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4 years ago

Someone please help ?

Mathematics

1 answer:

ikadub [295]4 years ago

8 0

a. 1490

5 x 37.25= 186.25

186.25 x 8 = 1,490

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∠1 is a complement of ∠2, and m∠1=68∘. ∠2 is a supplement of ∠3. Find m∠3.

Airida [17]

Answer:

m∠3 = 158°

Step-by-step explanation:

Angles one and two are complementary angles.

Complementary angles add up to 90°. Given the measurement of ∠1:

68° + m∠2 = 90°

68° - 68° + m∠2 = 90° - 68°

m∠2 = 22°

Angles 2 and 3 are supplementary angles.

Supplementary angles add up to 180°.

22° + m∠3 = 180°

22° + m∠3 = 180° - 22°

m∠3 = 158°

Hope this helps.

4 0

4 years ago

Read 2 more answers

What are the Solutions to the system of equations?

mamaluj [8]

Answer:

Step-by-step explanation:

to find the "solution" to this system, set f=g.

then we get: $f(x)=g(x)=2x+1=x^2+2x-8$

$=x^2-9=(x+3)(x-3)\\\\x=-3,3\\$

plugging in 3,-3 for x in both equations, we get:

(3,7),(-3,-7),(-3,-5)

4 0

3 years ago

Write 257% as decimal

SCORPION-xisa [38]

Answer:

<u><em>please mark brainliest!</em></u>

Step-by-step explanation:

2.57

5 0

4 years ago

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Assume that all conditions are met. The mean of the differences was 1. 33 and the standard deviation of those differences was 2.

Maurinko [17]

The test statistic for this procedure is using two sample T-test is 0.458.

Definition of Two Sample T-test

A variation of the Student's t-test used to determine if two sample means are substantially different is known as the two sample T-test (also known as Welch's t-test, Welch's adjusted T, or unequal variances t-test). The test's degrees of freedom have been changed, which generally boosts the test's power for samples with unequal variance.

T-Test Statistic for The Procedure

It is given that mean of the differences = 1.33

And, the standard deviation of the differences, standard error = 2.90

The test static formula is given as,

t = (estimate - hypothized value) / standard error

Here, t is the t- test statistic, and estimate is the mean of the differences.

Since it is given that all conditions are met, the hypothized value can be taken as 0

Substituting substituting estimate = 1.33 and standard error = 2.90 in the t-test statistic formula, we get,

t = (1.33-0)/2.90

or t = 0.458

learn more about t-test here:

brainly.com/question/14128303

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8 0

2 years ago

Answer step by step

enot [183]

Consider, please, this solution/explanation:
1. suppose, that number of cars is 'x', numbers of buses is 'y'.
2. according to the condition 'a total of 32', it means that x+y=32. This is the 1st equation.
3. according to the condition in one car are 3x persons, in one bus are 27y persons, and totaly 3x+27y=408 people. This is the 2d equation.
4. if to solve the system of two equations:
$\left \{ {{x+y=32} \atop {3x+27y=408}} \right. \ =\ \textgreater \ \ \left \{ {{x=19 (cars)} \atop {y=13(buses)}} \right.$

Answer: 13 - b., 19 - c.

6 0

3 years ago