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Nitella [24]
3 years ago
5

Mrs. Woltjer teaches a science class with 34 students. Mrs. Woltjer divides the class into 2 equal-sized groups alphabetically b

y last name to work on final presentations. What is the likelihood that Aaron Bennings and Keiko Yoshino will be in the same group?
Mathematics
1 answer:
vladimir1956 [14]3 years ago
3 0

Step-by-step explanation:

34/2 is 17

the likelyhood is 1/2 but it won't happend because Aaron's last name starts with a B and Keiko's last name start with Y

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Will give brainliest, please help fast​
Gekata [30.6K]

Answer:

Converting the equation x^2-20x+13=0 into completing the square method we get: \mathbf{(x-10)^2=87}

Step-by-step explanation:

we are given quadratic equation: x^2-20x+13=0

And we need to convert it into completing the square method.

Completing the square method is of form: a^2-2ab+b^2=(a-b)^2

Looking at the given equation x^2-20x+13=0

We have a = x

then we have middle term 20x that can be written in form of 2ab So, we have a=x and b=? Multiplying 10 with 2 we get 20 so, we can say that b = 20

So, 20x in form of 2ab can be written as:  2(x)(10)

So, we need to add and subtract (10)^2 on both sides

x^2-20x+13=0\\x^2-2(x)(10)+(10)^2-(10)^2+13=0\\(x^2-2(x)(10)+(10)^2) \:can\: be\: written\: as\: (x-10)^2 \\(x-10)^2-100+13=0\\(x-10)^2-87=0\\(x-10)^2=87

So, converting the equation x^2-20x+13=0 into completing the square method we get: \mathbf{(x-10)^2=87}

4 0
2 years ago
Tanya's rotation maps point K(24, –15) to K'(–15, –24). Which describes the rotation? 90 degrees clockwise rotation 270 degrees
alexira [117]

Answer:

A. 90 degrees clockwise rotation

Step-by-step explanation:

Of we have a coordinate axis (x,y), if this axis is rotated 90° clock wide, the resulting coordinate of the pre-image will be the coordinate (y -x). Note that the coordinates was swapped and then the new y coordinate negated.

Given the coordinate K(24, -15). If we rotate this clockwisely, first we swap the coordinate axis to have (-15, 24)

Them we will negate the new y coordinate axis to have;

K'(-15, -24)

Therefore the correct answer is 90° clockwise rotation.

7 0
2 years ago
Read 2 more answers
Need help ASAP thks
babunello [35]

Answer: D

Step-by-step explanation:

3 0
3 years ago
PLEASE HELPPP I TOLD MY MOM I WOULD BE DONW ITH THIS CLASS TODAY SO SHE WOULDNT YELL AT ME BUT I HAVE 54 ASSIGNMENTS
Scrat [10]
(x^2+1)(x+2)(x −2)

*ps the ^ means it’s a exponent

Hope I helped <3 sorry if I was wrong :(
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2 years ago
Can someone please Compare and contrast a line graph to a pie graph and the first one to submit an answer gets brainiest
lara31 [8.8K]

Line graphs can be used to compare changes over the same period of time for more than one group. Pie charts are best to use when you are trying to compare parts of a whole. They do not show changes over time.

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