mckenziebeach5ox9oy3
19.07.2019 •
Mathematics
On a string of red and blue lights, the red lights blink everyb3 seconds, and the blue lights blink every 5 seconds. how many times will they blink at the same time in one minute?
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Ответ:
what is the smallest number they both mutiply to
3*5=15
so every 15 seconds
so at 15, 30, 45, 60 seconds
so 4 times if you count the time exactly at 1 minute
Ответ:
-1.9
Step-by-step explanation:
He has $1.10 in his printing account. 0.25 each sheet of paper.
47 pages.
He printed both sides so 47:2= 23.5.
Because he printed 2 pages then we divide by 2.
23.5:2=11.75
We cannot print a half of page, so we print 12 pages.
12*0.25=3
1.10-3=-1,9
His printing account will be in minus.