Answer:
He washed 10 cars.
Step-by-step explanation:
To make this easier covert 1/2hours into 1/4 hours. 2 1/2 = 4/2+1/2 = 5/2. Now take 5/2 and make it 1/4th's, 5/2 = 10/4. It takes 1/4 hours to wash one car so, 10/4 divided by 1/4. Don't divide fractions so, 10/4 x 4/1, we switch the second number around to get 40/4. Now we can simplify, 40/4 = 10.
Answer:
Step-by-step explanation:
<em>It is assumed XYZ is a right triangle.</em>
- y/10 = sin 32°
- y = 10 sin 32°
- y = 5.3
Answer:
30 km/h
Step-by-step explanation:
usual speed= x km/h
increased speed= x +10 km/h
distance= 360 km
time difference= 3 h
- 360/x= 360/(x+10) +3
- 360/x= (360+ 3x+30)/(x+10)
- 360(x+10)= x(390+3x)
- 360x+3600= 390x+ 3x²
- 3x² + 30 x -3600=0
- x²+10x-1200=0
- x=30 km/h
QR/KL=PQ/JK=PR/JL
t/1.5=25/5=22.5/4.5
t/1.5=5=5
t/1.5=5
solving for t:
1.5(t/1.5)=1.5(5)
t=7.5
Answer: t=7.5
Put ur equations in y = mx + b form and compare the slopes(m) and the y intercepts (b). Parallel lines will have the same slope but different y intercepts.
A) y = 2x + 4....slope is 2, y int is 4
B) 2y = x + 4
y = 1/2x + 2.....slope is 1/2 and y int is 2
C) 2x + 2y = 4
2y = -2x + 4
y = -x + 2.....slope is -1 and y int is 2
D) 2x - y = 4
-y = -2x + 4
y = 2x - 4....slope is 2 and y int is -4
ur parallel lines will have same slope and different y int.....so ur answer is A and D.
