MATHEMATICS HIGH SCHOOL

What is the product of (x + 3)(2x – 1)

Answers

Answer 1

Answer:

Answer:

The product of $(x + 3)(2x -1)=2x^2+5x-3$

Step-by-step explanation:

Given : Two expressions (x + 3) and (2x – 1)

We have to find the product of given expression that is $(x + 3)(2x -1)$

Consider the given expression $(x + 3)(2x -1)$

Multiply each term of first bracket with each term of second bracket

$\left(a+b\right)\left(c+d\right)=ac+ad+bc+bd$

we have,

$=x\cdot \:2x+x\left(-1\right)+3\cdot \:2x+3\left(-1\right)$

Simplify, $-(-a)=+a$

we have $=2xx-1\cdot \:x+3\cdot \:2x-3\cdot \:1$

Simplify, we get,

$=2x^2-x+6x-3$

Adding like terms, we have,

$=2x^2+5x-3$

Thus, the product of $(x + 3)(2x -1)=2x^2+5x-3$

Answer 2

Answer: Umm
(X+3)(2x-1)
=2x square -x + 6x - 3
=2x square +5x -3

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The mean and standard deviation of a population being sampled are 64 and 6, respectively. If the sample size is 50, what is the standard error of the mean? how do I find the standard error?

Answers

SEM - Standard error of the mean;
You can find the standard error with a formula:
SEM = s / √n, where s is the standard deviation and n is the sample size;
SEM = 6 / √50 = 6 / 7.071
Answer:
SEM = 0.8485

Final answer:

The standard error is calculated as the standard deviation divided by the square root of the sample size. For a population with a standard deviation of 6 and a sample size of 50, the standard error is 6 / sqrt(50).

Explanation:

The standard error can be defined as the standard deviation divided by the square root of the number of samples. It helps to estimate the variability in the population. In this case, the mean is 64, the standard deviation is 6, and the sample size is 50. The equation to calculate the standard error is:

$Standard Error = Standard Deviation / \sqrt(Sample Size).$

Plugging in the values given in the question, we get:

$Standard Error = 6 / \sqrt(50)$

. After performing the division, you will get the standard error of the mean which tells you how far your sample mean could be from the true population mean.

Learn more about Standard Error here:

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True or false:a parallelogram has 4sides and exactly 2 pairs of parallel sides

Answers

True. I don't think there's a more elaborate way to answer that... the evidence is all there.

True. A parallelogram has 4 sides and 2 pairs of parallel lines.

James works as a waiter.Bills where $23.59,$40.65,$30.50 And $15.68His total tips was $17.67. What percent tip did he recieve for serving these meals. Round to nearest percent.

Answers

The percentage of the tip is 16%. This is computed by summing up all the bills, 23.59 + 40.65 + 30.50 + 15.68, which is equal to $110.42. Then $17.67 will be divided by $110.42, which is equal to 0.16000. After than to get the percentage we have to divide the 0.1600 by 100, which is equal to 16%.

How many terms are in the expression: 12p + 8m + 2

Answers

Answer: I THINK 4.

Step-by-step explanation:

Sorry if it is wrong!! :'D

A and B share money in a ratio of 9:4. How much of the £39000 does B get?

Answers

so we have a total of 39000
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I was going to answer your question but someone did it

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