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Nutka1998 [239]
3 years ago
9

The number shown above belongs to which of the following subsets of the real numbers?

Mathematics
2 answers:
SVETLANKA909090 [29]3 years ago
4 0
It’s a rational number
Nookie1986 [14]3 years ago
3 0

Answer:

Rational

Step-by-step explanation:

the rational number subset contains fractions

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This is easy can u help plss??
Maksim231197 [3]

Answer:

28

Step-by-step explanation:

cause

7 0
2 years ago
What are the exact solutions of x2 − 5x − 7 = 0, where x equals negative b plus or minus the square root of b squared minus 4 ti
Marat540 [252]

Answer:

x = \frac{5 + \sqrt{53}}{2}  or  x = \frac{5 - \sqrt{53}}{2}

Step-by-step explanation:

Given

x^2 - 5x - 7 = 0

Required

Solve for x using:

x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}

First, we need to identify a, b and c

The general form of a quadratic equation is:

ax^2 + bx + c = 0

So, by comparison with x^2 - 5x - 7 = 0

a = 1     b = -5      c = -7

Substitute these values of a, b and c in

x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}

x = \frac{-(-5) \± \sqrt{(-5)^2 - 4 * 1 * -7}}{2 * 1}

x = \frac{5 \± \sqrt{25 +28}}{2}

x = \frac{5 \± \sqrt{53}}{2}

Split the expression to two

x = \frac{5 + \sqrt{53}}{2}  or  x = \frac{5 - \sqrt{53}}{2}

To solve further in decimal form, we have

x = \frac{5 + 7.28}{2}  or  x = \frac{5 - 7.28}{2}

x = \frac{12.28}{2}  or  x = \frac{-2.28}{2}

x = 6.14 or x = -1.14

4 0
3 years ago
7th grade math help me pleaseeee
garik1379 [7]
The answer to how many batches is 9, hope this helped.
4 0
2 years ago
Ethan burns 650 calories when he runs for 1 hour. Soppose he runs 5 hours in one week
alex41 [277]
650 x 5=3250 calories
3 0
3 years ago
NEED HELP FAST!!!!!!!!!!!
erica [24]

Answer:a=3/4

b=3/4

Step-by-step explanation:

3a+5b=6

9a+7b=12

-3(3a+5b)=-3(6)

9a+7b=12

-9a-15b=-18

9a+7b=12

-8b=-6

b=3/4

3a+5(3/4)=6

3a+15/4=6

3a=9/4

a=3/4

7 0
3 years ago
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