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dexar [7]
3 years ago
15

What is an expression for 5(9m+2n-6m)

Mathematics
2 answers:
VARVARA [1.3K]3 years ago
8 0
45m+10n-30m
15m+10n 

What I got, let me know if you need something else, <3
Elis [28]3 years ago
6 0
45m+10n-30m
15m+10n

I believe this is right.
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Francisco’s recipe for cookies calls for 3/4 cups of sugar, 2 1/2 cups of flour and 3 eggs.If you want to use half as much sugar
LenaWriter [7]

Answer:

1.125

Step-by-step explanation:

(½ of ¾)×3

⅜×3 = 9/8 or 1 1/8 or 1.125 cups of sugar

8 0
3 years ago
a truck weighs 5,400 pounds. An open-wheel race car weighs 1/4 as much. how much does the race car weigh
gtnhenbr [62]
Since 1/4 is equal to 0.25 than you would do 5,400 times 0.25 and get the answer of 13,500.0. So the race car weighs 13,500 pounds.
3 0
3 years ago
Read 2 more answers
company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining a fleet average of at least 26
podryga [215]

Answer:

t=\frac{25.02-26}{\frac{4.83}{\sqrt{50}}}=-1.435    

p_v =P(t_{(49)}  

If we compare the p value and the significance level assumed \alpha=0.05 we see that p_v>\alpha so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can't conclude that the height of men actually its significant lower than 26 so then the specification is satisfied.

Step-by-step explanation:

Data given and notation  

\bar X=25.02 represent the sample mean

s=4.83 represent the sample standard deviation

n=50 sample size  

\mu_o =26 represent the value that we want to test

\alpha represent the significance level for the hypothesis test.  

t 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 is at least 26 mpg, the system of hypothesis would be:  

Null hypothesis:\mu \geq 26  

Alternative hypothesis:\mu < 26  

If we analyze the size for the sample is > 30 but 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

We can replace in formula (1) the info given like this:  

t=\frac{25.02-26}{\frac{4.83}{\sqrt{50}}}=-1.435    

P-value

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

df=n-1=50-1=49  

Since is a one sided test the p value would be:  

p_v =P(t_{(49)}  

Conclusion  

If we compare the p value and the significance level assumed \alpha=0.05 we see that p_v>\alpha so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can't conclude that the height of men actually its significant lower than 26 so then the specification is satisfied.

3 0
3 years ago
Solve : 1+8n=13+6n help???
ANTONII [103]
1+8n=13+6n
1+8n=13-6n
   -6n
1+2n=13
-1       -1
2n=12
2n divided by 2... 12 divided by 2 = 6... n=6
4 0
3 years ago
Read 2 more answers
Perpendicular lines AB and CD intersect at point E. If m ZAED = x+ 20, what is the value of ?
Mnenie [13.5K]

Answer: the value would be 90

Step-by-step explanation:

3 0
3 years ago
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