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sattari [20]
3 years ago
12

WILL GIVE BRAINLIEST! help please just answer whichever question you can, but tell me which number the question is.

Mathematics
1 answer:
mezya [45]3 years ago
7 0

Answer:

16. D

if you add 3 odd numbers you get an odd one like

23,47,3 which give you 75.

If you add 2 odd numbers and one even it gives you an even result, like

23,47,2 which gives you 72.

When adding 2 even and one odd it gives you an odd number,

22,14,3 gives you 39

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A researcher surveyed 220 residents of a city about the number of hours they
olga55 [171]

Answer:

Margin of error of 0.0485 hours.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

In this question:

\sigma = 0.35, n = 220

The margin of error is of:

M = z\frac{\sigma}{\sqrt{n}}

M = 1.96\frac{0.35}{\sqrt{200}}

M = 0.0485

Margin of error of 0.0485 hours.

5 0
3 years ago
Line a is purpendicular to line b. if the slope of line a is 7 than what is the slope of line b
MA_775_DIABLO [31]

The slope of the perpendicular line b is -1/7 if the slope of the perpendicular line a is 7.

According to the question,

Line 'a' is perpendicular to the line 'b'. If the slope of the line 'a' is 7.

The condition of slopes if two lines are perpendicular m₁ m₂ = -1

(7)(m₂) = -1

   m₂ = -1/7

Hence, the slope of the perpendicular line b is -1/7 if the slope of the perpendicular line a is 7.  

Learn more about perpendicular lines here

brainly.com/question/2505127

#SPJ4

8 0
2 years ago
F(x)=|x-5|+2<br><br> Evaluate f(3).<br><br> A.) 10<br> B.) 0<br> C.) 4<br> D.) 6
Talja [164]
F(x)=|x-5|+2
plug it in

so f(3)
f3)=|3-5|+2
solve whats inside first
|-2|+2
since its absolute value its actually positive
2+2
4

Your answer is C.) 4
4 0
3 years ago
Which coordinates represent a translation of B (1,2) 3 units to the left and 2 units up
alexandr402 [8]

Answer:

(-2,4)

Step-by-step explanation:

By going 3 back you go 0,-1,-2 then you are already up 2 so if you go up 2 more you are at (-2,4). Hope this helps!

6 0
2 years ago
Simplify the expression where possible.<br><br> (r -3s 2t ) 4
igor_vitrenko [27]
The answer to (r -3s2t)4 is 4r- 24st
4 0
3 years ago
Read 2 more answers
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