step-by-step explanation:
Let <u>D</u> and <u>Q</u> stand for the numbers of Dimes and Quarters.
We are told that:
D + Q = 31
We also find that:
D = Q + 5
Use the second expression (for D) in place of D in the first equation:
D + Q = 31
(Q+5) + Q = 31
2Q = 26
<u>Q = 13</u>
This means there are:
D = 13 + 5 or <u>18 Dimes</u>
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Check
D + Q = 31 ?
18 + 13 = 31 <u> YES</u>
D = Q + 5 ?
18 = 13 + 5 <u>YES</u>
Answer:
Step-by-step explanation:
4x + 3y + x + 4y
= 4x + x + 3y + 4y
= 5x + 7y
4x + 3y + 2x - y
= 4x + 2x + 3y - y
= 6x + 2y
4x + 5y - ( x + 4y )
= 4x + 5y - x - 4y
= 4x - x + 5y - 4y
= 3x + y
2x - y + 3x + y
= 2x + 3x - y + y
= 5x + 0
= 5x
Answer:
Step-by-step explanation:
Use the slope formula here along with the fact that the slope is equal to 1:
and
and cross multiply to get x - 4 = -7 so
x = -3
Answer:
C
Step-by-step explanation:
As you can see, the dot on the line is the starting point and it is open.
An open dot means less than or more than. An closed dot means less than or equal to / more than or equal to.
The line is going right starting from -5, so it is more than 5.