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3 years ago

Math Journal Brian says that the expressions 2(x + 2) and 3(x + 1) + 1 are

Mathematics

2 answers:

aivan3 [116]3 years ago

8 0

4(x + 2) your welcome

Salsk061 [2.6K]3 years ago

6 0

Step-by-step explanation:

if 2(0+2)=0+4=4 Answer

3(0+1)+1=(0+3)+1=4 Answer

hope it helps

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If (3a-5b) : (3a+5b)=1:4 then find the value of a:b

rodikova [14]

Answer:

a : b = 25 : 9

Step-by-step explanation:

(3a - 5b) : (3a + 5b) = 1 : 4

Product of extremes = product of means

(3a - 5b) *4 = (3a +5b) * 1 {Distributive property}

3a * 4 - 5b*4 = 3a + 5b

12a - 20b = 3a + 5b

Add 20b to both sides

12a = 3a + 5b + 20b

12a = 3a + 25b

Subtract 3a from both sides

12a - 3a = 25b

9a = 25b

$\dfrac{a}{b}=\dfrac{25}{9}$

a:b = 25 : 9

5 0

3 years ago

marusya05 [52]

Answer:

Find the attached

ii)

The mathematical model that best fits the data is;

The quadratic model

Step-by-step explanation:

A scatter-plot can easily be constructed using applications such as Ms. Excel.

In Ms. Excel, enter the data into any two adjacent columns. Next, highlight the data, then click the insert ribbon and select the scatter-plot option.

Excel returns a scatter-plot chart as shown in the attachment below.

ii)

After obtaining the scatter-plot, we shall need to add a trend line in order to determine the mathematical model that best fits the data given.

Click anywhere inside the chart, then select the design tab under chart tools. Click on the Add Chart element in the upper left corner of the excel workbook and select more trend-line options. This feature will enable us to fit any trend-line to our data.

Select any trend line option ensuring you check the boxes; Display Equation on chart and Display R-squared value on chart.

Find the attached for the various trend-lines fitted.

The mathematical model that best fits the data is;

The quadratic model

Since it has the largest R-squared value of 1.00

4 0

2 years ago

List the angles in order from the smallest to the largest.

Svetllana [295]

Answer:

D. <S, <R, <T

Step-by-step explanation:

Recall: On a triangle, the bigger an angle measure the longer the side opposite it and vice versa.

In ∆RST,

The longest side, SR = 22, is opposite to <T

Therefore, <T is the biggest angle.

Medium side, ST = 21, is opposite to <R, therefore,

<R is the medium angle measure

The smallest angle measure <S is opposite to the shortest side, RT.

Angels I'm order form the smallest to largest will be:

<S, <R, <T

8 0

2 years ago

What is the classification for this polynomial 2u^2vw^2

Alexxx [7]

It’s a monomial for sure

6 0

3 years ago

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Ana is retiring next year from the school that she has taught at for the last 25 years. Her pension pays a monthly salary of $1,

miskamm [114]

<span>Your answer would be $2,024.02.</span>

4 0

3 years ago

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