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Taya2010 [7]
3 years ago
9

guys i need help with solving the system of equations and combining the equations. also show your work. the equations are x-4y=-

12 and 4x-y=12. i need the answer in coordinates. i only need help with 3 questions with this.
Mathematics
1 answer:
Firdavs [7]3 years ago
5 0
X-4y=-12
4x-y=12

eliminate y's
multily 2nd equaiton by -4 and add to top one

x-4y=-12
<u>-16x+4y=-48 +
</u>-15x+0y=-60

-15x=-60
divide both sides by -15
x=4
sub back
x-4y=-12
4-4y=-12
minus 4 both sides
-4y=-16
divide both sides by -4
y=4

x=4
y=4
(x,y)
(4,4)<u>
</u>
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Svetach [21]

<em>only the last figure (i.e figure e) is shaded </em>

The shaded region is a triangle

Area of a triangle

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6 0
2 years ago
An inverse variation function has a k value of 8. Which ordered pair is on the graph of the function?
Vinvika [58]

The points on the graph of the inverse variation are of the form:

(x, 8/x)

<h3>Which ordered pairs are on the graph of the function?</h3>

An inverse variation function is written as:

y = k/x.

Here we know that k = 8.

y = 8/x

Then the points (x, y) on the graph of the function are of the form:

(x, 8/x).

So evaluating in different values of x, we can get different points on the graph:

  • if x = 1, the point is (1, 8)
  • if x = 2, the point is (2, 4)
  • if x = 3, the point is (3, 8/3)
  • if x = 4, the point is (4, 2)

And so on.

If you want to learn more about inverse variations:

brainly.com/question/6499629

#SPJ1

7 0
1 year ago
In oak valley the cost of gas averaged $3.50 per gallon qt the start of April the rose 6% during April and dropped 10% during Ma
andreev551 [17]

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$ 3.34

Step-by-step explanation:

3.50 * 1.06    cost at end of April    then find 90% of this to find end of May

3.50 * 1.06    * .9 = $ 3.34

8 0
2 years ago
Kevin is 6 years older than Timothy, and 4 years ago Kevin was twice as old as Timothy. Find their present ages.
vovangra [49]
<span>Kevin is 16
Timothy is 10
------------
check:
4 yrs ago Kevin was 12
4 yrs ago Timothy was 6
Kevin was twice his age
OK</span>
6 0
3 years ago
Use mathematical induction to prove that, for n ≥ 1, n³ – n is divisible by 3.
ICE Princess25 [194]

Answer:

Step-by-step explanation:

5 0
1 year ago
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