Answer:
What do you need to answer, you never said
Step-by-step explanation:
Answer:
Step-by-step explanation:
y & xz
y = kxz
k = y/xz
When y = 90, x = 2 and z = 9
k = 90/(2×9) = 10/2
k = 5
y = 5xz
When y = 105 and z = 3
105 = 5×3x
105 = 15x
x = 105/15
x = 7
Answer:

Step-by-step explanation:
move the variable to the right(-2x) and change the sign(2x now) -3y=-12+2x then change the signs (-3y is 3y , -12 is 12 and then 2x becomes -2x again) then divide both sides of the equation by 3 so 12÷3=4 and -2x÷3=
then you're going to use the commutative property to reorder the terms . so your answer is 
Answer:
0.8417
Step-by-step explanation:
The probability that a college student uses Twitter for social networking is
then the probability that a college student does not use Twitter for social networking is 
9 students are chosen at random.
Use the binomial probability formula to find the probability that 8 use Twitter:
Use the binomial probability formula to find the probability that 9 use Twitter:

The probability that more than 7 students use Twitter is