Answer: 
Step-by-step explanation:
Given
Charlie has more than 50 game coins
Steven has
coins
So, according to the question, charlie has 8 more than 3 times the steven coins i.e.

Also, this must be greater than 50

Answer:
P-value = 0.002
Step-by-step explanation:
The claim is that for a smartphone carrier's data speeds at airports, the mean is μ = 10.00 Mbps. This is the null hypothesis that is tested.
Then, the alternative hypothesis will represent the claim that the mean data speed is less than 10.00 Mbps.
We can write this as:

We have a sample size n=32. As the test statistic is z, and not t, we don't need to calculate the degrees of freedom.
The test statistic is z=-2.816. This test is a left-tailed test, so the P-value for this test is calculated as:

3 times x = 3x
the difference between 3x and 4 mean that you need to subtract, so the answer is...
3x - 4
Step-by-step explanation:
I have used tick and cross to show true n false
....,...............
A+b=2 and ab=-48, let a=x and y=b
x+y=2 implies y=2-x
xy=-48 implies x(2-x)=-48
so 2x-x^2+48=0