(7x4 + 2x3 - 3) – (4x2 - 9x + 2)

Mathematics

1 answer:

abruzzese [7]3 years ago

4 0

Answer:

7x4+2x3-4x2-5

Step-by-step explanation:

We will start solving this question by opening the bracket first

So let's solve

(7x4+2x3-3)-(4x2-9x+2)

7x4+2x3-3-4x2+9x-2

Collect like terms

7x4+2x3-4x2-3-2

7x4+2x3-4x2-5

So the final answer is 7x4+2x3-4x2-5

You might be interested in

Candita uses 1 of an ounce of green paint each time she draws a green line on her painting. She draws a total of 7 green

omeli [17]

(1 + 1 + 1 + 1 + 1 + 1 + 1 ) and ( $\frac{1}{2} + \frac{1}{2} + \frac{1}{2} +\frac{2}{2}$ ) represents the amount of green paint that Candita used drawing green lines on the painting.

6 0

3 years ago

The table below shows the scores of a group of students on a 10-point quiz.Test ScoreFrequency3 54 15 16 27 28 49 310 1The mean

Katarina [22]

Explanation

Part A

We can use the formula below to find the mean.

$\text{Mean}=\sum ^{}_{}(\frac{fx}{f})$

We will then have;

$\begin{gathered} \text{Mean = }\frac{5\times3+4\times1+5\times1+6\times2+7\times2+8\times4+9\times3+10\times1}{19}=\frac{15+4+5+12+14+32+27+10}{19} \\ =\frac{119}{19}=6.2632 \end{gathered}$

Mean = 6.2632

Part B

Since the data set is odd.

$\begin{gathered} \text{Median}=\frac{(n+1)}{2}^{th}\text{observation} \\ =\text{Value of }\frac{\text{(19+1)}}{2}^{th}\text{observation} \\ =\text{value of 10th observation} \end{gathered}$

Answer: From the column of cumulative frequency cf, the median is 7

5 0

1 year ago

Find the possibility of rolling even numbers three times, using a six-side die number from 1 to 6

seraphim [82]

Answer:

$\frac{1}{8}$