Question

If X = 5 and Y = 3, what does Z equal?
2X + 2Z = 10Y

10
20
40
3
1/3
@satellite73 i need help

Answer 1

\[2x+2a=10y\]?

Answer 2

\[2\times 5+2\times Z=10\times 3\] if i am reading this correctly

Answer 3

that means
\[10+2Z=30\]
solve for Z
this is way easier then the previous questions, so maybe i am reading it wrong

Answer 4

\[2Z=20\\Z=10\]is my answer

Answer 5

oh yeahh lol i got the same thing i thought it was gonna be way harder than this

Answer 6

how did we go from translating functions to this easy algebra?

Answer 7

i just started taking this course lol so the beginning is very easy and throughout the whole thing it will get harder than ever :P

Answer 8

What would be the value of angle a in the diagram found below of two parallel lines?


40 degrees
90 degrees
60 degrees
120 degrees
cannot be determined

Answer 9

would i be 40 degrees as well? @satellite73

Answer 10

no

Answer 11

the internal angles add up to 180, you have a right angle at 90 and another angle of 40 leaving \[180-90-40=5\]

Answer 12

ooops
\[180-90-40=50\]

Answer 13

its not in the answer choices.

Answer 14

oooh i should pay attention
it want the angle A, not the other angle of the triangle
you are right, it is also 40
sorry

Answer 15

lol okayy! thanks

Answer 16

yw

Answer 17

What is the value of the radius of the following circle with an area of 154 cm^2?


4.9 cm
7.0 cm
25 cm
68 cm

Answer 18

\[A=\pi r^2\]
\[154=\pi r^2\\
\frac{154}{\pi}=r^2\\
\sqrt{\frac{154}{\pi}}=r\]

Answer 19

the answer is A?

Answer 20

i get 7
http://www.wolframalpha.com/input/?i=sqrt%28154%2Fpi%29

Answer 21

no i think it is B, 7

Answer 22

oh yeahh hahah i forgot to square root oops lol :P

Answer 23

Find the mean and median of the following data set.98, 87, 92, 79, 65, 91, 80, 92, 85, 86.

Mean: 76.9, Median: 65
Mean: 84.5, Median: 78
Mean: 85.5, Median: 86.5
Mean: 85.5, Median: 86

Answer 24

wow talk about donkey work for wolfram

Answer 25

http://www.wolframalpha.com/input/?i=mean+98%2C+87%2C+92%2C+79%2C+65%2C+91%2C+80%2C+92%2C+85%2C+86

Answer 26

looks like mean is \(85.5\) now lets find the median

Answer 27

http://www.wolframalpha.com/input/?i=median+98%2C+87%2C+92%2C+79%2C+65%2C+91%2C+80%2C+92%2C+85%2C+86

Answer 28

looks like C

Answer 29

Sanjay has quiz scores of 96%, 89%, 92%, 77%, 100% and 87%. What score does he need to make on the final quiz to have an overall average of 91%?

96%
97%
98%
99%

Answer 30

i got A @satellite73

Answer 31

\[\frac{96+89+92+77+100+87+x}{7}=91\]

Answer 32

http://www.wolframalpha.com/input/?i= \frac{96%2B89%2B92%2B77%2B100%2B87%2Bx}{7}%3D91
looks like 96

Answer 33

hmmm link may not work
i get 96 so A