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STatiana [176]
3 years ago
7

Can someone please help me with this?

Mathematics
1 answer:
Tomtit [17]3 years ago
8 0

Obviously, Ali is correct. Khamis did a mistake, he forgot the negative sign of  - 5, when he divided b. He should have let - 5b and divided it by - 5 like ali did.

Good Luck

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Max points!! help please!!! tyyyyy
krek1111 [17]

Answer:

b.  70

Step-by-step explanation:

The Binomial Coefficient can be used to calculate the number of ways objects can be arranged.  

<u>Binomial Coefficient</u>

\displaystyle \rm \binom{n}{r} \: = \:^{n}C_{r} = \frac{n!}{r!(n-r)!}

The exclamation mark "!" placed after a number means factorial and indicates to multiply all whole numbers from the given number down to 1.

Example:  4! = 4 × 3 × 2 × 1

The Binomial Coefficient gives us the number of ways of picking "r" unordered outcomes from "n" possibilities.

As there are 8 friends  ⇒  n = 8.

As each car takes 4 friends  ⇒  r = 4.

Substitute these values into the formula:

\begin{aligned} \implies \displaystyle \rm \binom{8}{4} \: = \:^{8}C_{4} & = \rm \frac{8!}{4!(8-4)!}\\\\ & = \rm \dfrac{8 \times 7\times 6\times 5\times 4\times 3\times 2\times 1}{4\times 3\times 2\times 1\times 4\times 3\times 2\times 1}\\\\ & = \rm \dfrac{8 \times 7\times 6\times 5}{4\times 3\times 2\times 1}\\\\ & = \rm \dfrac{1680}{24}\\\\ & = \rm 70\end{aligned}

Learn more about the binomial coefficient here:

brainly.com/question/27802390

brainly.com/question/27800539

6 0
2 years ago
Read 2 more answers
What is the sum of the finite arithmetic series? (–5) + 0 + 5 + 10 + ... + 65 A. 900 B. 455 C. 450 D. 445
Julli [10]

Answer:

The answer is C.450

.

4 0
3 years ago
Marie can find the volume of a cube by using the formula V = s³, where s represents the side length of the cube. If Marie’s cube
monitta

Answer:

the anwser is 3/2

Step-by-step explanation:

you have to do 2 1/2 times 3 then have to put it in fraction form and it is 3/2

Hope i explained it well its my first time vote me brainleist and tell me if i got it right

6 0
3 years ago
Given 4x − 8y = 8:
siniylev [52]
4x - 8y = 8
8y = 4x - 8
y = 1/2 x - 1

slope: 1/2
y-intercept:(0, -1)

Line perpendicular- negative reciprocal slope

y-(-1) = -2 (x-0) Hahaha I don't know what is the point slope form though hahaha not sure with this.
3 0
3 years ago
The grocery store sells 4 pints of strawberries for 13.80 how much does it cost per pint<br><br>​
Mashcka [7]

Answer:

3.45

Step-by-step explanation:

if 4 pints are 13.80 you would have to divided 13.80 by 4 and 4 by 4 to get 1 over blank. The denominator would be 3.45 which would be the amount 1 pint cost. If you don't want to do it as fractions you can simply divide 13.80 by 4.

5 0
3 years ago
Read 2 more answers
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