Question

See image [ http://prntscr.com/4mx9cc ]

Take 240,000 and multiply it by .6, correct?

This can be found at http://www.4tests.com/ - this are merely practice questions to help me prepare for my final exam.

Answer 1

Not .6, it would be 0.4, right?

Answer 2

yes

Answer 3

Yes, these are going to be very easy ,but I'm taking an exam that is going to asses from pre-k to my second year of college, so even if it's easy and seemingly simple, I want to be 100% positive.

This one: http://prntscr.com/4mxbgu

Si?

Answer 4

correct

Answer 5

yes

Answer 6

What is the slope of the line passing through points A (5,4) and B(0,3)?
Blank Image
1 / 10
1 / 5
3 / 5
4 / 5
5

y2 - y1/x2 - x1

3 - 4/0 - 5
= 1/5

Right?

Answer 7

is 0-5 equal to 5, though?

Answer 8

Right. I had 3 - 4/0-5

So I know it will be -1/5 But that's not an option, so I just went with 1/5

Answer 9

Oh, well then. Okay. -1/-5 = 1/5

Answer 10

okay, weird.

Answer 11

-/- = +

Answer 12

yes, lol

Answer 13

1 kilometer =
10 meters
100 meters
1,000 centimeters
10,000 centimeters
1,000,000 millimeters

Okay, I know it can't be 10 meters, and a kilometer is a little bit over a mile... hmm.... 100 meters?

Answer 14

so kilo means 1000
so a kilometer is 1000 meters

Answer 15

Oh, alright, then deci = 10, yes?

So what are centi and mili?

Answer 16

centi is 100
so 100 centimeters in a meter
and milli is 1000 millimeters in a meter

Answer 17

So 100 centi in 1 meters
1,000 mili in one meter

If I say: 1,000 x 100 = 100,000 centi
Then 1,000 x 1,000 = 1,000,000 milimeters

So, D

Answer 18

yep

Answer 19

Which of the following pairs of points both lie on the line whose equation is 3x-y= 2?
Blank Image
(3,-2) and (1,5)
(2,4) and (3,7)
(2,4) and (1,5)
(2,-2) and (1,5)
(3,7) and (3,-2)

Okay, I know the visual way to do this, but is there a more mathematical approach?

Answer 20

you can just plug the points in...and see if it equals 2

Answer 21

Okay, so how would you do that?

Answer 22

i would plug the points in and see which ones make the equation true

Answer 23

So both sets should equal 2?

Answer 24

so for (2,4)
x=2, y=4
3x-y
is 6-4
which is 2

so that point lies on the line
then (3,7)
3*3-7
9-7
is 2
so that one also works
so that's the answer

Answer 25

the equation is 3x-y=2
so the right hand side obviously has to be 2
so you need to find a point that makes 3x-y=2
so that 2=2
otherwise it's a false statement

Answer 26

Ah! Yes, I understand now. Hmm. I've always solved these by drawing out the graph and plotting them. It's a bit out of the way now that I think of it.

Answer 27

Yeah, that way works as well, this way is just a bit faster.

Answer 28

If 3x - 1 = 11, what is the value of x2 + x?
Blank Image
12
15
16
18
20

Okay, so I don't really understand this one.

Answer 29

x^2?

Answer 30

x^2 + 2

Answer 31

So first, we solve for x. Can you do that?

Answer 32

so in 3x-1=11
do you know how to solve for x?

Answer 33

3x = 12
x = 12/3
Okay.

Answer 34

so what's 12/3?

Answer 35

12 divided by 3

Answer 36

4

Answer 37

Right, I understand how to solve it. :^)