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neonofarm [45]
3 years ago
13

What is the additive inverse of -3.2?

Mathematics
1 answer:
Serhud [2]3 years ago
8 0

Answer:

3.2

Step-by-step explanation:

The additive inverse is what do we add to make it zero

x + -3.2 =0

Add 3.2 to each side

x+-3.2+3.2 = 0+3.2

x = 3.2

The additive inverse is 3.2

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A pole casts a 6-foot shadow. If the distance from the top of the pole to the tip of the shadow is
KATRIN_1 [288]

Answer:

8feet high

Step-by-step explanation:

To get the height of the pole, we will use the pythagoras theorem. Let H be the height

H²  = 10² -6²

H² = 100 - 36

H² = 64

H = √64

H = 8feet

Hence the pole is 8feet high

3 0
3 years ago
Either use technology to find the P-value or use
Akimi4 [234]

Answer:

The first step is calculate the degrees of freedom, on this case:  

df=n-1=21-1=20  

Since is a one side left tailed test the p value would be:  

p_v =P(t_{(20)}  

And we can use the following excel code to find it: "=T.DIST(-0.024,20,TRUE)"

Step-by-step explanation:

Data given and notation  

\bar X represent the mean

s represent the sample standard deviation

n=21 sample size  

\mu_o =140 represent the value that we want to test

\alpha represent the significance level for the hypothesis test.  

t=-0.024 would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean for the widths of tornadoes is lower than 140 yd, the system of hypothesis would be:  

Null hypothesis:\mu \geq 140  

Alternative hypothesis:\mu < 140  

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

The statistic is given by: t = -0.024

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=21-1=20  

Since is a one side left tailed test the p value would be:  

p_v =P(t_{(20)}  

And we can use the following excel code to find it: "=T.DIST(-0.024,20,TRUE)"

Based on the p value obtained we can conclude that we FAIL to reject the null hypothesis at any significance level selected \alpah=0.01,0.05,0.1

7 0
3 years ago
The recycling center pays $0.01 for each aluminum can recycled. Dan was payed $10.00 for all his aluminum cans. How many aluminu
Setler [38]

Answer:

1000

Step-by-step explanation:

To solve this you divide 10/0.01 and you get 1000.

Hope it helps!

8 0
3 years ago
What is the slope of line that passes through the points -2,4 and 1,-1​
GalinKa [24]

Answer:

-5/3

Step-by-step explanation:

-2 to 1 =3   x=3

4 to -1=5   y=-5

y/x      slope=-5/3 or -1  2/3

4 0
3 years ago
Find two numbers that round to 15.5 when rounded to the nearest tenth write the numbers in the box
mixer [17]
I think these are the answers but i'm not to sure: 20.0. 15
6 0
3 years ago
Read 2 more answers
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