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2 years ago

What’s the measure o angle 1 if angle 4 is 155 degrees

Mathematics

1 answer:

balu736 [363]2 years ago

7 0

Answer:I pretty sure it’s 25 degrees

Step-by-step explanation:

Cause you have to divide the angle by 4

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Can someone plz help me I’m being timed!!!!

nikklg [1K]

Answer:

49 and 58

Step-by-step explanation:

pls brainliest

7 0

3 years ago

Read 2 more answers

Basil earned 631.40 in 7 years on an investment at a 5.5% simple interest rate. How much was basils investment

8090 [49]

7 * 0.055 = 0.385

631.40 / 0.385 = $1,640

7 0

4 years ago

it takes 10.4 hours to receive a basic flying license. A new license training method using Computer Aided Instruction (CAI) has

Anastasy [175]

Answer:

Test statistic (t) = 0.625

Step-by-step explanation:

Step(i):-

mean of the Population(μ) = 10.4 hours

Sample mean (x⁻) = 10.7 hours

Standard deviation of the sample( S) = 1.44

The level of significance (α= 0.1

Sample size 'n' = 9

Degrees of freedom = n-1 = 9-1 =8

Step(ii):-

Test statistic

$t = \frac{x^{-} -mean}{\frac{S}{\sqrt{n} } }$

$t = \frac{10.7 -10.4}{\frac{1.44}{\sqrt{9} } } =0.625$

8 0

3 years ago

Why do we prefer the t procedures to the z procedures for inference about a population mean? Group of answer choices z requires

denis-greek [22]

Answer:

Correct option:

"z requires that you know the population standard deviation σ which may be unrealistic."

Step-by-step explanation:

The hypothesis test for significant population mean μ can be done either using the z-distribution of t-distribution.

Both the distribution require certain conditions to be fulfilled to use.

For using a z-distribution to perform a hypothesis test for μ the conditions to fulfilled are:

Population is Normally distributed.
The population standard deviation is known.
The sample selected is large.

For using a t-distribution to perform a hypothesis test for μ the conditions to fulfilled are:

Population is Normally distributed.
The sample selected is randomly selected.

If the population standard deviation is not known and we have to compute the sample standard deviation then use the t-distribution to perform the test for population mean.

Thus, the correct option is:

"z requires that you know the population standard deviation σ which may be unrealistic."

5 0

4 years ago

Stephanie wants to buy her brother some UGA clothes before he starts school there. She has $55 to spend on him. The hats are $10

Anna35 [415]

Answer:

Part a: $10h + $15s ≤ $55

Part b: She can buy 3 shirts

Step-by-step explanation:

Part a: Write an equation to model the situation

Stephanie has $55 to spend. Assume that hats are h, and shirts are s.

She can buy h hats for $10 each, represented as $10h

She can s shirts for $15 each, represented as $15s

She cannot spend more than $55

So that means $10h + $15s ≤ $55

It has to be less than or equal to because she can spend less money or $55 on her brother.

Part b: if she buys 1 hat, how many shirts can she buy?

Lets use our equation from part a

$10h + $15s ≤ $55

replace for for h because she bought 1 hat

$10 + $15s ≤ $55

Solve:

$10 + $15s ≤ $55

$15s ≤ $45

s ≤ 3

She can buy 3 shirts

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

4 0

3 years ago