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3 years ago

W=3(2a+b)-4 when making a the subject

1 answer:

5 0

Answer : w/6 + 4/6 -3b/6 = a

Explanation :
First distribute it which is
=> w= 6a+3b -4
Then start moving the numbers to the left
=> w+4 - 3b = 6a
= w/6 + 4/6 -3b/6 = a

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A farmer sells 7.7 kilograms of apples and pears.3/5 of this weight is apples, and the rest is pears. How many kilograms of pear

kompoz [17]

Answer:

The weight of pears is 3.08 kg

Step-by-step explanation:

A farmer sells 7.7 kilograms of apples and pears.

3/5 of this weight is apples.

This means that the weight of apples is:

3/5 of 7.7

=> $\frac{3}{5} * 7.7 = 4.62kg$

The weight of apples is 4.62 kg.

The weight of pears will therefore be:

$7.7 - 4.62 = 3.08 kg$

The weight of pears is 3.08 kg.

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3 years ago

In which quadrant does the point (–10, 9) lie?

Furkat [3]

A. Quadrant I is the correct answer.

x axis is -10 and y axis is 9

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3 years ago

Read 2 more answers

Assume that X has a normal distribution, and find the indicated probability.

GrogVix [38]

Answer: 0.6827

Step-by-step explanation:

I believe it is 0.6827

6 0

3 years ago

The distribution of IQ scores can be modeled by a normal distribution with mean 100 and standard deviation 15.

evablogger [386]

Answer:

4.4% of the population with IQ between 120 and 125.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 100

Standard Deviation, σ = 15

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

a) Let X be a person's IQ score.

Then, density functions for IQ scores is given by:

$P(x) = \displaystyle\frac{1}{2\sqrt{2\pi}}e^{-\frac{z^2}{2}}\\\\\text{where,}\\\\z = \frac{x-\mu}{\sigma}\\\\P(x) = \displaystyle\frac{1}{2\sqrt{2\pi}}e^{-\frac{(x-\mu)^2}{2\sigma^2}}\\\\P(x) = \displaystyle\frac{1}{2\sqrt{2\pi}}e^{-\frac{(x-100)^2}{450}}$

b) P(population with IQ between 120 and 125.)

Formula:

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

$P(120 \leq x \leq 125) = P(\displaystyle\frac{120 - 100}{15} \leq z \leq \displaystyle\frac{125-100}{15}) = P(1.33 \leq z \leq 1.66)\\\\= P(z \leq 1.66) - P(z < 1.33)\\= 0.952 - 0.908 = 0.044 = 4.4\%$

$P(120 \leq x \leq 125) = 4.4\%$

6 0

3 years ago

What is the name for numbers that are greater than zero

grigory [225]

Those are positive numbers.

Those that are less than zero are called negative numbers.

Zero itself can be considered both, or neither.

3 0

3 years ago