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3 years ago

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Question 4 of 10

1 answer:

Blababa [14]3 years ago

3 0

A or c am not completely sure I am 90% sure or is I

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Find the missing term and the missing coefficient of the following equation: (6a −______)5a =______a^2 − 35a

sergiy2304 [10]

The missing term in the left side of the equation is 7. Therefore:

(6a-7)5a

On the other hand, the missing coefficient in the right side of the equation is 30. Therefore,

30a^2 - 35a

Combining the left and right sides of the equation:

(6a-7)5a = 30a^2-35a

I hope my answer has come to your help. Thank you for posting your question here in Brainly.

5 0

3 years ago

Read 2 more answers

In a Pew Research Center poll of 745 randomly selected adults, 589 said that it is morally wrong to not report all income on tax

Nikolay [14]

Answer:

a

The null hypothesis is $H_o : p = 0.75$

The alternative hypothesis is $H_a : p \ne 0.75$

b

$t = 2.51$

c

$p-value = 0.01207$

d

There no sufficient evidence to conclude that 75% of adults say that it is morally wrong to not report all income on tax returns

Step-by-step explanation:

From the question we are told that

The sample size is $n = 745$

The number that said it is morally wrong is $k = 589$

The level of significance is $\alpha = 0.01$

The population proportion is $p = 0.75$

Generally the sample proportion is mathematically represented as

$\r p = \frac{k}{n}$

=> $\r p = \frac{589}{745}$

=> $\r p = 0.79$

The null hypothesis is $H_o : p = 0.75$

The alternative hypothesis is $H_a : p \ne 0.75$

The standard error is mathematically represented as

$SE = \sqrt{\frac{p(1-p)}{n} }$

=> $SE = \sqrt{\frac{0.75(1-0.75)}{745} }$

=> $SE =0.0159$

Generally the test statistics is mathematically represented as

$t = \frac{\r p - p }{SE}$

=> $t = \frac{0.79 - 0.75 }{0.0159}$

=> $t = 2.51$

Generally the p-value is mathematically represented as

$p-value = 2 * P(Z > 2.51)$

From the the z-table

$P(Z > 2.51) = 0.0060366$

=> $p-value = 2 * 0.0060366$

=> $p-value = 0.01207$

From the calculation $p-value >\alpha$

Hence we fail to reject the null hypothesis

Thus there no sufficient evidence to conclude that 75% of adults say that it is morally wrong to not report all income on tax returns

7 0

3 years ago

Some students spend these amounts in a cafe. £2.50, £3, £1, £4, £0.50,

maks197457 [2]

Step-by-step explanation:

For finding range we will arrange it from least to greatest

0.50 1 1 1 1 2.50 2.50 3 4

So range = 4 - 0.50 = 3.50

6 0

4 years ago

Can you guys help me with this

nikdorinn [45]

Answer:

11) 40

12)113

13) 105

11) 180-65-75

12) 180 - (180-62-51)

13) 360-100-60-95

5 0

3 years ago

Read 2 more answers

Express the complex number z = -4+3i in polar form: r(cos⁡(θ)+i sin(θ)).

kirill [66]

Answer:

5( cos(- 0.64)+ $i$ sin(-0.64))

Step-by-step explanation:

Given:

z = -4+3i

$r=\sqrt{(-4)^2+3^2}= 5$

θ= $tan^-^1(\frac{3}{-4} ) = -0.64$

Polar form=r(cosθ+ $i$ sinθ)=> 5( cos(- 0.64)+ $i$ sin(-0.64))

8 0

3 years ago