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3 years ago

3.4.2 Discuss: Relating to Functions helppp plzz gimme good exmpl ill give 100 points

Mathematics

1 answer:

goldenfox [79]3 years ago

7 0

Answer:

the function f(x) = x + 1 adds 1 to any value you feed it. You give it a 5, this function will give you a 6: f(5) = 5 + 1 = 6. Functions do have a criterion they have to meet, though. And that is the x value, or the input, cannot be linked to more than one output or answer.

Step-by-step explanation:

we could define a function where the domain X is again the set of people but the codomain is a set of number. For example , let the codomain Y be the set of whole numbers and define the function c so that for any person x , the function output c(x) is the number of children of the person x.

hop u get it

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Hello, a Maths question if anyone knows what to do Solve: 6(x+4)=30

eduard

Answer:

x = 1

Step-by-step explanation:

6(x+4)=30 (divide both sides by 6)

(x+4) = 30/6

x+4 = 5 (subtract 4 from both sides)

x = 5 - 4

x = 1

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4 years ago

Read 2 more answers

Identify the vertex focus axis of symmetry directrix and direction of opening if each

lara31 [8.8K]

Y = 2(x - 10) + 8
y = 2(x) - 2(10) + 8
y = 2x - 20 + 8
y = 2x - 12

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3 years ago

I need some help please

lesya [120]

Use the formula for secants in a circle. The formula for us in our situation is $x^2=239,000(239,000+8,000)$ . Work within the parenthesis first to get $x^2=239,000(247,000)$ . Do the multiplication now to get $x^2=5.9033*10^{10}$ . Take the square root of that to get x = 242,967.076 miles or, according to how your answer is to be stated, 243,000 miles.

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4 years ago

Five years ago, Nina was twice as old as Sam. In five years, she will be 1.5 times as old as Sam. How old are Nina and Sam now?

Margarita [4]

Answer:

age of Sam= 15 years

age of Nina = 25 years

Step-by-step explanation:

Let Nina's age be X years

Let Sam's age be Y years

Five years ago Nina's age will be X- 5 years

Five years ago Sam's age will be Y- 5 years

Given in question

Five years ago, Nina was twice as old as Sam

writing it mathematically using X and Y we have

Nina's age = 2 * Sam's age

X- 5 = 2 *(Y- 5)

X = 2 *(Y- 5) + 5 = 2Y - 10 + 5 = 2Y - 5 _________________equation A

__________________________________________________________

Five years in future Nina's age will be X+ 5 years

Five years ago Sam's age will be Y+ 5 years

Given in question

In five years, she will be 1.5 times as old as Sam

writing it mathematically using X and Y we have

Nina's age = 1.5 * Sam's age

X+5 = 1.5 *(Y+ 5)

X = 1.5*(Y+5) -5 = 1.5Y +7.5 - 5 = 1.5Y +2.5 _________________equation B

_______________________________________

in equation A we have X = 2Y - 5

in equation B we have X = 1.5Y + 2.5

equating equation A and B we have

2Y - 5 = 1.5Y +2.5

=> 2Y - 1.5Y = 2.5 + 5

=> 0.5Y = 7.5

=> Y = 7.5/0.5 = 15

from equation A we have

X = 2Y - 5 (substituting the value of Y = 15 in equation we have)

X = 2*15 - 5 = 25

Therefore age of Sam= 15 years

age of Nina = 25 years

4 0

3 years ago

The length of a side and corresponding height of a triangle are (x+3) and (2x-5) given that area of triangle is 20cm^2. Find the

vaieri [72.5K]

Answer:

x = 5

Step-by-step explanation:

The area (A) of a triangle is calculated as

A = $\frac{1}{2}$ bh ( b is the base and h is height )

Here A = 20, b = (x + 3) and h = (2x - 5) , then

$\frac{1}{2}$ (x + 3)(2x - 5) = 20 ← multiply both sides by 2

(x + 3)(2x - 5) = 40 ← expand left side using FOIL

2x² + x - 15 = 40 ( subtract 40 from both sides )

2x² + x - 55 = 0 ← in standard form

(x - 5)(2x + 11) = 0 ← in factored form

Equate each factor to zero and solve for x

x - 5 = 0 ⇒ x = 5

2x + 11 = 0 ⇒ 2x = - 11 ⇒ x = - 5.5

But x > 0 , so x = 5

8 0

3 years ago