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anyanavicka [17]
3 years ago
15

Simplify the expression 5i(6-8) A. 40-30i B. 40+30i C. -30+40i D. 30+40i

Mathematics
1 answer:
Mice21 [21]3 years ago
7 0

Answer:

D hope this helps :)

Step-by-step explanation:

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tiana's car travel 111 miles on 3/8 of a tank of gas. how far will she be able to go on a full tank of gas?
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Turn the 3/8 itto a mixed number and dived it by 111 
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A group of 6 friends of varying ages meets at a coffee shop and sits in a circle. What is the probability that the
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1 out of 6

Step-by-step explanation:

So basically the shortest is one person in the group of six aand 1/6 cant be simplified so yeah

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If P(-4,-2) and Q(1, -3) represent points in a coordinate
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Step-by-step explanation:

4 0
3 years ago
A bivariate data set has x = 21, sx = 13, y = 55, sy = 27, and r = .88. What is the equation for the regression line of y on x?
earnstyle [38]

Answer:

c) y=16.57+1.83x

Step-by-step explanation:

Equation for regression line of y on x is given as

\hat{y}=mx+b --- (1)

where

\hat{y} = predicted value

m = slope of line

b = intercept

m and b are found as

m=r\frac{S_{y}}{S_{x}}---(2)\\\\b=\bar{y}-m\bar{x}---(3)

r = correlation coefficient = 0.88

Sx = standard deviation for independent variable x = 13

Sy = standard deviation for dependent variable y = 27

\bar{x} = mean value of independent variable x = 21

\bar{x} = mean value of dependent variable y = 55

Substituting these values in (2) and (3)

m=r\frac{S_{y}}{S_{x}}\\\\m=(0.88)\frac{27}{13}\\\\m=1.83

b=\bar{y}-m\bar{x}\\\\b=55-(1.827)(21)\\\\b=16.57

Putting these values of m and b in (1)

y=1.83x+16.57

5 0
3 years ago
On Saturday, 150 people at a movie theater purchased popcorn, and 350 people did not purchase popcorn. What percentage of people
MaRussiya [10]

Answer:

<u>70%</u> of people did not order popcorn at the movie theater on Saturday.

Step-by-step explanation:

first, add to get the total amount of people

150 + 350 = 500

now that we have the total, divide the people that did not buy popcorn by the total amount of people

350/500 = 0.7

then, multiply that by 100

0.7 x 100 = 70

your final answer would be 70%

7 0
3 years ago
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