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2 years ago

Identify whether each phrase is an expression, equation, or inequality.

Mathematics

1 answer:

Oksi-84 [34.3K]2 years ago

6 0

Answer:

We need to see the phrases

Step-by-step explanation:

Show us the phrases

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In ΔRST, the measure of ∠T=90°, the measure of ∠R=39°, and TR = 55 feet. Find the length of ST to the nearest tenth of a foot.

kolbaska11 [484]

<u>Answer:</u>

<u>Explanation:</u>

given:

∠T=90° , ∠R=39° and TR = 55 ft

ST = 55×tan(39)

ST = 55×0.80..

ST = 44.54 ft

7 0

3 years ago

A random sample of 10 parking meters in a beach community showed the following incomes for a day. Assume the incomes are normall

Vlad1618 [11]

Answer: (2.54,6.86)

Step-by-step explanation:

Given : A random sample of 10 parking meters in a beach community showed the following incomes for a day.

We assume the incomes are normally distributed.

Mean income : $\mu=\dfrac{\sum^{10}_{i=1}x_i}{n}=\dfrac{47}{10}=4.7$

Standard deviation : $\sigma=\sqrt{\dfrac{\sum^{10}_{i=1}{(x_i-\mu)^2}}{n}}$

$=\sqrt{\dfrac{(1.1)^2+(0.2)^2+(1.9)^2+(1.6)^2+(2.1)^2+(0.5)^2+(2.05)^2+(0.45)^2+(3.3)^2+(1.7)^2}{10}}$

$=\dfrac{30.265}{10}=3.0265$

The confidence interval for the population mean (for sample size <30) is given by :-

$\mu\ \pm t_{n-1, \alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given significance level : $\alpha=1-0.95=0.05$

Critical value : $t_{n-1,\alpha/2}=t_{9,0.025}=2.262$

We assume that the population is normally distributed.

Now, the 95% confidence interval for the true mean will be :-

$4.7\ \pm\ 2.262\times\dfrac{3.0265}{\sqrt{10}} \\\\\approx4.7\pm2.16=(4.7-2.16\ ,\ 4.7+2.16)=(2.54,\ 6.86)$

Hence, 95% confidence interval for the true mean= (2.54,6.86)

7 0

3 years ago

Add the two expressions.<br> 69 + 1 and q + 11<br> Enter your answer in the box.<br> Please help!!

Pavlova-9 [17]

Answer:

l think the answer is 81q

3 0

3 years ago

Y = 4(x–3) + 7<br> What is the Horizontal<br> Asymptote?

Tema [17]

Answer:

y = 4(x-3) + 7

4x-3 + 7

+3. +3

_____________

4x. 10

4. 4

_______________

x = 2.5

Horizontal Asymptote are horizontal lines the graph approaches

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3 years ago

Evaluate 3m2 -4 if m = -3

zhenek [66]

Answer:

Step-by-step explanation:

$3m^{2} - 4 = 3 * (-3)^{2} - 4 = 3 * 9 - 4 = 27 - 4 = 23$

8 0

2 years ago