Answer:
A & D
Step-by-step explanation:
Just plug in the possible answer choices into the equation to see if it makes sense. You'll find out that -18 and 18 work, while -9 and 9 doesn't.
Okay. 400cm is 4 meters. The ration of 4 meters : 2 meters simplified is 2 meters : 1 meter. The ration is 2 meters : 1 meter (200 cm : 1 meter).
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
Answer:
he has 11 dimes and 15 nickels
Step-by-step explanation:
i kept going down reducing the amount of dimes and adding to the amount of nickels and found that 11 dimes is $1.10 and 15 nickels is $0.75
-7 x 7 = -49
We can first figure out 7 x 7, which will be 49. Once we have that, we can look at our negatives. If we have an odd number of negative signs, the answer will be negative. If we have an even number of negative signs, the answer will be positive. In this case, we only have 1 negative sign, and 1 is odd, therefore our answer will be odd.
ANSWER: -49
Hope this helps!