WILL MARK BRAINLIEST!

Cuanto es r2-2r-7=0

vekshin1

Answer:

Step-by-step explanation:

The solution is attached

6 0

2 years ago

An expressions is shown. what is the value of the expression? 2315.5+(-3166.75)

Zepler [3.9K]

Adding a negative number is the same as subtracting a positive number. So 2315.5 - 3166.75 = -851.25

7 0

2 years ago

The graph of a quadratic polynomial intersects x-axis at the points (-4, 0) and (5, 0). Find

Setler79 [48]

Answer:

Quadratic polynomial is x^2 - x - 20

3 0

1 year ago

In 0.73, in which place is the 0

Svetllana [295]

Answer:

The digit '0' is in the ones place.

6 0

2 years ago

Read 2 more answers

The mayor of a town has proposed a plan for the construction of a new community. A political study took a sample of 800 voters i

Hunter-Best [27]

Answer:

A political strategist wants to test the claim that the percentage of residents who favor construction is more than 30%, so then that represent our claim and needs to be on the alternative hypothesis.

Based on this the correct system of hypothesis are:

Null hypothesis: $p \leq 0.3$

Alternative hypothesis $p >0.3$

Step-by-step explanation:

We have the following info given from the problem:

$n= 800$ the random sample of voters selected from the town

$\hat p = 0.34$ represent the proportion of residents favored construction

$p_o = 0.30$ represent the value desired to test.

A political strategist wants to test the claim that the percentage of residents who favor construction is more than 30%, so then that represent our claim and needs to be on the alternative hypothesis.

Based on this the correct system of hypothesis are:

Null hypothesis: $p \leq 0.3$

Alternative hypothesis $p >0.3$

And in order to test this hypothesis we can use a one sample z test for a population proportion and the statistic would be given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

And with the data given we have:

$z=\frac{0.34 -0.3}{\sqrt{\frac{0.3(1-0.3)}{800}}}=2.469$

7 0

2 years ago