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-Dominant- [34]
3 years ago
12

10a+5.50c=31 What are the steps to solve this

Mathematics
1 answer:
GaryK [48]3 years ago
6 0

Step-by-step explanation:

There are 2 variables a and c, and there is only 1 equation. Hence we cannot find both variables.

However if we restrict a and c to be positive integers, we will have:

10a + 5.5c = 31

=> 20a + 11c = 62

Since 62 ≡ 2(mod 20) and 11c <= 62,

we have c = 2.

=> 20a + 11(2) = 62, 20a = 40, a = 2.

Therefore a = 2 and c = 2.

Hopefully this explanation helped!

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X^3-3x^2+81x-243
hram777 [196]
The given <span>polynomial is ⇒⇒⇒  </span><span>f(x) = x³ - 3x² + 81x - 243
</span>
by factoring the absolute term (243) to find one of the factors of the the polynomial
∴ 243 = (1 * 243) or (3 * 81) or  (9 * 27)
check which of the numbers {1 , 3 , 9 , 27 , 81 , 243} make f(x)<span>= 0
</span>
i have checked 3 and it makes <span>polynomial = 0
</span>
i.e:  f(3) = 0  ⇒⇒ (x - 3) is one of the factors of f(x)
By using the reminder theorem ⇒⇒ see the attache figure

∴ \frac{f(x)}{x-3} =  x^{2} +81
And ⇒⇒ (x² + 81)  is a sum of two squares which can be factored using the complex numbers as following
x² + 81 = ( x + 9i ) ( x - 9i )

∴ f(x) = <span>x³ - 3x² + 81x - 243 = (x - 3)(x + 9i)(x - 9i)
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3 0
3 years ago
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Am I correct? I really need help
xeze [42]
The correct answer is A
3 0
4 years ago
Pls will give brainiest
Ber [7]

Answer:

The answer is D

Step-by-step explanation:

The person who saked this question will find this useless but this is for all the other ppl to come here for the answer

5 0
3 years ago
3(x+4)=16 solve for x
MAXImum [283]
Hope you get it
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6 0
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The sales tax in your city is 8.8% and an item costs $63 before tax.
Art [367]

Answer:

If you are trying to figure out the total cost, then I believe it would be 68.544$ (68.54$ rounded).

Step-by-step explanation:

This is true because,

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63$ + 5.544$ = 68.544$

I am not quite sure if it is all correct, but I hope this helps! :)

6 0
3 years ago
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