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otez555 [7]
3 years ago
15

Select the equation that contains the point (4, -8), and in which the graph of the line has a positive slope.

Mathematics
1 answer:
BaLLatris [955]3 years ago
5 0
Okay, let me just make this a little clearer. Hopefully, this is what you meant:

A. y - 8 = -4(x + 4)
B. y - 8 = 4(x + 4)
C. y + 8 = 4(x - 4)
D. y + 8 = -4(x - 4)

--

This can also be written as y2 - y1 = m(x2 - x1).

Your M is your slope. 

Both A and D have their m as a negative 4. Because you are looking for a positive slope, immediately cancel those answers.

* note that you could have also put them in a more standard form and discovered m which is the x in bx. 

Now, you are looking for an equation that contains (4,-8).

Because it is written as y2-y1, your y's are actually points if you were to find another slope or something. This part is a bit hard to explain, but -8 is only found in the y coordinate place in answer B. Your answer would be B. For more explanation on that, there's this great site called coolmath.com and if you search for finding the equation of two points, it explains it much better on there, but I would not want to plagiarize. 

The answer is B.


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In a group of students. 20 study Account. 21 Study mathematics 18 study history 7 study account only 10 study mathematics only 6
kirill [66]

Answer:

In total there are 50 students.

Step-by-step explanation:

Since in a group of students 20 study account, 21 study mathematics, 18 study history, 7 study account only, 10 study mathematics only, 6 study account and mathematics only and 3 study mathematics and history only, to determine how many student are there altogether the following calculation must be performed:

7 + 10 + 6 + 3 = 26

Account = 20 - 7 - 6 = 7

Mathematics = 21 - 10 - 6 - 3 = 2

History = 18 - 3 = 15

26 + 7 + 2 + 15 = X

50 = X

Therefore, in total there are 50 students.

7 0
3 years ago
Solve the inequality -8x < 32
deff fn [24]

Answer:

x>-4

Step-by-step explanation:

-8x<32       -       First isolate the x by dividing both sides by -8

-8x/-8<32/-8      

x>-4

<h2><u>When you divide or multiply by a negative the inequality sign flips.</u></h2>

<u></u>

4 0
3 years ago
Read 2 more answers
20 point Which of the following is a solution of x2 + 4x + 25? (1 point)
Dafna11 [192]
2 + I square root of 21
5 0
2 years ago
Given the algebraic expression 12x+12/x²-1 do the following:
andre [41]

The value of the function is x is 7 and 4 are 2 and 12 respectively

<h3>Function and values</h3>

Given the function of the variable x below;

f(x) = 12x+12/x²-1

If the value of x is 7, hence;

f(7) = 12(7)+12/(7)²-1

f(7) = 84+12/48
f(7) = 96/48

f(7) = 2

If the value of x is 4, hence;

f(4) = 12(4)+12/(4)²-1

f(4) = 48+12/15

f(4) = 60/5

f(4) = 12

Hence the value of the function is x is 7 and 4 are 2 and 12 respectively

Learn more on function and values here: brainly.com/question/2284360

#SPJ1

7 0
2 years ago
Write the expression in complete factored form<br><br> 4u^2(a-3)+q(a-3)
Sauron [17]

[ Answer ]

\boxed{\bold{4au^{2} \ - \ 12u^{2} \ + \ aq \ - \ 3q}}

[ Explanation ]

  • Factor: 4u^{2}(a - 3) + q(a - 3)

-------------------------------------

  • Expand 4u^2\left(a-3\right): 4au^2-12u^2

4au^2-12u^2+q\left(a-3\right)

  • Expand

q\left(a-3\right): aq-3q

  • Answer

4au^2-12u^2+aq-3q

\boxed{\bold{[] \ Eclipsed \ []}}

3 0
3 years ago
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