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Mathematics 17 Online
OpenStudy (rissyroo118):

math homework any helpers???

OpenStudy (anonymous):

any questions?

OpenStudy (rissyroo118):

Which of these ordered pairs is a solution to the inequality 3x + y > – 8? (Points : 1) (–3, 0) (–2, –1) (0, –10) (2, –16)

jimthompson5910 (jim_thompson5910):

let's check the first point (-3,0)

jimthompson5910 (jim_thompson5910):

3x + y > – 8 3(-3) + 0 > – 8 ... plug in (x,y) = (-3,0) -9 + 0 > -8 -9 > -8 ... this is false, so (-3,0) is NOT a solution

jimthompson5910 (jim_thompson5910):

So you're looking for points that make the inequality true

OpenStudy (rissyroo118):

now what about -2,-1

jimthompson5910 (jim_thompson5910):

plug in x = -2, y = -1 and tell me what you get

OpenStudy (rissyroo118):

nope a & b are incorrect!

OpenStudy (rissyroo118):

as i do them , none have came out to being right

jimthompson5910 (jim_thompson5910):

when you plug in x = -2, y = -1, what do you get on the left side?

OpenStudy (rissyroo118):

i get -7

jimthompson5910 (jim_thompson5910):

so you'll have -7 > -8 is that true or false?

jimthompson5910 (jim_thompson5910):

draw a number line if you have to

OpenStudy (rissyroo118):

that would be true

jimthompson5910 (jim_thompson5910):

so (-2,-1) is a solution

OpenStudy (rissyroo118):

yes!!! thank you

jimthompson5910 (jim_thompson5910):

you're welcome

OpenStudy (rissyroo118):

Which of these ordered pairs is a solution to the inequality y – 2x ≤ –3? (Points : 1) (2, 4) (–2, 3) (3, 4) (1, –1) could you help me with this one as well?

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