Can anyone help me with 3 algebra problems please?

Question

anonymous · Answer

Sure

savannah_noelle · Answer

thank you :)

anonymous · Answer

woah sorry i thought that was algebra 2 sry can't help but @thomaster can

savannah_noelle · Answer

Awwuh okay, well thanks for trying :)

anonymous · Answer

ur welcome good luck

texaschic101 · Answer

y = -3x + 8....the slope of this line is -3. However, we need a perpendicular line, so we need the negative reciprocal of that slope. All that means is " flip " the slope and change the sign.
slope -3, or -3/1....flip it and change the sign, making it 1/3.

y = mx + b
slope(m) = 1/3
(3,4)  x = 3 and y = 4
now sub
4 = 1/3(3) + b
4 = 1 + b
4 - 1 = b
3 = b

your perpendicular line is : y = 1/3x + 3

Now if you were looking for a parallel line, the slope would stay the same as in the original equation...it would be 3.

texaschic101 · Answer

oops...if it were parallel, the slope would stay the same and be -3

texaschic101 · Answer

any questions ?

savannah_noelle · Answer

Every time they ask for the perpendicular line that just means to use the reciprocal?

texaschic101 · Answer

use the negative reciprocal....flip the slope and change the sign..

slope -4.....negative reciprocal is 1/4
slope 4/3....negative reciprocal is -3/4
slope -1/5...negative reciprocal is 5

understand ?

texaschic101 · Answer

do not forget to change the sign...it makes a difference

texaschic101 · Answer

you got more ?

savannah_noelle · Answer

yes I do, I tried to do this myself with the way you taught me above but it says its wrong

savannah_noelle · Answer

attachment

texaschic101 · Answer

y = 4x - 1....a parallel line will have the same slope. Do you know the slope of this equation ?

anonymous · Answer

Two fair dice are rolled, and the product of the two numbers is recorded. Which of the following best describes the theoretical probability distribution?

savannah_noelle · Answer

The slope is 4 @texaschic101

texaschic101 · Answer

y = mx + b
slope(m) = 4
(2,0) x = 2 and y = 0
now sub
0 = 4(2) + b
0 = 8 + b
-8 = b

equation is : y = 4x - 8

savannah_noelle · Answer

Thank you, I was putting y=4x-4 which is why I got it wrong :/ there's one more

savannah_noelle · Answer

attachment

savannah_noelle · Answer

@taffalousswagg_bru

texaschic101 · Answer

what you have is a horizontal line. A horizontal line is written as y = ......
so the equation for this one is y = 1......y is never going to be different.

savannah_noelle · Answer

@texaschic101 Thank you! :)

texaschic101 · Answer

glad to help :)

anonymous · Answer

hold on im working the problem out