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2 years ago

Which of the following expressions would give the number of ways to choose a group of 7 from a group of 15?

Mathematics

1 answer:

OLga [1]2 years ago

5 0

Answer:

Step-by-step explanation:

The number of ways to choose a combination of 7 objects from a group of 15 objects is 15! / (7! 8!)

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Cate and elena were playing cards

Delicious77 [7]

There were...
11cards left.
heres why.
they started with 24 cards....
so...
24+8=32
32-12=20
20-9=11

Hope i helped!!! :)
Mark me as brainliest if i helped XD

6 0

3 years ago

When you combine equations and both variables are eliminated and the result is a true statement, the system of equations has ___

Andrews [41]

One or a unique its the some thing

3 0

3 years ago

PLZZZ HELP will mark brainliest!

erica [24]

Answer:

(3,8): No, (-1,-11): Yes, (2,7): Yes, (0,-6): No

Step-by-step explanation:

Basically, you just substitute x and y with the numbers given.

18x - 3y = 15

y = 6x - 5

(3,8):

18(3) - 3(8) = 15

54 - 24 = 30 It is not equal to 15, so it does not work.

y = 6x - 5

8 = 6(3) - 5

8 = 13 It is not equal to 8, so it does not work.

Therefore, (3,8) is not a solution.

Try this for every pair and you will find that (-1,-11) and (2,7) are solutions.

I hope this helps!

8 0

2 years ago

Plz help with parent functions

grigory [225]

All positive numbers and zero. All positive numbers because any value that is absolute becomes positive.

7 0

3 years ago

Which choice shows the image of triangle QRS after the reflection over the x-axis followed by a rotation of 180° around the orig

Alex777 [14]

Answer:

Step-by-step explanation:

We see that triangle QRS is located in Quadrant III. (See attachment for labelling of quadrants)

Reflecting it over the x-axis means that we flip it over the x-axis, or we flip it vertically. Doing so, QRS will end up in Quadrant II.

Now, we need to rotate QRS 180 degrees about the origin. The quadrants are all 90 degrees away from each other, which means that if we rotate QRS about the origin 180 degrees, we'll end up two quadrants away from Quadrant II: we'll end in Quadrant IV.

Look at each of the answer choices. The only choice that features Q'R'S' (the image of QRS) in the fourth quadrant is the first choice, or A. So that's the answer.

<em>~ an aesthetics lover</em>

3 0

3 years ago