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Tju [1.3M]
2 years ago
3

Write an explicit formula for the nth term of the sequence 16, 7, -2

Mathematics
1 answer:
geniusboy [140]2 years ago
3 0

Answer:

Formula for nth term is 25 - 9n.

Step-by-step explanation:

common difference (d)= -9

a = 16

Now,

an = a + d(n - 1)

an = 16 + -9(n - 1)

or, an = 16 - 9n + 9

Hence an = 25 - 9n.

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What is the approximate circumference of a circle that has a diameter of 25 yards?
Sedaia [141]
Circumference = 2\pir
r = 12.5
2 * \pi * 12.5 ~ 78.540
The answer is about 78.540
8 0
4 years ago
Factor Quadratics
lawyer [7]

Answer:

Let's factor x2+3x−18

x2+3x−18

The middle number is 3 and the last number is -18.

Factoring means we want something like

(x+_)(x+_)

Which numbers go in the blanks?

We need two numbers that...

Add together to get 3

Multiply together to get -18

Can you think of the two numbers?

Try -3 and 6:

-3+6 = 3

-3*6 = -18

Fill in the blanks in

(x+_)(x+_)

with -3 and 6 to get...

(x-3)(x+6)

Answer:

(x−3)(x+6)

Step-by-step explanation:

3 0
3 years ago
Find some means. Suppose that X is a random variable with mean 30 and standard deviation 4. Also suppose that Y is a random vari
mr_godi [17]

COMPLETE QUESTION:

Find some means. Suppose that X is a random variable with mean 30 and standard deviation 4. Also suppose that Y is a random variable with mean 50 and standard deviation 8. Find the mean of the random variable Z for each of the following cases. Be sure to show your work.

a) Z = 35-10X

b) Z = 12X-5

c) Z = X+Y

d) Z = X-Y

e) Z = 2X+2Y

Answer:

a) -265

b) 355

c) 80

d) -20

e) 40

Step-by-step explanation:

The attachment below contains the whole calculations that provides for the answers above

6 0
3 years ago
Write the equation 2y − 4x = 5 in the form y = mx + b.
gtnhenbr [62]

Hello from MrBillDoesMath!

Answer:

y = 2x + 2.5

Discussion:

2y -4x = 5                        => add 4x to both sides

2y - 4x + 4x = 4x + 5        => -4x + 4x = 0

2y = 4x + 5                      => divide both sides by 2

y = 2x + (5/2)                   => as 5/2 = 2.5

y = 2x + 2/5

Thank you,

MrB

3 0
4 years ago
Please explain the steps on how to solve -1-3[4^2-3(-6)] ? The answer is -103
masya89 [10]
-1-3[16+18]
-1-3[34]
-1-102
-103

6 0
3 years ago
Read 2 more answers
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