Answer:
b
Step-by-step explanation:
Answer:
35
Step-by-step explanation:
y = k*x
21 = k*3
k = 7
x=5 .. y = 7 * 5 = 35
Factor by grouping is (3x+5)(x+5) .
Answer:9 minutes
Step-by-step explanation:
1. to find how much was drained subtract how much is left from the total amount when full 88-34= 54
2. divide answer by the rate per minute 54/6
3. you have answer 9 minutes
Greatest common factor (or denominator) is 6,
least common multiple is 180
hmm
(note:
I spent like 30 mins trying to use a math only of finding the values
but it didn't work so I did a force brute and elimination method
explained below)
so
a and b must be multiples of 6
so list all the multiples of 6
wait
180=6*30
and 30's factors are 1,2,3,5,6,10,15,30 so only list the numbers that
are the result of multiplying 6 and any of those numbers in that list
(so we can have the lcm of 180)
so
6*1=6
6*2=12
6*3=18
6*5=30
6*6=36
6*10=60
6*15=90
6*30=180
these are our possible candidates for the 2 numbers
now we must find the pair that has a GCD of only 6
doing the math is long and tedious so do it yourself (trial and error)
we see that our choices that fulfill both requirements (GCD of 6 and LCM of 180) are
90&12
60&18
30&36
sum them to find the least one
90+12=102
60+18=78
30+36=66
the least possible sum is 66
