The value of (f+g)(x) is x^2 + 3x - 11
You can combine this by simply adding the like terms. Start by adding together all of the x^2 terms. Since only g(x) has one of those, we use that in its entirety.
x^2
Next we add together the x terms. f(x) has 7x and g(x) has -4x.
7x + -4x = 3x
Finally, we add together the constants. f(x) has -3 and g(x) has -8.
-3 + -8 = -11
With all of the like terms combined, we simply take the answers and put them together.
x^2 + 3x - 11
Answer: the answer is 20
Step-by-step explanation:
Use order of operations and divide 8 by 2 and you get 4. Then use the PEMDAS (parentheses,exponents,multiplacation,division,addition, subtraction) method. Go left to right. And solve. :) I hope this helps
Answer:
The first one..
Step-by-step explanation:
You can use
cos(theta) = u · v / ║u║║v║
that will come out to:
u = 2 x (-4) = -8
v = 3 x (-8) = - 24
u · v = -16
║u║ = =
║v║ =
cos(theta) = -16/2
and to find (theta), you can now do
theta = (cos^-1) ( -16/2 )
I don't have a calculator, but you can solve that final problem to find theta
Answer: -1.77
Step-by-step explanation:
Let be the population mean.
Given : The engineer designed the valve such that it would produce a mean pressure of 5.5 psi. It is believed that the valve does not perform to the specifications.
Then ,
Since , the alternative hypothesis is two-tailed , so the test is a two tailed test.
Also. sample size :
Sample mean :
Test statistic for population mean :-