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MatroZZZ [7]
2 years ago
15

The sum of two-fifths of a number and three-tenths of the number.

Mathematics
2 answers:
Lena [83]2 years ago
6 0

Answer:

Seven out of ten

Step-by-step explanation:

enyata [817]2 years ago
6 0

Answer:

7/10

Step-by-step explanation:

2/5+3/10=4/10+3/10=7/10

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The length of a rectangular frame is represented by the expression 2x 4, and the width of the rectangular frame is represented b
antoniya [11.8K]

The equation that can be ued to solve for the width of the rectangular frame is 2x² + 14x - 40 = 0.

<h3>What is the equation that can be used to solve for the width?</h3>

A rectangle is a 2-dimensional quadrilateral with four right angles.

Area of a rectangle = length x width

(2x + 4) x (2x + 10) = 120

Expand the brackets

4x² + 20x + 8x + 40 = 120

Add similar terms

4x² +28x + 40 = 120

4x² +28x - 80 = 0

Divide through by 2

2x² + 14x - 40 = 0

To learn more about how to calculate the area of a rectangle, please check: brainly.com/question/16595449

3 0
2 years ago
A square has sides of forty centimetres. What is its area?
Otrada [13]

Answer:

40×40=1600cm²

Step-by-step explanation:

times the length and width which for a square are the same.

4 0
2 years ago
Which of the following results in a sum or a product that is rational? Choose all that apply. (3 points)
Kazeer [188]

Remark

It is easier in this case to state the irrational ones and then talk about the rationals.

sqrt(2) * sqrt(3) is irrational. The square root of 6 fills your calculator's window with many numbers and there is no pattern to them. Sqrt(6) cannot be expressed as a fraction or a repeating decimal which is also a fraction.

The last one is also irrational for the same reason. 3*pi cannot be expressed as either a repeating decimal or a fraction.

All the others are rational. The one you might have trouble with is the first one.

0.12 repeating is actually found by letting x = 0.12121212121212121212...Then

100 x =  12.121212121212121212 ...

<u>       x =    0.121212121212121212..</u>.     Subtract

99 x = 12

x = 12/99

So the mixed fraction you get is 3 12/99 which is 309/99

When you multiply that by 1.4 it does not change the fact that you still get a fraction. It turns out to be 721 / 165.  The method is similar to the one used to get 12 / 99. I don't think you need to know the exact answer. You need only need to know that the first one is rational.

Choice 2 is rational because 9 and 25 are  perfect squares. sqrt(9) = 3

Sqrt(25) = 5.

3*5 = 15.

Answer

One Two are four are all rational.

3 0
3 years ago
Is y=2x(x-2) a quadratic function????
Liula [17]
The graph opens downward, so the vertex is the maximum point of the parabola. Example: The vertex of the parabola y = -(x + 9)2 + 4 is (-9, 4). The graph opens downward, so the vertex is the maximum point of the parabola.
...
If the value of "a" is positive, the parabola will open upward.
5 0
3 years ago
A town has a population of 14000 and grows at 3% every year. What will be the population after 6 years, to the nearest whole num
Fofino [41]

Answer:

Step-by-step explanation:

3x6= 18 then 14000 x 18 = 252,000

7 0
3 years ago
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