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3 years ago

Write an equation and then solve for x

Mathematics

2 answers:

mezya [45]3 years ago

7 0

Answer:

11x-63=(5x-11)+(2x+20)

x=18

Step-by-step explanation:

external angle Theorem: The external angle is equal the sum of the two other internal angles.

Then we have this equation:

11x-63=(5x-11)+(2x+20)

Solving this:

11x=63+7x+9

4x=72

x=18

Nata [24]3 years ago

4 0

Answer:

(5x-11)+(11x-63)+(2x+20)

Step-by-step explanation:

If you have to solve for it then just add all your like terms into a simplified equation. 18x-54 would be the simplified version

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Ray Of Light [21]

Answer:

A = 28.26

Step-by-step explanation:

Area = 3.14r^2

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Area = 3.14(9)

Area = 28.26

8 0

3 years ago

Need help in algebra quick Anything helps

ladessa [460]

Answer:

D. f(x) = 2x - 8

Step-by-step explanation:

What you do is you take the x number and but it into the x spot.

f(x) = 2x Put 5 into the x

2(5) = 10 does not equal 2.

f(x) = x -3 Put 5 into the x

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4 years ago

HELP!

mestny [16]

Answers:

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5 0

3 years ago

Julie went to the store with $20.00. if she bought 8 cans of dog food for $.67 per can, how much money did she have left? IF YOU

Georgia [21]

Answer:

$14.64

Multiply 8 by .67 which is 5.36

Subtract 5.36 from 20.00 and that's 14.64

6 0

4 years ago

Read 2 more answers

What is

disa [49]

<h3>Explanation:</h3>

There is a theorem :

$\mathbf{a^{2}-b^{2}=(a-b)(a+b)}$

Proof: open the brackets on right side of equality by using distributive property

RHS = a(a+b) - b(a+b)

RHS = $\mathrm{a^{2}+ab-ab-b^{2}}$

RHS = $\mathrm{a^{2}-b^{2}}$ = LHS

Using the above theorem you can solve every question you asked:

$\mathrm{4x^{2}-1=(2x)^{2}-1^{2}=(2x-1)(2x+1)}$
$\mathrm{9x^{2}-64=(3x)^{2}-(8)^{2}=(3x-8)(3x+8)}$

$\mathrm{49x^{2}-121=(7x)^{2}-(11)^{2}=(7x-11)(7x+11)}$

$\mathrm{4x^{2}-y^{2}=(2x)^{2}-y^{2}=(2x-y)(2x+y)}$

$\mathrm{9x^{2}-b^{2}=(3x)^{2}-b^{2}=(3x-b)(3x+b)}$

$\mathrm{16x^{2}-9b^{2}=(4x)^{2}-(3b)^{2}=(4x-3b)(4x+3b)}$

$\mathrm{x^{2}-42^{2}=(x-42)(x+42)}$

6 0

4 years ago