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3 years ago

Which factor pair of -24 adds to give you 10?

Mathematics

1 answer:

lilavasa [31]3 years ago

5 0

Answer:

Step-by-step explanation:

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Find the value of sin -1(-1/2)

Anna71 [15]

Answer: I’m not a sinner ..

Step-by-step explanation:

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3 years ago

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Find the distance between the points (–1∕2,–8) and (–1∕2,–2).

kirza4 [7]

D because of the distance

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3 years ago

Alex and Josh rode bikes. Alex rode 15 miles in 55 minutes. Josh rode 77 minutes at a faster rate per mile than Alex. Find Alex'

Helga [31]

Answer:

a) $x = \frac{11}{3}\,\frac{min}{mi}$ , b) $y = \frac{77}{15}\,\frac{min}{mi}$

Step-by-step explanation:

a) The indicator is equal to the ratio of total time to travelled distance:

Alex

$x = \frac{55\,min}{15\,mi}$

$x = \frac{11}{3}\,\frac{min}{mi}$

b) In the case of Josh, the ratio must be greater than x. Then:

$y = \frac{77\,min}{15\,mi}$

$y = \frac{77}{15}\,\frac{min}{mi}$

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4 years ago

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,

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

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

6 0

3 years ago

What is the length of CD¯¯¯¯¯¯¯¯?

vladimir2022 [97]

Answer:

23 units

Step-by-step explanation:

Since both lines are chords, they're equal in length. This means we can set them equal to each other.

2x + 2x +2 = 15 + 8

This becomes 4x + 2 = 23.

Subtract two from each side to get 4x = 21.

Now divide by 4 to isolate x.

This makes x = 5.25.

Now we take the 5.25 and substitute it into the 2x + 2x + 2. This equals 23 units

6 0

3 years ago