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slavikrds [6]
3 years ago
9

How to do this , PLEASE HELP

Mathematics
1 answer:
Oksana_A [137]3 years ago
7 0
\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]  x^{123}  x_{123}  \sqrt[n]{x}  \sqrt[n]{x}  x_{123}  \lim_{n \to \infty} a_n  \int\limits^a_b {x} \, dx =1
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A rectangle has length 72 cm and width 56 cm. The other rectangle has the same area as this one, but its width is 21 cm. What is
Ira Lisetskai [31]

The length of the rectangle is = 72 cm

The width of the rectangle is = 56 cm

Area of the rectangle is = length*width

= 72\times56=4032 cm²

As given, the other rectangle has the same area as this one, but its width is 21 cm.

Let the length here be = x

4032=x*21

x=\frac{4032}{21}=192

Hence, length is 192 cm.

We can see that as width decreases, the length increases if area is constant and when length decreases then width increases if area is constant.

So, in the new rectangle,constant of variation=k is given by,

\frac{192}{72}=\frac{8}{3} or \frac{56}{21}=\frac{8}{3}

Hence, the constant of variation is \frac{8}{3}

7 0
2 years ago
Refer to the data above. What number represents the slope of the line, if the points on the graph above were joined?
Dmitrij [34]

Answer:

slope = 40

Step-by-step explanation:

Calculate the slope m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (2, 80) and (x₂, y₂ ) = (4, 160) ← 2 points on the line

m = \frac{160-80}{4-2} = \frac{80}{2} = \frac{40}{1} = 40

4 0
2 years ago
There are 27 pupils. There are twice as many boys than girls. how many boys and girls are there
Anna71 [15]
Let x  =  the numbers of girls
thus
the numbers of boys  = 2x 
x + 2x = 27
3x = 27
x = 9
2x = 2 . 9 =18
girls  =  9  &  boys  = 18
3 0
3 years ago
Read 2 more answers
If U = {all positive integers} and A = {x|x ∈ U and x is an odd positive integer}, which describes Ac?
tekilochka [14]
The answer is:


D. Ac = {xΙx ∈ U and is an even positive integer}

:)
6 0
3 years ago
Read 2 more answers
Six and forty-two ten-thousandths as a decimal
sergey [27]

Answer:

6.0042

Step-by-step explanation:

6 and forty-two ten-thousandths as a decimal.

mixed number : 6\frac{42}{10,000}

decimal : 6.0042

7 0
3 years ago
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