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antoniya [11.8K]
3 years ago
9

A(n) ______ is a letter or symbol that represents some unknown value.

Mathematics
1 answer:
Nuetrik [128]3 years ago
4 0
The answer is "variable"

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Find x, if 3x − 5(y + x ) ^2 = 16 and 4x + 2(y + x )^ 2 = 30
lana66690 [7]

Answer:

x = 7

Step-by-step explanation:

Start by solving for (y+x)^2 which is a common expression for both equations. Then in the first equation:

3\,x5\,(y+x)^2=16\\3x-16=5\,(y+x)^2\\(y+x)^2=\frac{3\,x-16}{5}

and in the second equation:

4\,x+2\,(y+x)^2=30\\2\,(y+x)^2=30-4\,x\\(y+x)^2=15-2\,x

Now we make the two (y+x)^2 expressions equal so we get:

\frac{3\,x-16}{5} =15-2\,x\\3\,x-16=75-10\,x\\13\,x=75+16\\13\,x=91\\x=7

8 0
3 years ago
Express 3a2b-1 with positive exponents.
serg [7]

Answer:

a = 2b/3−1/3

Step-by-step explanation:

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8 0
3 years ago
Write the equation of the line that passes through
Tom [10]

Answer:

y=63x+65

Step-by-step explanation:

7 0
2 years ago
What will be the cost price of a television when
astra-53 [7]
3+3+4+3+-3+4-66+44+3=34x
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2 years ago
Similar:<br> Similarity Statement:<br> Scale Factor:<br> Please help, NO LINKS
nalin [4]

Answer:

No similarity and no scale factor (I could be wrong)

Step-by-step explanation:

Don't worry, no links :)

You would see if they are similar if they have similar sides. so if there is an equal ratio, to both, they are similar. Sometimes they may not look similar until you rotate them. So for the following, you can see that if E were on the bottom, it would look like the triangle with N and M on the bottom you can ensure this to look at the ratios of each side. To find the scale factor, it depends on which way you are going. are you going from GEF to MNL or MNL to GEF? To me, it doesn't look like there is a scale factor, but I could be wrong.

8 0
3 years ago
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