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3 years ago

14

Can someone help me w this question plz.

1 answer:

quester [9]3 years ago

6 0

For any solution it follows that y=y so:

x^2+2x=3x+20 subtract 3x from both sides

x^2-x=20 subtract 20 from both sides

x^2-x-20=0 factor...

x^2-5x+4x-20=0

x(x-5)+4(x-5)=0

(x+4)(x-5)=0

x=-4 and 5 now to find the corresponding y values I'll use y=x^2+2x

y(-4)=16-8=8 and y(5)=25+10=35 so the two solutions are the points:

(-4, 8) and (5, 35)

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pshichka [43]

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3 years ago

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Events A and B have probabilities such that P(A) = 0.3, P(B) = 0.25, P(M ∪ N) = 0.425, and P(M ∩ N) = 0.075. Are events A and ev

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<u>The correct option is C.</u>

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3 years ago

Assume that y varies directly as x then solve. If x = 12 <br> when y = 15 find x when y = 21.

Viefleur [7K]

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2 years ago

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Answer:

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2 years ago