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3 years ago

Hi I need help with this question please!!! I don’t understand it :/

Mathematics

2 answers:

Paladinen [302]3 years ago

7 0

The above answer is correct. Great job

elena-s [515]3 years ago

3 0

Answer:

- 22.5

Step-by-step explanation:

Substitute x = 3 into f(x) and x = 16 into h(x) , then

$\frac{1}{2}$ g(3) - h(16)

= $\frac{1}{2}$ × - 3(3)² - (2 $\sqrt{16}$ + 1)

= $\frac{1}{2}$ × - 3(9) - (2(4) + 1)

= $\frac{1}{2}$ × - 27 - (8 + 1)

= - 13.5 - 9

= - 22.5

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What operation is used in obtaining the succeding terms in an arithmetic sequence?

zhuklara [117]

Answer:

Answer C

Step-by-step explanation:

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4 0

3 years ago

In the diagram, the measure of angle 2 is 126°, the measure of angle 4 is (7x)°, and the measure of angle 5 is (4x + 4)°. A tran

kramer

Answer:

The correct option is C

C) 76°

Step-by-step explanation:

The question is incomplete because the figure is not given. I have attached the figure of the same question below. Consult it for better understanding.

We can see in the figure that <2 and <4 are opposite angles, therefore these are equal.

<2 = <4

126 = 7x

x = 18

Similarly we can also see that <5 and <7 are also opposite angles, therefore they are equal too.

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3 0

4 years ago

A school authority claims that the average height of students is 178 cm. A researcher has taken a well-designed survey and his s

Hunter-Best [27]

Answer:

d) The difference exists due to chance since the test statistic is small

Step-by-step explanation:

From the given information:

Population mean = 178 cm

the sample mean = 177.5 cm

the standard deviation = 2

the sample size = 25

The null hypothesis and the alternative hypothesis can be computed as:

Null hypothesis:

$H_o: \mu = 178$

Alternative hypothesis:

$H_1: \mu \neq 178$

The t-test statistics is determined by using the formula:

$t = \dfrac{X - \mu}{\dfrac{\sigma}{\sqrt{n}}}$

$t = \dfrac{177.5 - 178}{\dfrac{2}{\sqrt{25}}}$

$t = \dfrac{-0.5}{\dfrac{2}{5}}}$

$\mathbf{t= -1.25}$

Degree of freedom df = n- 1

Degree of freedom df = 25 - 1

Degree of freedom df = 24

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Decision rule: To reject the null hypothesis if the test statistics is greater than the critical value at 0.05 level of significance

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3 years ago

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