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Maru [420]
3 years ago
13

I don’t understand this one

Mathematics
1 answer:
Masja [62]3 years ago
5 0

Answer:

  see below

Step-by-step explanation:

Put -1 where x is in each expression and evaluate it.

__

You will find that the expression is zero when the numerator is zero. And you will find the numerator is zero when it has a factor that is equivalent to ...

  (x +1)

Substituting x=-1 into this factor makes it be ...

  (-1 +1) = 0

__

Evaluating the first expression, we have ...

\dfrac{4(x+1)}{(4x+5)}=\dfrac{4(-1+1)}{4(-1)+5}=\dfrac{4\cdot 0}{1}=0

This first expression is one you want to "check."

You can see that the reason the expression is zero is that x+1 has a sum of zero. You can look for that same sum in the other expressions. (The tricky one is the one with the factor (x -(-1)). You know, of course, that -(-1) = +1.)

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Answer:

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Step-by-step explanation:

3 0
3 years ago
A farmer sells 9.9 kilograms of pears and apples at the farmer's market. of this weight is
ivanzaharov [21]

The given question is incomplete. The complete question is:

A farmer sells 9.9 kg of pears and apples at the farmers market. 3/4 of this weight is pears,and the rest is apples.how many kilograms of apples did she sell at the farmers market.

Answer: The farmer sells 2.475 kg of apples.

Step-by-step explanation:

Given : Total weight of pears and apples = 9.9 Kg

\frac{3}{4} of the total weight is pears

Hence, weight of pears = \frac{3}{4}\times 9.9=7.425 Kg

Therefore weight of apples = Total weight - weight of pears = (9.9 -7.425) = 2.475 Kg  

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3 years ago
Suppose that for a very large shipment of integrated-circuit chips, the probability of failure for an one chip is 0.20. Assuming
SVETLANKA909090 [29]

Answer:wrfeewdfwesd

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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prohojiy [21]

Answer:

=14m^4+2m^2+6m

Step-by-step explanation:

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7 0
3 years ago
The diameter of a round skating
Tema [17]

Answer: 47 meters

Step-by-step explanation:

The equation for the diameter of a circle is C=d\pi, so we just multiply the diameter (15) by \pi. 15\pi, or roughly 47.1238898038. Rounded to the nearest meter, 47 meters. Also, happy pi day!

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