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artcher [175]
3 years ago
13

Which of these pairs are like terms? 20 x, 0.8 x 17, 3 x 14 x, 14 x2 0.5 x, 0.5 y

Mathematics
1 answer:
egoroff_w [7]3 years ago
3 0

Step-by-step explanation:

=20x14x;14x2x0;8x17;3x0;5x0;5y

=280x28x13;84x0;25y

=7840x3;46y

=27 126;4y

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Can someone please help??
Vsevolod [243]

Answer:

let the number of cows = x

let the number of chickens = y

since there are 42 heads:

x + y = 42

and since a cow has 4 legs, and a chicken has 2

4x + 2y = 144

from first equation:

x + y  = 42

x = 42 - y (now, we will substitute this in the second equation)

4(42 - y) + 2y = 144

168 - 4y + 2y  = 144

2y = 168 - 144

2y = 24

y = 12

now, we know the number of chickens. we will replace y with 12 in the first equation since it is more simpler

x + 12 = 42

x = 30

So, there are 30 cows and 12 chickens

Brainly it if you find the answer helpful

5 0
3 years ago
Anna jogs every morning. The graph shows the distance she jogs. What does the slope of the line represent?
oksian1 [2.3K]
I believe that the answer is C!
8 0
3 years ago
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Which statements must be true?
iVinArrow [24]

Answer:

Following are the solution to the given question:

Step-by-step explanation:

Please find the complete question in the attached file:

Using the formula for Mid-point:

\bar{AB} || \bar{XZ} \\\\CA= \frac{1}{2} \ YZ\\\\\bar{CB} |||\bar{XY}

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3 years ago
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Select the correct answer from each drop-down menu.
Mrrafil [7]

Using the classification for even and odd functions, it is found that the function is even, because f(-x) = f(x).

<h3>How we verify if the function is even, odd, or neither?</h3>

  • If for all values of x, f(x) = f(-x), the function is even.
  • If for all values of x, f(-x) = -f(x), the function is odd.
  • If neither of these statements are true, the function is neither even nor odd.

Graphing the function f(x) = 3x^4 - 5x^2, for every value of x, f(x) = -f(x), that is, the function is symmetric over the y-axis, hence it is even.

More can be learned about even and odd functions at brainly.com/question/5634052

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4 0
2 years ago
To estimate the average annual expenses of students on books and class materials a sample of size 36 is taken. The sample mean i
Elena L [17]

Answer:

C) $826.82 to $873.18.

Step-by-step explanation:

Sample mean (M) = $850

Standard deviation (s) = $54

sample size (n) = 36

Z for 99% confidence interval (Z) = 2.576

The confidence interval is determined by the following relationship:

M \pm Z*\frac{s}{\sqrt{n}}

Applying the given values, the lower (L) and upper (U) values are:

850 \pm 2.576*\frac{54}{\sqrt{36}}\\L=\$826.82\\U=\$873.18

The answer is C) $826.82 to $873.18.

6 0
3 years ago
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