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spin [16.1K]
3 years ago
8

What f(5) if f(x) = -2x +1

Mathematics
1 answer:
Effectus [21]3 years ago
5 0
F(5) is like X is 5
you just do this 
f(5)=-2x+1
     =-2(5)+1
     =-10+1
     = -9

:D
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What is the answer to (-2x-1)-(x-7)
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(-2x-1)-(x-7)
-2x-x+7-1
-3x+6
-3x=-6
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6 0
3 years ago
Test the given claim. Identify the null​ hypothesis, alternative​ hypothesis, test​ statistic, P-value, and then state the concl
Firlakuza [10]

Answer:

Being π1: proportion of passenger cars with only rear plates, and π2: proportion of commercial trucks with only rear plates, the null and alternative hypothesis are:

H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2

The test statistic is z=-1.895.

The P-value is 0.029.

The P-value (0.03) is bigger than the significance level (0.01), so the effect is not significant. The null hypothesis failed to be rejected.

There is no enough evidence to claim that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passenger cars.

Step-by-step explanation:

The claim is that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passenger cars. We have to test the hypotheses on the difference between proportions.

Being π1: proportion of passenger cars with only rear plates, and π2: proportion of commercial trucks with only rear plates, the null and alternative hypothesis are:

H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2

The significance level is 0.01.

The passenger cars, with a sample size n1=2135, have a proportion of:

p_1=x_1/N_1=244/2135=0.114

The commercial trucks, with a sample size n2=339, have a proportion of:

p_2=x_2/N_2=51/339=0.150

The weighted proportion, needed to estimate the standard error, is calculated as:

p=\dfrac{x_1+x_2}{N_1+N_2}=\dfrac{244+51}{2135+339}=\dfrac{295}{2474}=0.119

The standard error for the difference between proportions can be calculated as:

\sigma=\sqrt{\dfrac{p(1-p)}{N_1}+\dfrac{p(1-p)}{N_2}}=\sqrt{\dfrac{0.119*0.881}{2135}+\dfrac{0.119*0.881}{339}}\\\\\\\sigma=\sqrt{ 0.00036 }= 0.019

Then, the z-statistic is:

z=\dfrac{p_1-p_2}{\sigma}=\dfrac{0.114-0.150}{0.019}=\dfrac{-0.036}{0.019}=  -1.895

The P-value for this left tailed test is:

P-value=P(z

The P-value (0.03) is bigger than the significance level (0.01), so the effect is not significant. The null hypothesis failed to be rejected.

There is no enough evidence to claim that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passenger cars.

6 0
3 years ago
Please answer this correctly
marusya05 [52]

Answer:

662

Step-by-step explanation:

l x w

10x41

6x22

8x15

662

4 0
3 years ago
What is the place value of the underlined digit?
leonid [27]

Answer:

Hello! i don't see the underlined digit

4 0
2 years ago
We are given that a force of 40 N is exerted at an angle of 39°. Therefore, the force vector F can be represented as the hypoten
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The answer is 0 degrees 
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