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solniwko [45]
4 years ago
6

Evaluate the function : f(x)=2x-5 for f(-4)

Mathematics
1 answer:
AleksAgata [21]4 years ago
3 0

Answer:

-13

Step-by-step explanation:

f(x)=2x-5 for f(-4)

Let x=-4

f(-4) = 2(-4) -5

      = -8 -5

         =-13

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If a and b are positive constants and if a(x-y) = b(y-x), what is the value of the ratio of x/y?
Mekhanik [1.2K]

Answer: x/y=1

Step-by-step explanation:

a(x-y)=b(y-x)

(a+b)x=(a+b)y

x/y=1 ans

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8 0
3 years ago
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3 years ago
Suppose xy > 0. Describe the points whose coordinates are solutions to the inequality.
Elan Coil [88]

The solutions fo the inequality are all the points (x, y) that meet these 3 conditions.

  • x ≠ 0
  • y ≠ 0
  • Sign(x) =sign(y)

<h3>Which points are solutions of the inequality?</h3>

We want to find points of the form (x, y) that are solutions of the inequality:

x*y > 0

Clearly x and y must be different than zero.

So, for example if x = -1, y can be any negative number, for example y= -3

x*y > 0

(-1)*(-3) > 0

3 > 0

This is true.

Now if x  = 1, y must be positive. LEt's take y = 103, then:

x*y > 0

1*103 > 0

103 > 0

Then we have 3 conditions:

  • x ≠ 0
  • y ≠ 0
  • Sign(x) =sign(y)

The solutions fo the inequality are all the points (x, y) that meet these 3 conditions.

If you want to learn more about inequalities:

brainly.com/question/25275758

#SPJ1

4 0
2 years ago
What is 417 in expanded from ?
myrzilka [38]

Answer:

400 + 10 + 7

Step-by-step explanation:

it could be 4 times 100 plus 10 times 1 plus 1 times 7

4 0
4 years ago
Which statement is true about the difference 2 square root of 7 − square root of 26?
lora16 [44]

2√7 - √26 ≈ 5.29150262213... - 5.09901951359...

... ≈ 0.19248310854...

The result is an irrational number not described by any of your answer selections.

None of the statements is true.

7 0
4 years ago
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