Step-by-step explanation:
Answer:
m = 0
Step-by-step explanation:
To find the slope of a line, use the equation:
m = y2 - y1 / x2 - x1
Then, substitute in numbers:
m = 0 - 0 / -6 - 4
m = 0 / -10
m = 0
Therefore, the slope of the line is 0, meaning it has zero slope.
Isn't that a multiple chose
Answer:
A manager of a grocery store wants to determine if consumers are spending more than the national average.
Yes is the answer
Step-by-step explanation:
Given that the national average is $150.00 with a standard deviation of $30.20.
Sample size n =40
H0: x bar = mu
Ha: x bar >mu
(one tailed test for a single mean)
Sample average x bar = 160
Mean difference = 160-150 =10
std error = 30.20/sqrt 40
=4.775
Test statistic = 2.094
Z critical for 2.5% = 1.96 (one tailed)
Since test statistic > z critical we reject null hypothesis.
Hence Manager's contention is right.
Answer:
The answer is C
Step-by-step explanation:
Move the nine to the other side of the equal sign
Use the quadratic formula
Find a, b, and c
A=2, B=1, C=-10
Plug them in
1 squared minus 4(2)(-10)
1+80
81
Square root of 81=9
<u>-</u><u>1-9</u><u> </u> <u>-1+9</u>
4 4
<u>-</u><u>10</u><u> </u> <u>8</u>
4 4
Simplify
<u>-5</u> <u>2</u>
2 1
<u>-</u><u>5</u><u> </u> 2
2