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3 years ago

5

PlEASE ANSWER! x/3 - 4 = 5

2 answers:

Digiron [165]3 years ago

8 0

First of all, x/3 means to divide.

To solve, you need to add 4 and 5 together to find what you need to subtract from 4 to get 5. The answer is 9.

You then multiply 9 by 3 to find x since you have to divide 3 by x to make the problem true.

You get 27 as x since 27 divided by 3 is 9 and 9 minus 4 is 5 so that all works out.

pshichka [43]3 years ago

6 0

3 because 5- 4 is 1 and 3/3=1

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p -<span> the programming time
</span>c - time spent on commercials

<span>A radio station broadcasts programs and commercials 20 hours everyday:
p + c = 20

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3 years ago

Find the value of c so that (x-5) is a factor of the polynomial p(x)

liubo4ka [24]

I think the question is

Find the value of c so that (x-5) is a factor of the polynomial

$p(x) = x^3 + 2x^2 + cx + 10$

The other factor is going to be some quadratic. We can say a few things about its coefficients but let's start by saying in general it's

$q(x)= ax^2 + bx + k$

$p(x) = (x-5)q(x)$

$x^3 + 2x^2 + cx + 10 = (x-5)(ax^2 + bx+k) = ax^3 + (b-5a)x^2 + (k-5b)x - 5k$

Equating respective coefficients,

$a=1$

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so we get

$b = 2 + 5 = 7$

$k = 10/-5 = -2$

$c = k - 5b = 2 - 5(7)= -37$

Answer: -37

Check:

$(x^2 + 7x - 2)(x - 5) = x^3 + 2 x^2 - 37 x + 10\quad\checkmark$

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jasenka [17]

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