True false <br><br>1 line AC and DC =C<br>2 E lies on B<br>3 Points A,C,F are coplanar

PLEASE ANSWER SOON<br> Has a picture of question

earnstyle [38]

The answer is 21 which comes from 7 * 3.

Draw the four points in a complex plane. From the drawing you can see that the lenght is 4i - (-3i) = 4i + 3i = 7i, and the width is 1 - (-2) = 1 + 2 = 3.

So, the area is 7 * 3 = 21.

8 0

3 years ago

Solve the following 2 + 8 ÷ 2 x 3

mafiozo [28]

Answer:

Step-by-step explanation:

Solution,

Use the BODMAS Rule:

B = Bracket

O = Of

D = Division

M= Multiplication

A = Addition

S = Subtraction

Now,

Let's solve,

$2 + 8 \div 2 \times 3$

First we have to divide 8 by 2

$= 2 + 4 \times 3$

Calculate the product

$= 2 + 12$

Calculate the sum

$= 14$

Hope this helps...

Good luck on your assignment..

7 0

3 years ago

Read 2 more answers

A market research firm supplies manufacturers with estimates of the retail sales of their products from samples of retail stores

EastWind [94]

Answer:

$(52-49) -4.300= -1.300$

$(52-49) +4.300= 7.300$

And the 95% confidence would be :

$-1.300 \leq \mu_1 -\mu_2 \leq 7.300$

Step-by-step explanation:

We have the following info given from the problem

$\bar X_1 = 52$ sample mean for this year

$s_1= 13$ sample deviation for this year

$n_1 = 75$ random sample selected for this year

$\bar X_2 = 49$ sample mean for last year

$s_2= 11$ sample deviation for last year

$n_1 = 53$ random sample selected for last year

And we want to construct a 95% confidence interval estimate of the difference μ1−μ2, where μ1 is the mean of this year's sales and μ2 is the mean of last year's sales

For this case the formula that we need to use is:

$(\bar X_1 -\bar X_2) \pm t_{\alpha/2} \sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}$

The degrees of freedom are given by:

$df= n_1 +n_2 -2 = 75+53-2= 126$

The confidence level is 0.95 and the significance would be $\alpha=0.05$ and $\alpha/2 =0.025$ so then the critical value for this case is :

$t_{\alpha/2}= 1.979$

The margin of error would be:

$ME = 1.979 \sqrt{\frac{13^2}{75} +\frac{11^2}{49}}= 4.300$

And the confidence interval would be given by:

$(52-49) -4.300= -1.300$

$(52-49) +4.300= 7.300$

And the 95% confidence would be :

$-1.300 \leq \mu_1 -\mu_2 \leq 7.300$

6 0

3 years ago

Three times the sum of a number and seven, all divided by four?

Studentka2010 [4]

Answer:

Step-by-step explanation:

[3(x+7)]/4

8 0

3 years ago

What equation can be written from this sequence? -50, -33, -16, 1

Kaylis [27]

-50 + 17 = - 33
-33 + 17 = -16
- 16 +17 =1

This is arithmetic sequence, where 1st term is -50,
and common difference is 17.
Formula for the term of arithmetic sequence
a(n) = a(1) +d(n-1) = -50 +17(n-1) = -50 +17n - 17 = -67 +17n

So, we can write a formula
a(n) = -67 +17n

7 0

3 years ago

True false 1 line AC and DC =C2 E lies on B3 Points A,C,F are coplanar​

True false 1 line AC and DC =C2 E lies on B3 Points A,C,F are coplanar