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Rom4ik [11]
4 years ago
8

What is the value of y2 - x2 when y = 6 and x = 5

Mathematics
2 answers:
galina1969 [7]4 years ago
8 0

Y2 would equal 6•2 which is 12 and x2 would = 5•2 which is 10. Then you subtract them so the final equation would be 12-10=2

ANEK [815]4 years ago
5 0

Answer:

Step-by-step explanation:

y2 means your multiplying what y is by 2: 6*2=12

same with x: 5*2=10

12-10=2

I believe this is correct, but don't quote me on this.

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Sue at 30 cherries. She ate 5 times as many cherries as bob. How many cherries did bob eat
Fantom [35]

Answer:

6

Step-by-step explanation:

6 times 5 is 30. You would've divided 30 by 5

7 0
3 years ago
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I request assistance on answering this question
Ket [755]
The answer is going to be6/8
6 0
3 years ago
Y=x^2-4x+5<br><br> what is the vertex, domain, and range?
GarryVolchara [31]

Answer:

Hope this helps :) look at the picture because I dont know how to type that

Step-by-step explanation:

5 0
2 years ago
An article describes an experiment to determine the effectiveness of mushroom compost in removing petroleum contaminants from so
alexgriva [62]

Solution :

Let p_1 and p_2  represents the proportions of the seeds which germinate among the seeds planted in the soil containing 3\% and 5\% mushroom compost by weight respectively.

To test the null hypothesis H_0: p_1=p_2 against the alternate hypothesis  H_1:p_1 \neq p_2 .

Let \hat p_1, \hat p_2 denotes the respective sample proportions and the n_1, n_2 represents the sample size respectively.

$\hat p_1 = \frac{74}{155} = 0.477419

n_1=155

$p_2=\frac{86}{155}=0.554839

n_2=155

The test statistic can be written as :

$z=\frac{(\hat p_1 - \hat p_2)}{\sqrt{\frac{\hat p_1 \times (1-\hat p_1)}{n_1}} + \frac{\hat p_2 \times (1-\hat p_2)}{n_2}}}

which under H_0  follows the standard normal distribution.

We reject H_0 at 0.05 level of significance, if the P-value or if |z_{obs}|>Z_{0.025}

Now, the value of the test statistics = -1.368928

The critical value = \pm 1.959964

P-value = $P(|z|> z_{obs})= 2 \times P(z< -1.367928)$

                                     $=2 \times 0.085667$

                                     = 0.171335

Since the p-value > 0.05 and $|z_{obs}| \ngtr z_{critical} = 1.959964$, so we fail to reject H_0 at 0.05 level of significance.

Hence we conclude that the two population proportion are not significantly different.

Conclusion :

There is not sufficient evidence to conclude that the \text{proportion} of the seeds that \text{germinate differs} with the percent of the \text{mushroom compost} in the soil.

8 0
3 years ago
Choose the correct description of the graph of the compound inequality: (5 points)
skad [1K]

Answer:

D

Step-by-step explanation:

Firstly,  

≤  or  ≥  means closed circle, and

<   or >  means open circle

Now, let's solve the compound inequality:

x - 1 ≤ 7

x ≤ 8

and

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x ≥ 11

This solution means "everything left of 8 (inclusive and closed circle)" and "everything right of 11 (inclusive and closed circle)"

Looking at the choices, D is right.

4 0
4 years ago
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