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3 years ago

Please help asap i will give brainliest

Mathematics

2 answers:

trapecia [35]3 years ago

7 0

Answer:

area is 20

Step-by-step explanation:

Nostrana [21]3 years ago

3 0

Answer:

20 units squared

Step-by-step explanation:

4(base) x 10(height) = 40

40 / 2 = 20

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A campaign strategist wants to determine whether demographic shifts have caused a drop in allegiance to the Uniformian Party in

Bas_tet [7]

Answer:

d. There is not enough evidence to support the hypothesis that the proportion of Uniformian voters has decreased.

Step-by-step explanation:

This is a hypothesis test for a proportion.

The claim is that there is a significant drop in allegiance to the Uniformian Party in Bowie County.

Then, the null and alternative hypothesis are:

$H_0: \pi=0.62\\\\H_a:\pi$

The significance level is 0.05.

The sample has a size n=196.

The sample proportion is p=0.57.

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.62*0.38}{196}}\\\\\\ \sigma_p=\sqrt{0.001202}=0.035$

Then, we can calculate the z-statistic as:

$z=\dfrac{p-\pi+0.5/n}{\sigma_p}=\dfrac{0.57-0.62+0.5/196}{0.035}=\dfrac{-0.047}{0.035}=-1.369$

This test is a left-tailed test, so the P-value for this test is calculated as:

$\text{P-value}=P(z$

As the P-value (0.0855) is greater than the significance level (0.05), the effect is not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that there is a significant drop in allegiance to the Uniformian Party in Bowie County.

6 0

3 years ago

Explain how you know each fraction is equivalent .49

Lady bird [3.3K]

You have to cross multiply
1/2=2/4
(1*4)=(2*2)
4=4

4 0

3 years ago

How to solve this one

brilliants [131]

If the blue piece is half of the length of green, which is 12, then the blue piece would be 6cm long. 12 + 6 would represent the total length of both pieces, which is 18.

8 0

4 years ago

Read 2 more answers

A lifeguard station is 6 meters higher than the shore of a lake. The bottom of the lake is 12 meters below the lake’s shore. On

sergiy2304 [10]

The answer is C

The absolute value of a number is simply the positive version of that number. So, if a number is already positive the absolute value does nothing, else it switches its sign.

This is easier done than said: we have $|6| = 6$ and $|-12|=12$ . And since $6$ , C is correct. Let's see why the others are wrong:

Option A translates to $6>12$

Option B translates to $6=12$

Option D translates to $6>12$

3 0

3 years ago

Can someone help me with this pls!!!!!

almond37 [142]

Answer: 11.) -6. 12.) 4/5

For the square roots, there should be a plus&minus sign but my keyboard doesn't have that.

13.) 3 14.) 8

explanation: For a square root, you are looking for a number that was multiplied by itself to become the number under the radical.

11 is a bit tricky since there is a negative sign before the radical. 6×6=36 -6 × -6 = 36. It seems they want only the -6 here.

4/5 ×4/5 = 16/25

For cube root, you need the number that is multiplied by itself three times. 3×3×3 = 27 8×8×8=512

4 0

3 years ago