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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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Dmitrij [34]

Answer: All the real values except x ≠ 7 and the x for which f(x)≠-3

Step-by-step explanation:

Since, For function f , the domain is R - {7}

That is, If x is any element of the domain of the function f,

Then,  x ≠ 7

(gof)(x) = g(f(x))

Since, For the function g, the domain is R - {-3}

Thus,  If f(x) is any element of the domain of the function g,

Then f(x)≠ -3

Hence, Fourth Option is correct.

8 0
3 years ago
Solve for x in the following system<br><br> 6x + 6y = -2<br> y = -x
klasskru [66]
6x + 6(-x) = - 2
6x - 6x = - 2

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8 0
3 years ago
If x varies directly as y and x= 18 when y =3 find x when y=7
denpristay [2]

Answer:

42

Step-by-step explanation:

x = Ky

18 = K(3)

K = 18/3 = 6

x = 6y

x = 6(7) = 42

5 0
3 years ago
Orange crayons are usually made in batches of 100. If it takes 22 pounds of wax to make 100 orange crayons,then how much wax wil
bogdanovich [222]

Amount of wax required for one orange crayon is 0.22 pounds.

Step-by-step explanation:

According to given statement;

22 pounds of wax = 100 orange crayons

For calculating wax for one crayon;

Wax required for one crayon = Total pounds of wax / Total no of crayons

Wax required for one crayon = \frac{22}{100}

Wax required for one crayon = 0.22

Amount of wax required for one orange crayon is 0.22 pounds.

Keywords: Crayon, Division.

Learn more about division at:

  • brainly.com/question/1949601
  • brainly.com/question/1952668

#LearnwithBrainly

7 0
3 years ago
need help please. Problem: Construct a triangle with interior angle measures of 45° and 45°. The third angle of the triangle is
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The angles of a triangle add to 180 degrees so the remaining angle must be 90°.

This triangle is half a square. It's one of the two tired triangles of trig, the other being half an equilateral triangle, 30°/60°/90°.

4 0
3 years ago
Read 2 more answers
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