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3 years ago

Evaluate: 45 n=1(4n +9) = [?]

Mathematics

1 answer:

Alenkasestr [34]3 years ago

7 0

Answer: 4545

Step-by-step explanation:

Split the summation into smaller summations that fit the summation rules.

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2 years ago

Child Health and Development Studies (CHDS) has been collecting data about expectant mothers in Oakland, CA since 1959. One of t

liraira [26]

Answer:

A.) There is a 3.4% chance that a random sample of 50 expectant mothers will have a mean age of 26.5 years old or greater if the mean age for a first time mother is 26 years old.

Step-by-step explanation:

The mean age for a first time mother is assumed 26 years old (null hypothesis) and p-value of the sample mean (26.5 years ) is found as 0.034.

This is the probability of having first time mother mean age 26.5 or greater under the assumption of null hypothesis.

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2 years ago

Look below :) Everything is underneath, ty. Just need an answer by Wednesday

mamaluj [8]

Answer:

Step-by-step explanation:

$\dfrac{3}{6}=\dfrac{9}{18}=\dfrac{27}{54}$

$\dfrac{3*3}{6*3}=\dfrac{9}{18}\\\\\\\dfrac{3*9}{6*9}=\dfrac{27}{54}$

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2 years ago

Simplify the expression (2x − 9)(x + 6)

kenny6666 [7]

Answer:

Simplified form of given expression (2x – 9 )( x + 6 ) is $2 \mathrm{x}^{2}+3 \mathrm{x}-54$

Solution:

We need to simplify following expression.

(2x – 9) ( x + 6)

For sake of simplicity lets first assume 2x – 9 = A

So expression becomes A(x+6)

= Ax + A6

Now replace A by 2x – 9

= (2x – 9 ) x + (2x – 9 ) 6

$=2 \mathrm{x}^{2}-9 \mathrm{x}+12 \mathrm{x}-54$

On simplification, we get

$=2 \mathrm{x}^{2}+3 \mathrm{x}-54$

Hence simplified form of given expression (2x – 9 )( x + 6 ) is $= 2 \mathrm{x}^{2}+3 \mathrm{x}-54$

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2 years ago

Plzzzzz someone help me

solong [7]

The answer is The equation 3.5|6x – 2| = 3.5 has one solution

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2 years ago

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