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3 years ago

wright down in terms of n, an expression for the nth term of the following sequences: a) 12,10,8,6,4 b) 25,20,15,10,5

Mathematics

1 answer:

Arturiano [62]3 years ago

3 0

Answer:

a) $a_{n}$ =−2n+14

b) $a_{n}$ = − 5 n + 30

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A 3

Andrew [12]

Answer:

There are (63) combinations. The notation means "six choose three". Out of six items (flavors) choose three.

(nk)=n!k!(n−k)!.

(63)=6!3!3!.

Think of it this way. There are 6 ways to choose a flavor. Once you choose, there are 5 ways to choose the next. After that, there are 4 flavors left. which is 6!/3!=6⋅5⋅4⋅3⋅2⋅13⋅2⋅1=6⋅5⋅4=120.

But, you could have chosen {chocolate,vanilla,strawberry} and you get the same combination as {vanilla, strawberry, chocolate} so we have to divide by 3!=3⋅2⋅1=6 to account for the order of choosing.

So the number of combinations of flavors is (63)=1206=20.

<h3>Mark me a brainlist</h3>

7 0

2 years ago

The value of y varies directly with x. When y=55, x=1/4. Determine the constant of proportionality

docker41 [41]

Answer:

k = 220

Step-by-step explanation:

Proportion of y and x

y = kx

Given :

y = 55
x = 1/4

Solving :

55 = k/4
k = 55 x 4
k = 220

4 0

2 years ago

Please help I cannot-

Dmitry [639]

Answer:

1922 m cubed

Step-by-step explanation:

Not gonna do that, I did the work and checked it. Should be right

5 0

3 years ago

Read 2 more answers

Lester wanted to make a batch of trial mix for the weekend.The recipe make 6 servings and contains 3 cups of cereal how much cer

Natalija [7]

Answer:

1/2 cup of cereal per serving

Step-by-step explanation:

3 cups of cereal, 6 total servings

3/6 can be reduced to 1/2 cup per serving

4 0

3 years ago

Which of the following is a trinomial with a constant term ?

Katarina [22]

It’s A because a trinomios has three terms and the last digit 12 doesn’t change unlike 2y which changes with every input of y.

5 0

3 years ago