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KatRina [158]
3 years ago
15

Can you help me with these too? its for a geometry final practice plisss

Mathematics
2 answers:
nikklg [1K]3 years ago
5 0

Answer:

C. 57°

Step-by-step explanation:

All triangles have a sum of 180°.

m∠D + m∠E + m∠F = 180°

35° + m∠E + 88° = 180°

123° + m∠E = 180°

m∠E = 57°

zheka24 [161]3 years ago
3 0

Answer:

The answer is C!

Step-by-step explanation:

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Step-by-step explanation:

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3 years ago
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In a random sample of fivefive microwave​ ovens, the mean repair cost was ​$75.0075.00 and the standard deviation was ​$13.0013.
Radda [10]
<h2>Answer with explanation:</h2>

As per given , we have

Sample size : n= 5

Degree pf freedom = : df= 5-1=4

\mu=\$75.00

\sigma=\$13.00

Significance level for 90% confidence = \alpha=1-0.90=0.1

Using t-value table , t-critical value for 90% confidence:

t_{\alpha/2, df}=t_{0.05, 4}=2.132.

Margin of error of \mu: E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\(2.132)\dfrac{13}{\sqrt{5}}=12.3949720129\approx12.39

Interpretation : The repair cost will be within $12.39 of the real population mean value \mu 90% of the time.

7 0
3 years ago
Simplify the following expression a3b2 divided a2b
lesya [120]
<span><span> a3b2/a2b</span> </span>Final result :<span> ab3 </span>Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "a2"   was replaced by   "a^2".  2 more similar replacement(s).

Step by step solution :<span>Step  1  :</span><span> b2 Simplify —— a2 </span><span>Equation at the end of step  1  :</span><span><span> b2 ((a3) • ——) • b a2 </span><span> Step  2  :</span></span>Multiplying exponential expressions :

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3 0
3 years ago
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Given the functions, fx) = x - 8 and g(x) = x2 + x - 1, perform the indicated operation. When applicable, state the domain
adell [148]

Answer:

A

Step-by-step explanation:

(fg)(x) = f(x) × g(x)

= (x - 8)(x² + x - 1)

Each term in the second factor is multiplied by each term in the first factor, that is

x(x² + x - 1) - 8(x² + x - 1) ← distribute both parenthesis

= x³ + x² - x - 8x² - 8x + 8 ← collect like terms

= x³ - 7x² - 9x + 8 → A

There are no restrictions on the domain.

4 0
4 years ago
On one side of the balance scale, Henry placed a 6-gram weight. On the other side of the scale, he placed a ballet slipper.
olchik [2.2K]

Answer:

  • <u><em>A. 6,000 miligrams</em></u>

Explanation:

A <em>balance scale</em> is balanced when the weights on both sides are equal. Then, since the image shows that both sides are equal, the weight of the <em>6-gram weight</em>, placed by Henry on one side of the balance scale is equal to the weight of the <em>ballet slipper </em>placed on the other side.

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<u>Conversion of units: </u>

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That is the option A.

7 0
3 years ago
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