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Serga [27]
2 years ago
12

HELP ME PLEASE REAL ANSWERS ONLY

Mathematics
1 answer:
asambeis [7]2 years ago
8 0

Answer: x=4, x=-5

Step-by-step explanation:

\frac{x}{x-4}-\frac{4}{x+5}=\frac{36}{x^2+x-20}

Multiply everything by the LCM = (x-4)(x+5):

\frac{x}{x-4}\left(x-4\right)\left(x+5\right)-\frac{4}{x+5}\left(x-4\right)\left(x+5\right)=\frac{36}{x^2+x-20}\left(x-4\right)\left(x+5\right)

\frac{x\left(x-4\right)\left(x+5\right)}{x-4} -\frac{4\left(x-4\right)\left(x+5\right)}{x+5} =\frac{36\left(x-4\right)\left(x+5\right)}{\left(x-4\right)\left(x+5\right)}

Simplify by cancelling out same terms: in the numerators and denominators:

x\left(x+5\right)-4\left(x-4\right)=36

x^2+x-20=0

(x+5)(x-4) = 0

The solution to the quadratic equation is x=4, x=-5

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Simplify the expression: (5 - 4i) (6 - 2i).
Andreyy89

Answer:

22 - 34i

Step-by-step explanation:

note that i² = - 1

Given

(5 - 4i)(6 - 2i) ← expand factors using FOIL

= 30 - 10i - 24i + 8i²

= 30 - 10i - 24i - 8 ← collect like terms

22 - 34i

8 0
3 years ago
Combine like terms.
stealth61 [152]
D. 7+13t

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4 years ago
There are 30 colored marbles inside a bag. Six marbles are yellow, 9 are red, 7 are white, and 8 re blue, One is drawn at random
Ratling [72]

Answer:

Red

Step-by-step explanation:

Of the specific numbers of each color, red has the most marbles, so mathematically speaking, red has the highest chance of being chosen first

Hope this helps!

6 0
3 years ago
Read 2 more answers
Please help 10 points
jeka57 [31]

Answer:

61°

Step-by-step explanation:

Alright so the total amount of degrees in a 5-sided shape or pentagon is 540°. Since we have four of the five total angles, we can solve for the last one.

Sum of all the degrees of all five angles = 540°

The variable x is representing our last unknown degree.

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Add up all the known degrees and solve for x.

479° + x° = 540°

Subtract 479 on both sides so that we can isolate x.

479° + x° - 479° = 540° - 479°

x° = 61°

So our final answer is 61°

4 0
4 years ago
You are starting your own small business in Woodmore Town Center. You borrow $10,000 from the bank at a 9% rate for 5 years.
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Follow the formula Interest=(Principal)(Rate)(Time)

So, the equation would be:

I= 10,000x0.09x5

This equals $4,500

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