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3 years ago

Solve for x.

Mathematics

1 answer:

Katen [24]3 years ago

7 0

Answer:

Step-by-step explanation:

The external angle of a triangle is equal to the sum of the opposite interior angles

18x+9 = 5x-5 + 105

Combine like terms

18x+9 = 5x +100

Subtract 5x from each side

18x-5x +9 = 5x+100-5x

13x +9 = 100

Subtract 9 from each side

13x +9-9=100-9

13x= 91

Divide by 13

13x/13 = 91/13

x = 7

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1 year ago

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A supervisor records the repair cost for 22 randomly selected VCRs. A sample mean of $75.50 and standard deviation of $18.07 are

VashaNatasha [74]

Answer:

The t value for 99% CI for 21 df is 2.831.

The critical value that should be used in constructing the confidence interval is (64.593, 86.407).

Step-by-step explanation:

Now the sample size is less than 30 and also population standard deviation is not known.

Then we will use t distribution to find CI

t value for 99% CI for 21 df is TINV(0.01,21)=2.831

The margin of error is $E=t\times\frac{s}{\sqrt{n}}\\\\=2.831\times\frac{18.07}{\sqrt{22}}\\\\=10.907$

Hence CI is $CI=\overline{x} \pm E\\\\ =75.50 \pm 10.907\\\\=(64.593,86.407 )$

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2 years ago

What is the value of w? <br> Answer options: 100, 75, 40, 52.5

Arisa [49]

<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ Opposite angles in a cyclic quadrilateral total to 180 degrees

180 - 80 = 100

w = 100 degrees

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

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3 years ago

What number has 3 ones, 8 tens, and 5 hundreds?

PtichkaEL [24]

Answer:

C: 583

Step-by-step explanation:

5(100)+8(10)+3(1)

500+80+3= 583

Hope this helps! :)

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3 years ago

Kari is saving money to buy a car. To purchase the car that she wants she will need to have at least a $5000 down payment. If Ka

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Answer:

C ) She needs to save AT LEAST 20 months

Step-by-step explanation:

Half of her income each month is $250

m= months

250m ≥ 5000

m≥ 20

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2 years ago