Solve.
1 answer:
Answer:
Option C is correct.
The solution is (3, -1)
Step-by-step explanation:
Substitution
Given the system of equation:
......[1]
......[2]
We can write equation [2] as;
d = e +4 ....[3]
Using substitution method;
Substitute the value of d in equation [1] we have;
Combine like terms;
Subtract 4 from both sides, we get
2e = -2
Divide both sides by 2 we get;
e = -1
Substitute the value of e = -1 in [1] we have;
d +(-1) = 2
d -1 = 2
Add 1 to both sides of an equation;
d = 3
Therefore, the solution for the given system of equation is, (3, -1)
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Answer:
1) 8
2) 450 ft^2
Step-by-step explanation:
Each triangle takes half a square worth of space, so if you add up 2 triangles for 1 square that is 1/4 of the area, multiply that by 4 and you get 8 cameras.
The left over space in the store is the same amount of space as all the cameras space added together since each camera takes up half a square. That way 4 cameras(each 112.5 ft^2 each) equals 1/2 of the room which added together is 450 ft^2, the other half would be the left over space, 450 ft^2.
