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Alexxx [7]
3 years ago
8

-9 irrational or rational

Mathematics
2 answers:
Anna [14]3 years ago
6 0

A rational number is a number that can be written as a ratio. That means it can be written as a fraction, in which both the numerator (the number on top) and the denominator (the number on the bottom) are whole numbers. The number -9 is a rational number because it can be written as the fraction -9/1.

valina [46]3 years ago
5 0

-9 is a rational number.

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Please help with #19!
ikadub [295]

Answer:

a) yes

b) 2560

Step-by-step explanation:

An exponential function has a common ratio between points uniformly spaced. Here, the data points are 10 years apart.

The ratio of the first two values is 4000/5000 = 0.8.

The ratio of the next two values is 3200/4000 = 0.8.

These ratios are the same, so the data is consistent with an exponential function.

The common ratio can be used to predict the next value. The next value is predicted to be ...

  3200 × 0.8 = 2560

8 0
3 years ago
4(x – 2 + y)<br> What the answer
dmitriy555 [2]

Answer:

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Step-by-step explanation:

Distribute

4(x – 2 + y)

4*x -4*2 +4*y

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6 0
3 years ago
Which of these strategies would eliminate a variable in the system of equations? \begin{cases} 6x + 5y = 1 \\\\ 6x - 5y = 7 \end
IRISSAK [1]

Answer:

x = 0.667 and y = -0.6

Step-by-step explanation:

Given that,

6x + 5y = 1 ....(1)

6x - 5y = 7 ...(2)

We need to solve the above equations.

Subtract equations (1) and (2)

6x + 5y -(6x - 5y) = 1-7

6x+5y-6x+5y = -6

10y=-6

y = -0.6

Put the value of y in equation (1).

6x + 5(-0.6) = 1

6x = 1-5(-0.6)

6x = 4

x = 0.667

Hence, first step is to subtract equation (1) and (2) then put the value of y in equation (1).

3 0
2 years ago
If 8x-10=3x+90 what is x​
Elan Coil [88]

Answer:

x = 20

Step-by-step explanation:

8x - 10 = 3x + 90

5x = 100

x = 20

7 0
3 years ago
Zoe says 247 rounded to the nearest hundred is 300 because 247 rounds to 250 and 250 rounds to 300.Is Zoe correct? Explain.
Ede4ka [16]

Answer: 123134

Step-by-step explanation: it is

5 0
3 years ago
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