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Vsevolod [243]
2 years ago
10

Solve the system of equations. (HINT: use the elimination method) 7x+4y=2 9x-4y=30

Mathematics
1 answer:
igor_vitrenko [27]2 years ago
4 0

Answer: 7x + 4 y = 2

9x - 4y= 30

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

16x / = 32

x= 32:16

x=2

Step-by-step explanation: 7x+4y=2

7*2 + 4y=2

14 +4y=2

4y= 2-14

4y= -12

y= -12 : 4

y= - 3

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Passing through (2, - 2) and perpendicular to the line whose equation is y= 5x+2
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Step-by-step explanation:

Hey there!!!

Here,

Given, A line passes through point (2,-2) and is perpendicular to the y= 5x+2.

The equation of a straight line passing through point is,

(y - y1) = m1(x - x1)

Now, put all values.

(y  + 2) = m1(x - 2)

It is the 1st equation.

Another equation is;

y = 5x +2........(2nd equation).

Now, Comparing it with y = mx + c, we get;

m2=5

As per the condition of perpendicular lines,

m1×m2= -1

m1 × 5 = -1

Therefore, m2= -1/5.

Keeping the value of m1 in 1st equation.

(y + 2) =  \frac{ - 1}{5} (x - 2)

Simplify them.

5(y + 2) =  - x + 2

5y + 10 =  - x + 2

x + 5y + 8 = 0

Therefore the required equation is x+5y+8= 0.

<em><u>Hope it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

7 0
3 years ago
In standard form: (x+5)(3x-1)-(x-4)^2
denpristay [2]
I hope this helps you



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2x^2+22x-21
6 0
3 years ago
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Masja [62]

Answer:

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Len [333]

Step-by-step explanation:

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3 0
2 years ago
The area of a triangle is 24 square inches. What is the height of the triangle if the base length is 4 inches?
snow_tiger [21]
A = b*h*0.5
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h = 12

Height is 12 inches.
7 0
2 years ago
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