D is correct because 150+50=200 and if 200sf is 4 hours and 150 is 2 1/2 hours 1/2+1/2=1
Answer:
x=2 and y= -3
Step-by-step explanation:
This is a simultaneous equation. To solve this type of equation, there are three methods; substitution, Elimination and Graphical.
But here, we would be using the substitution method.
3x-y=9 Equation 1
2x-y=7. Equation 2
Getting y from equation 2, we have
-y= 7-2x
Multiply both sides by -
y= 2x-7 Equation 3
Substituting y for 2x-7 in equation 1, we have
3x- (2x-7)=9
3x-2x+7=9
x+7=9
x=9-7
x=2
Substituting x as 2 in equation 3
y=2x-7
y= 2(2)-7
y= 4-7
y= -3
Answer: I think the answer is $48
Step-by-step explanation: $0.24 * 200 = $48
Answer:
x = 13
Step-by-step explanation:
Given
x + 15 = 28
Isolate x on the left side by subtracting 15 from both sides
x = 28 - 15 = 13
Step-by-step explanation:
1book valume = 25cm×20cm×2cm=1000cm³
a packet valume = 6×1000cm³ = 6000cm³
