Solve the system. 300x-y=130 200x+y=120 a. (1,170) b. (0.5,20) c. (1.5,150) d. (2,300)

i think the answer is B my apologies if i'm wrong

The correct option is B

Step-by-step explanation:

First step we should build an equation´s system with the two equations

300x-y=130

200x+y=120

Now we clear "y" from one of the equations, i choose the first one

y= 300x-130, and replace it in the second one

200x + (300x-130)=120 ⇒ 200x+300x-130=120

500x=120+130 ⇒ 500x=250 ⇒ x=

x=0.5

Final step we replace that value in some of the equations

y= 300*(0.5) - 130

y= 150-130 ⇒ y=20

So in conclusion we have found the point (0.5,20)

see below

step-by-step explanation:

7.   there are 10 data points in the set.   the middle point is between 5 and 6.   the middle point in the top half is 8   and the middle point in the bottom half is 3. to find the iqr , take point 8 and subtract point 3

mid term   point 8 = 100   point 3 = 88

iqr = 100-88 = 12

final   point 8 = 93   point 3 = 78

iqr = 93 - 78 = 15

the final has the greatest iqr

6.   b - there is a high data value that causes the data set to be asymmetrical for the males: the data for males are high and asymmetrical .   there is an outlier for the males that skews the data

5.   the   iqr is a better measure of spread for the movies and basketball games.   since the basketball game has an outlier, we do not want to use standard deviation for measurement.  

3.   the exam median is much higher than the class median.   the median line is farther to the right on the exams

2.   there is no way to tell what the means are from the box and whisker plots.