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Arturiano [62]
3 years ago
8

Find the values of the variables

Mathematics
1 answer:
egoroff_w [7]3 years ago
4 0

Answer:

x=20degree and y=10degree

Step-by-step explanation:

5x+4x=180

=9x=180

=x=20

and

11x+7y=180

=18y=180

=y=10

plz give me brainlist

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How would the expression x^2-4 be rewritten using Difference of Squares?
Anna [14]
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This is the 'Difference of Squares' formula we can use to factor the expression.

In order to use the </span><span>'Difference of Squares' formula to factor a binomial, the binomial must contain two perfect squares that are separated by a subtraction symbol.

</span><span>x^2 - 4 fits this, because x^2 and 4 are both perfect squares, and they are separated by a subtraction symbol.
All you do here to factor, is take the square root of each term.

√x^2 = x
√4 = 2

Now that we have our square roots, x and 2, we substitute these numbers into the form (a + b)(a - b).
</span>
<span>(a + b)(a - b)
(x + 2)(x - 2)

Our answer is final </span><span>(x + 2)(x - 2), which can also be written as (x - 2)(x + 2), it doesn't make a difference which order you put it in.

Anyway, Hope this helps!!
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3 0
3 years ago
Solve this step by step using the quadratic function <br> y=x^2 +x+2
Ne4ueva [31]

Answer:

x=<u>+</u>\frac{\sqrt{4y-7}-1 }{2}

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x=-1<u>+</u>\sqrt{1^2-4(2-y)} /2

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Pretty sure this is right. Would appreciate a brainliest

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She needs 40 inches total. Hope it helps!
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3 years ago
We now want to solve for x.
mart [117]
-4x=-12

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I’m pretty sure that is correct
7 0
3 years ago
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