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3 years ago

13

Select each expression that shows a correct method for finding 36% of 400.

1 answer:

kvv77 [185]3 years ago

6 0

The answer is 136 136=36% of 400

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When the sum of 5 and three times a positive number is subtracted from the square of the number, 0 results. Find the number.

Juliette [100K]

$x-the\ number\\\\x^2-(5+3x)=0\\\\x^2-5-3x=0\\\\x^2-3x-5=0$

$Use\ the\ quadratic\ formula:\\a^2x+bx+c=0\\\\\Delta=b^2-4ac\\\\if\ \Delta > 0\ then\ x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ x_2=\dfrac{-b+\sqrt\Delta}{2a}\\\\if\ \Delta=0\ then\ x_0=\dfrac{-b}{2a}\\\\if\ \Delta < 0\ then\ no\ solution$

$x^2-3x-5=0\\\\a=1;\ b=-3;\ c=-5\\\\\Delta=(-3)^2-4\cdot1\cdot(-5)+3+20=29 \ \textgreater \ 0\\\\\sqrt\Delta=\sqrt{29}\\\\x_1=\dfrac{3-\sqrt{29}}{2\cdot1}=\dfrac{3-\sqrt{29}}{2} \ \textless \ 0\\\\x_2=\dfrac{3+\sqrt{29}}{2\cdot1}=\dfrac{3+\sqrt{29}}{2} \ \textgreater \ 0$

$Answer:\ \boxed{x=\dfrac{3+\sqrt{29}}{2}}$

6 0

3 years ago

Points A and B are graphed points on the coordinate plane below. Which ordered pair is the coordinate location which is halfway

Setler [38]

Answer:

I cant see the image it doesnt seem to be loading but here is how to do the problem-->.

Add both the x coordinates and divide by 2 (this is the new x coordinate for the midpt)

next:

Add both y coordinates and divide by 2(this is the new y coordinate for the midpt)

Step-by-step explanation:

5 0

3 years ago

The upper quartile of a set of data is the mode of the upper half of the data. <br> True<br> False

Arturiano [62]

I think it might be false, I could be wrong though.
Hopefully that helped! :)

7 0

3 years ago

Read 2 more answers

Jackie bicycles 9 kilometers west to get from her house to school. After school, she bicycles 12 kilometers north to her friend

klemol [59]

Answer:

21 kilometers!

Explanation: You add the two distances she rode her bicycle and add them together. 9+12 = 21kilometers!

8 0

3 years ago

IM BEGGING SOMEONE PLEASE HELP!!!!

PtichkaEL [24]

Answer:

Option C. y ≤ x-2

y ≤ 50/9-(1/6)x-(1/18)x^2

Step-by-step explanation:

Please, see the attached files.

Thanks.

6 0

3 years ago