Sumaya is using two different
different Strings of Christmas
lights to
decorate her house
one String flashes
every 10 Seconds.
The other String flashes every 15
Seconds. when sumaya
turns on the lights they flash at the same. work out how long it will be before they flash again at the same time. use the lowest common multiple to work out ur answer ​

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question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

question 1: step-by-step explanation:

1/4 of 84 = 84÷4= 21