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Harrizon [31]
2 years ago
9

Which of the expressions is rational

Mathematics
1 answer:
miv72 [106K]2 years ago
6 0

Answer:

the third one

Step-by-step explanation:

the square root of 25 is 5. 5+2 = 7.

this is a rational number (the set of all integers and fractions).

the other 2 portions contain at least one element that is not rational. and so the sum with such a number is not rational.

45 and 7 are no square numbers, and therefore the square root of these numbers contains a neverending chain of digits after the decimal point without having any repeating pattern. these are real numbers but not rational numbers.

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Pls answer quick it's gr 9 academic math lol
SVETLANKA909090 [29]

Answer:

1. (3^3 + 3^2)^2 actually equals (27 + 9)^2

which is the first mistake

2. (27 + 9)^2 does not equal (3^5)2, so (36)^2 does not equal 3^7

3. 3^7 DOES NOT EQUAL 21

Step-by-step explanation:

when you add powered numbers together, it does not multiply it, as your example:

1. (3^3 + 3^2)^2 actually equals (27 + 9)^2

which is the first mistake

2. (27 + 9)^2 does not equal (3^5)2, so (36)^2 does not equal 3^7

3. 3^7 DOES NOT EQUAL 21

4 0
3 years ago
Read 2 more answers
What is the missing value in the equation shown?
Sliva [168]
Such fried beautiful
6 0
3 years ago
Does anyone know these maths questions???
saveliy_v [14]

I'll do problem 12 to get you started

----------------------------------------

Part (a)

The ratio 3:6:7 means the three sides are 3x, 6x and 7x centimeters long. The x is some positive real number.

The longest side is 7x, which is also 16.1, so 7x = 16.1

Divide both sides by 7 to isolate x

7x = 16.1

7x/7 = 16.1/7

x = 2.3

Now we can calculate the other two sides

3x = 3*2.3 = 6.9

6x = 6*2.3 = 13.8

<h3>The other two sides are 6.9 cm and 13.8 cm</h3>

----------------------------------------

Part (b)

Add up the three sides to get

6.9 + 13.8 + 16.1 = 36.8

<h3>The perimeter is 36.8 cm.</h3>

3 0
3 years ago
The two figures are similar. write the similarity. justify your answer.
scoray [572]

Answer:

The corresponding sides are in proportion. so they are similar triangles.

8 0
4 years ago
What is the initial value of the function represented by this graph
laiz [17]

Answer:

The initial value of the function is 5

Step-by-step explanation:

we know that

The initial value of the function, is the value of the function when the value of x is equal to zero (the y-intercept)

In this problem

Observing the graph

The y-intercept is the point (05)

therefore

The value of the function for x equal to zero is 5

8 0
3 years ago
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