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blagie [28]
2 years ago
13

F(x) = -8 (5-x), what is the value of f(-4)?

Mathematics
1 answer:
Morgarella [4.7K]2 years ago
4 0

Answer:

f(-4) is basically just saying that you need to use the function given while x = -4.

The function given:

f(x) = -8(5-x)

We see that f(-4) means that x has to be -4, so we can substitute it in:

f(-4) = -8(5-(-4))

f(-4) = -8(9)

f(-4) = -72

Therefore, f(-4) is -72.

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How do I solve the linear equation of 27=6(x)+4(y) over 20=2(x)+5(y)
larisa86 [58]
<u>27 = 6x + 4y </u>= 1 7/20 = 3 4/5<u>
</u>20 = 2x + 5y<u>
</u>
8 0
3 years ago
Help help help help help
Arada [10]

Answer:

12f-5f²+6f+10f²= 10f²-5f²+12f+6f=5f²+18f

5 0
3 years ago
2x + 4y = 15<br> 6x +12y = 45<br><br> What would the solution to the system of equations be?
Dimas [21]

Answer:

They both have an infinite number of solutions.

Step-by-step explanation:

Given system of equations:

a) 2x + 4y = 15

b) 6x + 12y = 45

Slope-intercept form: y = mx + b

<u>where:</u>

  • m is the slope
  • b is the y-intercept (when x = 0)

Rewrite <em>both</em> equations into slope-intercept form:

<em>a) 2x + 4y = 15 </em>

⇒ 2x + 4y = 15 [subtract 2x from both sides]

⇒ 2x - 2x + 4y = 15 - 2x

⇒ 4y = - 2x + 15 [divide both sides by 4]

⇒ 4y ÷ 4 = (-2x ÷ 4) + (15 ÷ 4)

\sf \implies y = -\dfrac{1}{2}x\ + \dfrac{15}{4} \ or \ y=-0.5x\ + 3.75

<em>b) 6x + 12y = 45</em>

⇒ 6x + 12y = 45 [subtract 6x from both sides]

⇒ 6x - 6x + 12y = 45 - 6x

⇒ 12y = - 6x + 45 [divide both sides by 12]

⇒ 12y ÷ 12 = (-6x ÷ 12) + (45 ÷ 12)

\sf \implies y = -\dfrac{1}{2}x\ + \dfrac{15}{4} \ or \ y=-0.5x\ + 3.75

New equations:

\sf a)\ y = -\dfrac{1}{2}x\ + \dfrac{15}{4} \ or \ y=-0.5x\ + 3.75\\\\\sf b)\ y = -\dfrac{1}{2}x\ + \dfrac{15}{4} \ or \ y=-0.5x\ + 3.75

Both equations have the same slope (-½), and y-intercept (3.75). Therefore, they both have an infinite number of solutions.

System of equations can have the following:

<u><em>No Solution:</em></u> the same slope (both lines will be parallel)

<u><em>One Solution:</em></u> different slopes and different y-intercepts

<u><em>Infinitely Many Solutions:</em></u> the same slope and y-intercept

Learn more about system of equations here:

brainly.com/question/19575460

brainly.com/question/12198631

7 0
2 years ago
Read 2 more answers
Find the selling price<br> original price: $16.95<br> discount: 54%<br> tax: 4%
Marta_Voda [28]

Answer:

$8.11

Step-by-step explanation:

Original Price: $16.95

Discount: 54% Decimal Form: .54

Tax: 4% Decimal Form: .04

Let's start with the discount...

16.95 x .54 =9.153 Round = 9.15

16.95 - 9.15=7.80

Now, for the tax..

7.80 x .04=0.312 Round = 0.31

7.80 + 0.31=8.11

Hence. the Selling price is $8.11

5 0
2 years ago
VERBAL<br> 2. Explain how to find the output variable in a word problem that uses a linear function.
Verizon [17]

Answer:

The dependent variables in most cases is output variable. That is a value that depends on some other input value and changes based on that input value.

Step-by-step explanation:

  • In the question, it is given that a problem uses an output variable.
  • It is required to explain how to find the output variable in a word problem that uses a linear function.
  • In order to find the output variable in a world problem, for the dependent variable.
  • That is a value that depends on some other input value and changes based on that input value.
  • It cannot change independently. In these types of functions, this value is mostly marked as y or f(x).
5 0
1 year ago
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