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meriva
3 years ago
6

A binomial has been partially factored, as shown below: x2 − 25 = (x + 5)(_____) Which of the following binomials represents the

missing factor? (x − 5) (x + 5) (x − 20) (x + 20)
Mathematics
1 answer:
Anastaziya [24]3 years ago
7 0

The equation has -25, so the factored answer needs to be able to multiply and have a negative answer.

The missing part would be (x-5)

5 x -5 = -25

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Which expression finds the measure of an angle that is coternal with a 45° angle?
Serhud [2]

Answer:

-315

Step-by-step explanation:

same terminal side

7 0
3 years ago
15 pts. Prove that the function f from R to (0, oo) is bijective if - f(x)=x2 if r- Hint: each piece of the function helps to "c
solniwko [45]

Answer with explanation:

Given the function f from R  to (0,\infty)

f: R\rightarrow(0,\infty)

-f(x)=x^2

To prove that  the function is objective from R to  (0,\infty)

Proof:

f:(0,\infty )\rightarrow(0,\infty)

When we prove the function is bijective then we proves that function is one-one and onto.

First we prove that function is one-one

Let f(x_1)=f(x_2)

(x_1)^2=(x_2)^2

Cancel power on both side then we get

x_1=x_2

Hence, the function is one-one on domain [tex[(0,\infty)[/tex].

Now , we prove that function is onto function.

Let - f(x)=y

Then we get y=x^2

x=\sqrt y

The value of y is taken from (0,\infty)

Therefore, we can find pre image  for every value of y.

Hence, the function is onto function on domain (0,\infty)

Therefore, the given f:R\rightarrow(0.\infty) is bijective function on (0,\infty) not on  whole domain  R .

Hence, proved.

3 0
3 years ago
At a TV.repair shop, the amount charged for labor depends on the time the
Pepsi [2]

Answer:

A. Amount(hours worked)  

Step-by-step explanation:

Function notation is a way of converting a written description of a function to a concise form that is easy to read.

It is another way of representing the y-value in a function, y = ƒ(something)

Let's convert the word expression to function notation:

  • "The amount charged for labour depends on the time the repair technician works."
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  • "The amount is a function of the hours worked."
  • Amount = amount(hours worked)
  •           y = a(h)

6 0
3 years ago
the curved surface of a cylindrical surface is 704 cm square calculate the height when the radius is 8cm​
AlexFokin [52]

Answer:

CSA of cylinder = 704cm²

We know that

CSA of cylinder = 2πrh

or 2πrh = 704

or, 2*22/7 *8 *h = 704 ( since r=8cm)

or, 352h = 704*7

or, h = 4928/352 = 14cm

7 0
2 years ago
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puteri [66]

Answer: the second one

Step-by-step explanation:

5 0
3 years ago
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