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3 years ago

How do I evaluate an expression?

Mathematics

1 answer:

evablogger [386]3 years ago

8 0

Answer:

Yes, 100,000 will be the answer.

Step-by-step explanation:

We are given an expression in the word problem as:

“A cooking website claims to have $10^5$ recipes ".

We know that the representation of the number $10^5$ in it's expanded form is: $100000$

Hence, the evaluation of the given expression is $100000$ .

<em>so, Yes, 100,000 will be the answer.</em>

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In order to estimate the average electric usage per month, a sample of 81 houses was selected and the electric usage was determi

lana [24]

Answer:

Confidence interval: (1760,1956)

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 81

Sample mean =

$\bar{x} = 1858 \text{ kWh}$

Population standard deviation =

$\sigma = 450 \text{ kilowatt-hours}$

Confidence Level = 95%

Significance level = 5% = 0.05

Confidence interval:

$\bar{x} \pm z_{critical}\displaystyle\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96$

$1858 \pm 1.96(\displaystyle\frac{450}{\sqrt{81}} ) = 1858 \pm 98 = (1760,1956)$

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2 years ago

Help find the inequalities of these problems! Plz & thank you!!

mariarad [96]

Answer:yes imStep-by-step explanation:

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2 years ago

Find the slope of the line that passes through the origin and the point (-2,5).

Mekhanik [1.2K]

<u>Slope -2/5.</u>

Answer:

Solution given:

(x1,y1)=(0,0)

(x2,y2)=(-2,5)

now

slope =(x2-x1)/(y2-y1)=(-2-0)/(5-0)=-2/5

7 0

2 years ago

Can I have help on this please

irinina [24]

Angles C and D are supplementary, meaning they add up to 180 degrees. So, if we add 8u-48 to 5u+46, we get 13u-2. We set that equal to 180, so 13u-2=180. Add the two, so 13u=182. Divide the 13, so u=14. To double check, plug in 14 to both expressions. 8(14)-48 and 5(14)+46. 8(14)-48 is 64. 5(14)+46 is 116. If you add 64+116, you get 180, which proves your answer right! So u= 14

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3 years ago

Problem :

notsponge [240]

400 - 2 x Age = 244
-2*Age = -156
Age = 78 years

3 0

2 years ago

Read 2 more answers