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MaRussiya [10]
3 years ago
8

PLEASE HELP IM CHECKING MY ANSWERSSS!!!

Mathematics
1 answer:
Softa [21]3 years ago
3 0
The answer u have is correct
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Trevor solved the system of equations below. What mistake did he make in his work? 2x + y = 5 x − 2y = 10 y = 5 − 2x x − 2(5 − 2
Arturiano [62]
2x+y=5 \\
x-2y=10 \\ \\
y=5-2x \\
x-2(5-2x)=10 \\
x-10+4x=10 \\
5x-10=10 \\
\boxed{5x=0} \Leftarrow \hbox{the mistake, it should be 5x=20} \\
x=0 \\ \\
2(0)+y=5 \\
y=5

If 2x+y=5, then y=5-2x, so he substituted 5-2x correctly.
x+4x=5x, so he combined like terms correctly.
If 5x-10=10, then 5x=10+10 -> 5x=20, so he subtracted 10 from the right side instead of adding 10 to the right side.

The answer is C.

Here's the correct solution:
2x+y=5 \\
x-2y=10 \\ \\
y=5-2x \\
x-2(5-2x)=10 \\
x-10+4x=10 \\
5x-10=10 \\
5x=10+10 \\
5x=20 \\
x=\frac{20}{5} \\
x=4 \\ \\
y=5-2x \\
y=5 - 2 \times 4 \\
y=5-8 \\
y=-3 \\ \\
(x,y)=(4,-3)
5 0
3 years ago
If I’m asked to simplify an expression does that mean I shorten it or solve it?
DochEvi [55]

Answer:

Solve it

Step-by-step explanation:

When you're asked to simplify an expression it means to solve it.

4 0
3 years ago
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Describe the transformation f(x) = 2x + 1 -> g(x) = -8(x + 4) - 1
katrin2010 [14]

f(x) = 2x + 1; Paren graph = x;

The graph was shifted one unit up and stretched 2 times.

g(x) = -8(x+4) - 1 = -8x - 32 - 1 = -8x - 33

The graph was shifted 33 units down and stretched 8 times and flipped 180 degrees.

8 0
3 years ago
What is the greatest common factor of 128 and 96
aalyn [17]
The greatest common factor is 32

6 0
3 years ago
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Hii!! I'm struggling a little on this, could someone help me with both the questions? thanks!! (how do i give brainliest help il
romanna [79]

Look AT IMAGE

Step-by-step explanation:

8 0
3 years ago
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