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2 years ago

How do I get the recursive and explicit formulas of this: ..., -3, -18, -108, ...

Mathematics

1 answer:

PtichkaEL [24]2 years ago

8 0

Answer: multiply by 6

Step-by-step explanation:

3×6=18

18×6=108

108×6=648

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The scores for a certain test of intelligence are normally distributed with mean 85 and standard deviation 11. Find the 90th per

jonny [76]

Answer:

99.1 is the 90th percentile of these scores.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 85

Standard Deviation, σ = 11

We are given that the distribution of score is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find the value of x such that the probability is 0.90

$P( X < x) = P( z < \displaystyle\frac{x - 85}{11})=0.90$

Calculation the value from standard normal z table, we have,

$P(z \leq 1.282) = 0.90$

Putting values, we get,

$\displaystyle\frac{x - 85}{11} = 1.282\\\\x = 99.1$

Thus, 99.1 is the 90th percentile of these scores.

5 0

3 years ago

Someone help me please

Alika [10]

Answer:

x = 58°

Step-by-step explanation:

The sum of the angles in Δ AHI = 180 , then

∠ AIH = 180° - (66 + 56)° = 180° - 122° = 58°

x and ∠ AIH are corresponding and are congruent , then

x = 58°

7 0

3 years ago

John, and bill shared $900 in the ratio 7:3 respectively. how much money did each person get?

S_A_V [24]

John get money $630 and bill get money $270.

Given that John and bill shared $900 in the ratio 7:3 respectively.

The ratio is defined as the comparison of two quantities of equal units, indicating the quantity of one quantity contained in the other quantity.

The total ratio is 7+3=10

For john:

John has money seven out of 10 for the $900, we get

J=900×(7/10)

J=90×7

J=630

For bill:

Bill is three out of ten for $900, we get

B=900×(3/10)

B=90×3

B=270

Hence, john get money $630 and bill get $270 when they both shared $900 in the ratio 7:3 respectively.

Learn more about ratio from here brainly.com/question/2914376

#SPJ4

6 0

1 year ago

Answer for this one

REY [17]

Answer:

Step-by-step explanation:

The pH of solution a decreases, as the pH of solution B decreases as well.

7 0

2 years ago

Evaluate. -|-7 + 3| You

jeka57 [31]

Answer:

Step-by-step explanation:

calculate the sum of -7 + 3

-|-4|

the absolute value of any number is always positive

 -4 

 (the negative sign outside the absolute value signs is kept)

8 0

3 years ago

Read 2 more answers

How do I get the recursive and explicit formulas of this: ..., -3, -18, -108, ...​

How do I get the recursive and explicit formulas of this: ..., -3, -18, -108, ...