Answer:
After 120 seconds
Step-by-step explanation:
Here, we want to know the number of seconds after which both spotlights will change colors at the same time again.
Basically, what we want to do here is to
calculate the value with which 30 and 40 have the same multiples or we want to
calculate the lowest common multiple of 30 and 40
The multiples of 30 are 30,60,90,120 etc
The multiples of 40 are 40,80,120 etc
We can see that the lowest common multiple of both is 120
So therefore the spotlights will change colors at the same time after 120 seconds
Answer: b and c cuz an equation always has an equal sign
Step-by-step explanation:
Answer:
y=5/2x-5
Step-by-step explanation:
Answer:
She has 2 1/24 meters of ribbon
Step-by-step explanation:
Skye has 12 1/4 meters of ribbon, and she uses 2/3 of that.
To know how much she uses we have to multiply the total by the fraction she uses:
12 1/4 * 2/3,
12 1/4 is the same as 49/4, so we can solve by multiplying the nominators and denominators:
49/4 * 2/3 = 49/6;
So she used 49/4 meters of ribbon or 8.167 m.
Now we are going to see how much ribbon is left by subtracting from the total what she used:
12 1/4 - 49/4 = 49/12 meters that she has left.
And out of those she uses 1/2, so we are going to multiply what she has left by 1/2:
49/12 * 1/2 = 49/24 = 2 1/24 = 2.04167 meters that she used of the remaining.
And because she used half she still has the other half of the remaining:
2 1/24 or 2.94167 meters.
Answer:-4,3
Step-by-step explanation:
i just know it
