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Andrej [43]
3 years ago
14

Use properties to find the sum or product 93+(68+7)

Mathematics
1 answer:
Vlad [161]3 years ago
3 0

Answer:

Step-by-step explanation:

93+(75)

= 168

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What is the slope of the line shown below?
frozen [14]

Answer:

2

Step-by-step explanation:

Given two points on the line, we can use the slope formula

m = ( y2-y1)/(x2-x1)

    = ( 7 - -3)/(3 - -2)

    = (7+3)/(3+2)

    = 10/5

    =2

5 0
3 years ago
Read 2 more answers
An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California. Suppose that
yuradex [85]

Answer:

The 85% confidence interval for the mean per capita income in thousands of dollars is between $20.4 and $21.8.

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{1-0.85}{2} = 0.075

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

So it is z with a pvalue of 1-0.075 = 0.925, so z = 1.44

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.

M = 1.44\frac{12.6}{\sqrt{717}} = 0.7

The lower end of the interval is the sample mean subtracted by M. So it is 21.1 - 0.7 = $20.4.

The upper end of the interval is the sample mean added to M. So it is 21.1 + 0.7 = $21.8.

The 85% confidence interval for the mean per capita income in thousands of dollars is between $20.4 and $21.8.

5 0
3 years ago
Each lenght is in metres Calculate DC​
Gnom [1K]

Step-by-step explanation:

ED is greater than BC

the line from B to ED ^ (which i drew ) the point it touches ED name it X. so EX will be 2 ( ED-BC)(6-4).

then u have a triangle. EX, XB and EB.

you have length of EX(2) and u have hypotenuse. so u can calculate XB using Pythagoras theorem.

15.1²=2²+XB²

15.1²-2²=XB²

224.01=XB²

XB=14.97

since XB and DC are parallel ( a rectangle is forming XBCD) so DC is also 14.97

6 0
4 years ago
PLEASE HELP!!
tino4ka555 [31]
<span>its D.
y=3x^2+12x

its the answer
</span>
7 0
3 years ago
Need help with these 3 plz
raketka [301]
I feel like I know that but I don’t wanna give you the wrong answer
8 0
3 years ago
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