3 years ago

1.

Mathematics

1 answer:

Gnom [1K]3 years ago

5 0

The answer would be B.

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PLEASE HELP!!! I NEED THE ANSWER SOON :)

densk [106]

$y=2x \newline y= x^{2} -3$

Substitue 2x for y in the second equation:

$2x= x^{2} -3$

Rearrange to $a x^{2} +bx+c=0$ form:

$x^{2} -2x-3=0$

Factor:

$(x-3)(x+1)=0$

Zeros are $x=3$ and $x=-1$

To find y-coordinates of pts of intersection, plug these x-values into first equation to get $y=-2$ and $y=6$

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3 years ago

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Aneli [31]

Answer:

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Who else uses time4learning? am i the only one?

Greeley [361]

Answer:

i think i used it before

Step-by-step explanation:

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Students in a middle school must choose to take either Band or Chorus. In a given academic year, 60% of the pupils choose Band a

grigory [225]

Pupils that chose Band: 60%
Pupils that chose Chorus: 40%
Boys in band: 70%
Boys in chorus: 30%
Probability of choosing boy = Probability of boy in band + Probability of boy in chorus
P = 0.6 x 0.7 + 0.4 x 0.3
P = 0.54
The answer is D.

3 0

3 years ago

Look at the proof. Name the postulate you would use to prove the two triangles are congruent.

vovikov84 [41]

Answer:

Option A, SSS Postulate

Step-by-step explanation:

<em>Since it gives you three sides, that means that it is a SSS.</em>

There are no angles given which eliminates 2 options.

Answer: Option A, SSS Postulate

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3 years ago