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KonstantinChe [14]
2 years ago
12

Plzzzzzzzz help meeeee

Mathematics
1 answer:
Pani-rosa [81]2 years ago
5 0

Answer:

38 in²

Step-by-step explanation:

The area (A) of a trapezium is calculated using the formula

A = \frac{1}{2} h (a + b)

where a, b are the parallel bases and h the perpendicular height

here a = 12, b = 7 and h = 4, hence

A = 0.5 × 4 × (12 + 7) = 2 × 19 = 38 in²

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Asap I really need help. Is the answer 1.54??!! Please help.
mylen [45]
No. Área of a circle is determined by this formula A=πr^2. Answer is 153.94
3 0
2 years ago
In a random sample of 8 ​people, the mean commute time to work was 35.5 minutes and the standard deviation was 7.4 minutes. A 90
konstantin123 [22]

Answer:

Margin of Error = 5.4088 ;

Confidence interval = (30.1 ; 40.9)

Interval estimate are almost the same

Step-by-step explanation:

Given that :

Population standard deviation, σ = 9.3

Sample size, n = 8

Xbar = 35.5

Confidence level = 90%

The confidence interval:

Xbar ± Margin of error

Margin of Error = Zcritical * σ/sqrt(n)

Zcritical at 90% = 1.645

Margin of Error = 1.645 * 9.3/sqrt(8) = 5.4088

Confidence interval :

Xbar ± Margin of error

35.5 ± 5.4088

Lower boundary = (35.5 - 5.4088) = 30.0912 = 30.1

Upper boundary = (35.5 + 5.4088) = 40.9088 = 40.9

(30.1 ; 40.9)

T distribution =. (30.5 ; 40.5)

Normal distribution = (30.1, 40.9)

4 0
3 years ago
Tell whether the ordered pair is a solution of the linear system (-24,-10)
Dovator [93]

Answer:

IT is not

Step-by-step explanation:

Let's replace. If it's a solution, it means that BOTH equations has to be true.

\left \{ {{-10=-5(-24)+22} \atop {-2(-24) +6(-10)=-12} \right.

Now, the second equations seems good - 48-60 =-12 indeed.

First alas isn't. RHS is 142, which is totally not the same as -10.

8 0
2 years ago
Need helping solving for CI
sattari [20]
I think it's 64 I'm not to sure I mean I did the math and that's what I got!
3 0
3 years ago
What is <br><img src="https://tex.z-dn.net/?f=40%20%5Cdiv%208" id="TexFormula1" title="40 \div 8" alt="40 \div 8" align="absmidd
andriy [413]

Answer:

the answer is 5

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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