Answer:
B) 5x+15y=30
5x-5y=10
Step-by-step explanation:
First, we solve the top equations by addition. Multiply the first one by -4.
-4x-12y=-24
4x-8y=4
This equals -20y=-20, so y=1. Now we put that back into either equation and find that x=3. So the solution set is (3,1)
Plugging those into each of the possible choices, we find that the answer is
B) 5x+15y=30. 5(3)+15(1)=30 15+15=30. 30=30 CHECK
5x-5y=10 5(3)-5(1)=10. 15-5=10. 10=10. CHECK
Answer:
44
Step-by-step explanation:
There are 4 quarters in a dollar.
"How many quarters are there in eleven (11) dollars?"
4 x 11 = 44
There are 44 quarters in eleven dollars.
Step-by-step explanation:
Use Pythagoras' theorem
52² = 33.6² + x²
solve for x
Answer:
13.
14.
Step-by-step explanation:
13.
Given
Required
Determine the distance between M and S
Distance (D) is calculated using:
Where
<em>Hence, the distance between M and S is 18 units</em>
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14.
The coordinate of S and P are not given,
So, I'll just use (x,y) for P
i.e.
Required
Determine the coordinates of S
If S is 6 units above P, then the coordinates of S is
<em>i.e. we add the units to the y coordinate of P.</em>
The answer is 5/2 I just took the test!!! Hope I helped :)