A need someone to check this and if it is wrong can you help me!! And on 45 as well.http://oi42.tinypic.com/fmuh60.jpg

Question

rajee_sam · Answer

you got no. 44 right. So no. 45 just similar to that

nerdy_3000 · Answer

Thanks!

jim_thompson5910 · Answer

see attached for what you got right/wrong

rajee_sam · Answer

why is 44 wrong?

jim_thompson5910 · Answer

for #45, you need to solve the following for x

$$\large 12^2 + x^2 = (12+8)^2$$

rajee_sam · Answer

@jim_thompson5910 , Why is her 44 wrong?

jim_thompson5910 · Answer

because $$\large \sqrt{200} \approx 14.142135623731 \approx 14.1$$

and NOT 14.2

rajee_sam · Answer

oh come on!!

rajee_sam · Answer

her method is absolutely right

jim_thompson5910 · Answer

well the teacher will mark it wrong, so just letting the person know

rajee_sam · Answer

1/100th of a point doesn't matter

jim_thompson5910 · Answer

yes the steps are valid, just that last part is off

jim_thompson5910 · Answer

well I'm just telling you what a teacher would do

jim_thompson5910 · Answer

and what a computer grader would do, ideally you would have partial credit, but it's the answer that counts (most of the time)

rajee_sam · Answer

@Nerdy_3000  For No. 40 she found the slope just right. But the equation of the line may not have the same y-intercept. Also the question asks for only the slope. So word of caution, do not write unnecessary information and get the whole thing wrong.

rajee_sam · Answer

@Nerdy_3000 , For No. 42, one line equation you wrote in y=mx + b form. Why did you not do the same for the second one? So focus and do what the right thing is.

nerdy_3000 · Answer

Well I'm rounding to the nearest tenth

jim_thompson5910 · Answer

yes, 14.142135623731 to the nearest tenth would be 14.1 and not 14.2

nerdy_3000 · Answer

I didn't see it correctly thanks

jim_thompson5910 · Answer

np

nerdy_3000 · Answer

By the way for 45 can you show me what I had to do for that??

jim_thompson5910 · Answer

you need to solve 

$$\large 12^2 + x^2 = (12+8)^2$$
for x

jim_thompson5910 · Answer

$$\large 12^2 + x^2 = (12+8)^2$$

$$\large 12^2 + x^2 = 20^2$$

$$\large 144 + x^2 = 400$$

I'll let you finish

nerdy_3000 · Answer

Alright you perform Pythagorean Theorem then subtract by144 on the both sides and you get 256 then you find the square root which is 16

jim_thompson5910 · Answer

good, x = 16, you got it

nerdy_3000 · Answer

😆 Yay!!! Thanks for the help

jim_thompson5910 · Answer

np