1. One yeast colony of 200 cells is growing exponentially by 10% each hour. Another yeast colony of 1000 cells is diseased and its population is decreasing by 20% each hour. At
what time (if any) will the two colonies have the same population? Only algebraic
solutions will be accepted.
[5]

b.-4 units

all you   do is count how many times you move

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

happy to

pls mark as brainliest

b

step-by-step explanation:

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15