value of x =-4 and value of y=-3
(-4,-3) is the solution of system of equations.
Step-by-step explanation:
We need to solve the system of equations
Rearranging:
Multiply eq(2) with 3 and subtract eq(2) from eq(1)
Putting value of x = -4 into eq(1)
So, value of x =-4 and value of y=-3
(-4,-3) is the solution of system of equations.
Keywords: system of equations.
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To solve this we need to form 2 equations with only 2 variables.
x+4y-5z=-7
2x+y+5z=8
3x+5y=1
15x+10y+15z=35
6x+3y+15z=24
9x+7y=11
Now we need to use these to find x and y
9x+15y=3
9x+7y=11
8y=-8
y=-1
Therefore:
x=2
From this we can find that:
2(2)-1+5z=8
Therefore z=1
The answer is x=2, y=-1, z=1
Answer:
12
Step-by-step explanation:
-2xy
Let x = -1 and y =6
-2 ( -1) (6)
Multiply
2 (6)
12
For Janna to prove that △ABC∼△DEF by the SSS similarity theorem, she will use: B. DE/AB = EF/BC = DF/AC = 1/4.
<h3>What is the SSS Similarity Theorem?</h3>
According to the SSS similarity theorem, if the ratio of the corresponding sides of two triangles are equal, then both triangles are similar.
The ratio of the corresponding sides of the triangles given are:
DE/AB = 4/16 = 1/4
EF/BC = 3.25/13 = 1/4
DF/AC = 1.75/7 = 1/4
Therefore, what Janna needs is:
B. DE/AB = EF/BC = DF/AC = 1/4
Learn more about the SSS similarity theorem on:
brainly.com/question/4163594
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Answer:
a) 22:24 simplified the answer is 11:12
b) 21:81 simplified the answer is 7:27
Step-by-step explanation:
not sure how you were taught but those could also be
a) 
or simplified the answer is 
b) 
or simplified the answer is 
