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Andrew [12]
3 years ago
5

MATHAnswer and I will give you brainiliest Answer and I will give you brainiliest ​

Mathematics
1 answer:
Triss [41]3 years ago
7 0

Answer:

I don't now this but you should do pemdas that really helped me

Step-by-step explanation:

The first step is perthansies  then exponents and then multiplication then division and last addition and subtraction that should give you your answer.

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The lengths of text messages are normally distributed with a population standard deviation of 4 characters and an unknown popula
umka21 [38]

Answer:

The answer is "(25.32, 30.68)"

Step-by-step explanation:

Given:

\bar x = 28\\\\ \sigma = 4\\\\n =26\\\\

When 98\% confidence level so, the z:

\alpha = 1 - 98\% = 1 - 0.98 = 0.2\\\\\frac{\alpha}{2} =\frac{0.02}{2} = 0.01\\\\Z_{\frac{\alpha}{2}} = Z_{0.01} = 1.645\ \ \  ( Using \ z \ table )\\\\

E = Z_{\frac{\alpha}{2} \times ( \frac{\sigma}{\sqrt{n}})  

= 1.645 \times (\frac{4}{\sqrt{26}})\\\\=2.68

When  98% confidence interval estimate of the population mean  is,

\bar x - E < \mu < \bar x + E\\\\28 - 2.68 <  \mu < 28 + 2.68\\\\25.32 <  \mu < 30.68\\\\(25.32,  30.68)\\\\

7 0
3 years ago
Find the inverse of the function.<br> y = 2x2 -4
OleMash [197]

Answer: y=\sqrt[]{\frac{x+4}{2} }

Step-by-step explanation:

y=2x^2-4\\x=2y^2-4\\x+4=2y^2\\\frac{x+4}{2}=y^2\\ y=\sqrt[]{\frac{x+4}{2} }

3 0
3 years ago
In the diagram, BC¯¯¯¯¯∥DE¯¯¯¯¯ . What is AE ?
fenix001 [56]
Write  a ratio... i think 6/1 cross multiply x/3 if im correct im guessing
4 0
4 years ago
A trapezoid has bases of lengths 20 and 46. Find the trapezoid's area if its height is 10.
77julia77 [94]

Answer:

330

Step-by-step explanation:

3 0
4 years ago
If y = 3x +1 were changed to y = x+1, how would the graph of the new function
nikitadnepr [17]

Answer:

Step-by-step explanation:

The standard form of a linear equation, a line, is y = mx + b, where m is the slope. The rule is the higher this value of m, the steeper the graph is. If we have the original equation y = 3x + 1, its slope m is 3; in the "new" equation, y = x + 1, its slope is 1. So the "new" equation would be less steep because the slope is a lower value than the original.

7 0
3 years ago
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