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svetlana [45]
3 years ago
12

explain the relationship between a strategy such as number sense and a written method such as partial products or area models fo

r multiplying decimal numbers ​
Mathematics
2 answers:
aleksandrvk [35]3 years ago
8 0
There are a lot of differences between these two.

Step-by-step explanation:Firstly, strategy are all in mind and not on paper while written methods are solid proofs that are written on paper. Strategies may or may not work out with respect to the situation, while Written method will always work. They are actually written after testing their reliability. As far as you multiply decimal numbers these will go in vain and you have to use your mind to solve these
jasenka [17]3 years ago
4 0
Strategy are in mind and not written or illustrated on paper
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A rectangle has an area of 36 inches squared. Write an equation to show how the length (l) varies inversely the width (w).
Anastaziya [24]
Start with the first sentence, and the definition of the area of a rectangle:
l * w = 36

Rewrite the equation to get
l = 36 / w
or
w = 36 / l
Either one shows the inverse relationship between w and l.

Assuming the last part wants you to write an equation for an x-y graph, the equation would be
y = 36 / x
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3 years ago
In what time is sum of money triples itself at 5%p.a​
lorasvet [3.4K]

Answer:

Step-by-step explanation:

40 years

5 0
2 years ago
A rectangle, a triangle, and two congruent semicircles were used to form the figure shown. Rectangle 5cm,20cmcircle : radius 5cm
Schach [20]

Answer:

The area of a shape is the amount of space it occupies

Step 1:

We start by calculating the area of the rectangle using:

\begin{gathered} A_{rectangle}=l\times b \\  \end{gathered}

By substituting the values, we will have

\begin{gathered} A_{rectangle}=l\times b \\ A_{rectangle}=20cm\times5cm \\ A_{rectangle}=100cm^2 \\ A_1=100cm^2 \end{gathered}

Step 2:

we calculate the area of the triangle using:

A_{triangle}=\frac{1}{2}\times base\times height

By substituting the values, we will have

\begin{gathered} A_{tr\imaginaryI angle}=\frac{1}{2}\times base\times he\imaginaryI ght \\ A_{tr\mathrm{i}angle}=\frac{1}{2}\times10cm\times8cm \\ A_{tr\mathrm{i}angle}=\frac{80cm^2}{2} \\ A_{tr\mathrm{i}angle}=40cm^2 \\ A_2=40cm^2 \end{gathered}

Step 3:

Calculate the area of the two semicircles

A_{semicircle}=\frac{\pi r^2}{2}

By substituting the values, we will have

\begin{gathered} A_{sem\imaginaryI c\imaginaryI rcle}=\frac{\pi r^{2}}{2} \\ A_{sem\mathrm{i}c\mathrm{i}rcle}=3.14\times\frac{5^2}{2} \\ A_{sem\mathrm{i}c\mathrm{i}rcle}=39.25cm^2 \\ Area\text{ of two semicircle will be} \\ A_3=39.25cm^2\times2 \\ A_3=78.5cm^2 \end{gathered}

Step 4:

Calculate the area of the shape

We will calculate the area of the shape by adding all the individual areas together

A_{shape}=A_1+A_2+A_3

By substituting the values, we will have

\begin{gathered} A_{shape}=A_{1}+A_{2}+A_{3} \\ A_{shape}=100cm^2+40cm^2+78.5cm^2 \\ A_{shape}=218.5cm^3 \end{gathered}

Hence,

The area of the shape will be

\Rightarrow218.5cm^2

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1 year ago
Mrs. Van and her family went bowling. The total cost of the shoes was $12 and the cost to bowl was $5 per game. Write an equatio
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Answer: 12+5x=y

Step-by-step explanation:

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Where would the circumcenter of a circle be found?
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The answer would be (b)
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