Answer: d
Step-by-step explanation:
The probability of not being purple is the probability of the three other colors. Suppose the number of purple marbles is x. Then we have 20+30+40+x = 90 + x marbles. Then the probability of not being purple is 90/(90+x). If this fraction can have a lowest term for some value of x, then the numerator of this lowest term must be a factor of 90.
Checking through the options, only option D has a non-factor of 90 as its numerator.
B and D and C in that order
Answer:
x=4
Step-by-step explanation:
12x=48
12x/12 =48/12
x=4
Answer:
The Y intercept is -5 and the slope is -5/2
