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

Answers

Answer 1

Answer:

The formula is ¹⁵C₇. Then the number of ways to choose a group of 7 from a group of 15 will be 6435.

What are permutation and combination?

A permutation is an act of putting things or elements in the right sequence. Combinations are a method of picking things or pieces from a collection of objects or sets when the sequence of the objects is irrelevant.

Then the number of ways to choose a group of 7 from a group of 15 will be given by the combination formula.

Then we have

Number of ways = ¹⁵C₇

Number of ways = 6435

More about the permutation and the combination link is given below.

brainly.com/question/11732255

#SPJ2

Answer 2

Answer: You didn't supply any expressions, but it'd be one of these (assuming it's unique combinations, rather than the duplicate permitting permutations):
(15!)/(7!(15-7)!)
or
(15!)/(7!8!)
or
(15•14•13•12•11•10•9)/(7!)
or
(15•14•13•12•11•10•9)/(7•6•5•4•3•2)
or
32432400/5040
or
6435

depending on what it has as possible answers.

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jane walked 4/5 mile on monday on tesday she wwalked 1//2 of the distance she walked on monday how many miles she walked on tuesday a 3/4 mile b 2/5 mile c 1/5 mile d 1/2 mile

Answers

4/5 on mon
tue=1/2 of mon (4/5)

so 1/2 of 4/5
'of' can be translated to multiply with fractions
1/2 times 4/5=(1 times 4)/(2 times 5)=4/10=2/5

the naswer is 2/5 mile or b

I got B
i turned them into decimals
4/5 is 0.8
1/2 is 0.5
0.8*0.5=0.4
0.4=2/5

Jasmine sold 30 bracelets on Monday and 15 bracelets a day for the next few days. She sold a total of 105 bracelets. Write an equation that can be solved to determine the number of additional days, d, she sold bracelets

Answers

Answer:

30 + 15d = 105, I think

Step-by-step explanation:

What is the first step in writing f(x) = 3x2 + 6x – 8 in vertex form?A.Factor out 3 from each term.
B.Form a perfect square trinomial by keeping the value of the C.function equivalent.
D.Write the trinomial as a binomial squared.
E.Factor out 3 from the first two terms.

Answers

The first step in writing f(x) = 3x² + 6x - 8 in vertex form is

E. Factor out 3 from the first two terms.

f(x) = 3x² + 6x - 8
f(x) = 3(x² + 2x) - 8
f(x) + 8 = 3(x² + 2x + __)
f(x) + 8 + 1 = 3(x² + 2x + 1)
f(x) + 9 = 3(x+1)²
f(x) = 3(x+1)² - 9

Answer:

Factor out 3 from the first two terms.

Step-by-step explanation:

I need help with math!!! time is running out!!! will mark brainliest!!!PLEASE TAKE A LOOK AT ALL PHOTOS, TO ANSWER QUESTION PROPERLY. THE FIRST PHOTO IS QUESTION OTHERS ARE ANSWER CHOICES.

Answers

Correct answer is B. (graph in the first quadrant).

Simplify the expression. -14 x 8 x 1/4 + (-22) a. –50
b. –138
c. –470
d. –6

Answers

-14 x 8 x 1/4 + (-22)

Apply BODMAS

Open the brackets:
-14 x 8 x 1/4 + (-22) = -14 x 8 x 1/4 -22

Division
-14 x 8 x (1/4) - 22 = -14 x 8 x 0.25 - 22

Multiplication
(-14 x 8 x 0.25 )- 22 = -28 - 22

Subtraction
-28-22 = -50

Correct answer: A <-50>

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B. a profit of $5
C. a loss of $5
D. an overdraft of $5

Answers

the answer is B. a profit of $5

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