Answer:
Its B
Step-by-step explanation:
D. 80
when you write the proportion (attached) you don't even need to solve because you see that 50/25 = 2, so 40 * 2 must be the answer. (80)
Answer:
x=17/11
Step-by-step explanation:
1. 7−3(x−4)=2(4x+1)
2. −3x+19=8x+2
3. −3x+19−8x=8x+2−8x
4.−11x+19=2
5. −11x+19−19=2−19
6.x=(17/11)
Hope this helps :)
-Shadyk
Answer:
(i) 1/9.
(ii) 52/225
(iii) 41/225.
Step-by-step explanation:
There are 15 balls in the bag.
So:
(i) Prob(2 red balls) = 5/15 * 5/15
= 1/3 * 1/3
= 1/9.
(ii) (i) Prob(2 blues) = 6/15 * 6/15
= 36/225.
Prob( 2 blacks) = 4/15 * 4/15
= 16/225
So the probability of 2 blues or 2 blacks
4/25 + 16/225
= 52/225.
(iii) Prob ( red ball then black) = 5/15 * 5/15 = 25/225.
Prob(black ball then red ball) = 4/15 * 4/15 = 16/225
So the probability of 1 black and 1 red = 41/225.