All categories

3 years ago

PLEASE HELP!!!!!!! WILL GIVE BRANLIEST ANSWER IF CORRECT

Mathematics

1 answer:

Maksim231197 [3]3 years ago

8 0

The answer is the first one, because when you expand it you get -1/4 × 1, which equals -1/4, and -1/4 × -2y, which equals 1/2y. These are the same terms in the given expression -(1/2 + 1/4). I hope this helps!

You might be interested in

[GEOMETRY] HOW DO I SOLVE THIS

irina1246 [14]

All you have to do in this problem is subtract the bigger length from the smaller length

7 0

3 years ago

1. through (0,-1) slope= -1

nasty-shy [4]

Answer:

Step-by-step explanation:

I will give you equations in slope intercept form

y=-x-1

y= -2x - 6

4 0

3 years ago

Calculate the sample standard deviation of data from Question 1<br> 76,45,64,80,92

mash [69]

Answer:

$S.D = 15.98$

Step-by-step explanation:

Given: 76,45,64,80,92

Required: Determine the standard deviation

We start by calculating the mean

$Mean = \frac {\sum x}{n}$

Where x-> 76,45,64,80,92 and n = 5

$Mean = \frac {76+45+64+80+92}{5}$

$Mean = \frac{357}{5}$

$Mean = 71.4$

Subtract Mean (71.4) from each of the given data

$76 - 71.4 = 4.6\\45 - 71.4 = -26.5\\64 - 71.4 = -7.4\\80 - 71.4 = 8.6\\92 - 71.4 = 20.6$

Determine the absolute value of the above result

$|4.6| = 4.6\\|-26.5| = 26.5\\|-7.4| = 7.4\\|8.6| = 8.6\\|20.6| = 20.6$

Square Individual Result

$4.6^2 = 21.16 \\26.5^2 = 702.25\\7.4^2 = 54.76\\8.6^2 = 73.96\\20.6^2 = 424.36$

Calculate the mean of the above result to give the variance

$Mean = \frac {\sum x}{n}$

$Mean = \frac{21.16 + 702.25 + 54.76 + 73.96 + 424.36}{5}\\Mean = \frac{1276.49}{5}\\Mean = 255.298$

Hence, Variance = 255.298

Standard Deviation is calculated by $\sqrt{Var}$

$SD = \sqrt{255.298}$

$S.D = 15.9780474402$

$S.D = 15.98 (Approximated)$

6 0

3 years ago

State whether each percent of change is a percent increase or a percent decrease. Then find the percent of increase or decrease

Otrada [13]

Percent decrease. 41%
percent change= (new-old)/old *100
= -41 % the negative means decreasing

8 0

3 years ago

Which expression is equivalent to (2 + 6i)(5 + 2i)?

skelet666 [1.2K]

Answer:

c. -2 + 34i

Step-by-step explanation:

(2 + 6i)(5 + 2i)

c. -2 + 34i

4 0

3 years ago