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igor_vitrenko [27]
3 years ago
13

Solve this system by ELIMINATION!9x-12y=15 -4x+4y=0​

Mathematics
1 answer:
Andreas93 [3]3 years ago
5 0

Answer:

x = -5

y = -5

Step-by-step explanation:

here's the solution :-

multiply equation (2) with 3

we get,

=》9x - 12y = 15

=》-12x + 12 y = 0

by adding the equations, :-

=》9x - 12y - 12 x + 12y = 15 + 0

=》-3x = 15

=》x = 15 ÷ -3

=》x = -5

putting the value of x as -5 in equation (2)

=》-4x + 4y = 0

=》( -4 × -5 ) + 4y = 0

=》20 + 4y = 0

=》4y = - 20

=》 y = -20 ÷ 4

=》y = -5

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dedylja [7]

Answer:

174,862,593

Step-by-step explanation:

I just added them all together

8 0
3 years ago
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The area of Caitlins square garden is 345 ft.². One side of the garden is next to a shed. She wants to put a fence around the ot
NikAS [45]

Hey there!!

The formula for the area of a square -  s²

where s = side

s² = 345

s = √345

s = 18.57 ft

Fence shall be three sides

So 18.57 × 3

The required answer = 55.71 ft

Hope my answer helps!

3 0
3 years ago
F(x)=x^2-3x-54 g(x)=x-9, find (f/g)(x)
MAVERICK [17]

Answer:

Function Operation: f/x-9

Step-by-step explanation:

5 0
3 years ago
the sides of a triangular birdcage are consecutive intergers if tge perimeter is 114 cm what is tge length of each side
alexandr402 [8]
Let:
x = first consecutive integer (or first side of △)
x + 1 = second consecutive integer (or second side of △)
x + 2 = third consecutive integer (or third side of △)

The formula for a perimeter of △ is simply the addition of three sides (or length). Since the given perimeter is 114 cm,
x + x+1 + x+2 = 114
3x + 3 = 114
3x = 114 - 3
3x = 111
x = 111 /3 = 37 cm
The three sides are 37 cm, 38 cm, and 39 cm.
5 0
3 years ago
Writing equations of lines
Valentin [98]

Step-by-step explanation:

Equation of straight line is y=mx+c

choose any two points on straight line

for me I choose:(-3,11) and (3,-1)

use these two points to find gradient,m.

m= (-1-11)/(3-(-3))

m= -2

now, y=-2x+c

choose any point on the straight line

I choose point (3,-1)

sub the point into the equation to find c

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c=5

equation: y=-2x+5

7 0
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