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kari74 [83]
3 years ago
6

I need help ASAP

Mathematics
1 answer:
3241004551 [841]3 years ago
3 0

1/7-9/7n+6/7

1-9/7n

that is the extended form and is simplified

Hope it help! :)

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I need help with this
fenix001 [56]

Answer:

d=13

Step-by-step explanation:

step 1) combine like terms

8d-3d-12=53

5d-12=53

isolate d

5d-12+12=53+12

5d=65

d=13

8 0
2 years ago
Read 2 more answers
9-(6x+1)=3x+8 what is it thank you
Jobisdone [24]

Answer:

0=x

Step-by-step explanation:

9-(6x+1)=3x+8

9-6x-1=3x+8

9-8-1=3x+6x

9-9=9x

0=9x

0÷9=x

0=x

5 0
3 years ago
A theory predicts that the mean age of stars within a particular type of star cluster is 3.3 billion years, with a standard devi
Luden [163]

Answer:

Null hypothesis:\mu \leq 3.3  

Alternative hypothesis:\mu > 3.3  

z=\frac{3.4-3.3}{\frac{0.4}{\sqrt{50}}}=1.768  

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

p_v =P(z>1.768)=0.039  

Step-by-step explanation:

Data given and notation

\bar X=3.4 represent the sample mean  

\sigma=0.4 represent the population deviation for the sample

n=50 sample size  

\mu_o =3.3 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 to be tested  

We need to conduct a hypothesis in order to determine if the mean is higher than 3.3, the system of hypothesis would be:  

Null hypothesis:\mu \leq 3.3  

Alternative hypothesis:\mu > 3.3  

Compute the test statistic  

We know the population deviation, so for this case is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

z-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".  

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

z=\frac{3.4-3.3}{\frac{0.4}{\sqrt{50}}}=1.768  

P value

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

p_v =P(z>1.768)=0.039  

6 0
3 years ago
The graph shows the solution to a system of inequalities:
tangare [24]

Answer:

Option A. 4x+3y\leq 12 and x\geq 0

Step-by-step explanation:

we know that

The solution of the first inequality is the shaded area below the solid line 4x+3y=12

The solid line passes through the points (0,4) and (3,0) (the y and x intercepts)

therefore

The first inequality is

4x+3y\leq 12

The solution of the second inequality is the shaded area to the right of the solid line x=0

therefore

The second inequality is

x\geq 0

7 0
3 years ago
If the area of a triangle is 48 cm2 and the base of the
makvit [3.9K]

Answer:

8

Step-by-step explanation:

Formula for height of triangle

A÷BX2

In this case, 48÷12=4×2=8

Hope you understand ☺️

4 0
3 years ago
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