Answer:
Use a hypothesis test for difference of 2 means
We reject the null hypothesis
Step-by-step explanation:
We will use a hypothesis test for the difference of 2 means, where the population variances are unknown and not assumed equal. (The problem didn't tell us that the variances are equal, so we can't assume they are).
We first need to find the sample means and since we don't know the population variances, we need to find the sample variances as well.
See first attached photo for the calculations of these values...
See second attached photo for the hypothesis test...
Answer:
The velocity after time t=7s. is 32 feet/s
Step-by-step explanation:
Given equation is v=(-32)t+256.
Where, v is velocity in feet/sec and t is time in seconds.
The figure show that graph of equation.
To find velocity after time t=7s.
Step 1 : Draw a graph of equation with time on x-axis and velocity of y-axis.
Step 2: Draw a line t=7and extent until it intersects with the equation of line.
Step 3: From point of intersection, draw a line parallel to x-axis and let it intersect the y-axis.
Wherever the line intersect with y-axis is answer for velocity after time t=7s.
From the figure,
The velocity after time t=7s. is 32 feet/s
<em>Verification,</em>
v=(-32)t+256.
When t=7s
v=(-32)(7)+256.
v=32feet/s
Answer:
(2x+1)^2 or 4x^2+4x+1
Step-by-step explanation:
I'm going to assume you need to find f(g(x)) when f(x)=x^2 and g(x)=2x+1
You first need to find g(x) which is 2x+1
You then take the f(x) function and replace x with 2x+1
This means our new equation is
(2x+1)^2
Your teacher may or may not want you stop here, really only you know the answer to that
But if we expand this we'll find that (2x+1)^2=4x^2+4x+1
You're right because they are corresponding angles and corresponding angles are congruent.
The answer is D. b=c+ 1/2
a+b+c=10
a+(c+1/2)+c=10
a+2c+1/2=10
a+2c=9.5
hope it helps