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ycow [4]
3 years ago
15

20-x2/y-x for x=2 and y=6

Mathematics
2 answers:
Amanda [17]3 years ago
8 0

\text{Hello there!}\\\\\text{Plug in the numbers and solve:}\\\\\frac{20-x^2}{y-x}\\\\\frac{20-2^2}{6-2}\\\\\frac{20-4}{6-2}\\\\\frac{16}{4}\\\\=4\\\\\boxed{\text{Answer: 4}}

MaRussiya [10]3 years ago
7 0
Use substitution to solve the equation:
20-4/4.
4/4=1 so it simplifies to 20-1 which equals 19
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ValentinkaMS [17]
Simplify and evaluate

9) 6x^2 - 27 + 4x^3

10) -7x2 - 5x + 9
6 0
2 years ago
Find the number a for which x=5 is a solution of the given equation.
vfiekz [6]

Step-by-step explanation:

x + 8a = 25 + ax - 7a

x = 5

5 + 8a = 25 + 5a - 7a

5 + 8a = 25 - 2a

5 + 10a = 25

10a = 20

a = 2

3 0
1 year ago
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Artyom0805 [142]
It’s basically asking you to put it into the graph. Least to greatest.
3 0
2 years ago
2.
dimaraw [331]

Answer:

-7 < -4 < 0 < 7

Step-by-step explanation:

Given

Change: -4, 7, -7 and 0

Required

Compare them

From the list of given options, we can observe that the inequality < is used in all options.

This implies that we arrange from least to highest

The least is -7

Then, -4

Then 0

And lastly, 7

So, we have:

-7 < -4 < 0 < 7

3 0
2 years ago
F(z) = (z - 5)(2x + 7) (73 = 3) has zeros at x = -3.5, x=3/7 , x=5 What is the sign of f on the interval 3/7 &lt; x &lt;5?
Gwar [14]
<h3>Answer:     Negative</h3>

======================================================

Explanation:

3/7 = 0.42857 approximately

Pick a number between that value and 5, not including either endpoint. Let's say we pick x = 2

Plug x = 2 into the f(x) function

f(x) = (x - 5)(2x + 7)(7x-3)

f(2) = (2 - 5)(2*2 + 7)(7*2-3)

f(2) = (2 - 5)(4 + 7)(14-3)

f(2) = (-3)(11)(11)

f(2) = -363

The actual result doesn't matter. All we're after is whether the result is positive or negative. We see the result is negative. This means f(x) is negative when 3/7 < x < 5. The f(x) curve is below the x axis on this interval.

3 0
3 years ago
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