The number of boys . . . . . B
Twice the number of boys . . . 2B
4 more than twice the number of boys . . . 2B+4
You said that the number of girls is equal to that, so . . . G = 2B+4
But you also told us what G is: 16 = 2B+4
Subtract 4 from each side: 12 = 2B
Divide each side by 2 : 6 = B
There you have it. There are 6 boys in the club.
Its 13, because you multiply -8 and the negative beside it which turns it into a positive so you add 8 and 5
Answer:
m<B: 56
Step-by-step explanation:
All triangles add up to 180
<B = x
x + 34 + 90 = 180
x + 124 = 180
x = 56
Answer:
5
Step-by-step explanation:
Answer:
3137
Step-by-step explanation:
The decay factor is 400/110,000 = 1/275 in 30 hours. Assuming an exponential decay, the equation for the number remaining can be ...
n(t) = 110,000·(1/275)^(t/30)
Then after 19 hours, the number remaining is ...
n(19) = 110,000·(1/275)^(19/30) ≈ 3137
There will be about 3137 bacteria after 19 hours.
