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3 years ago

9

Please help for 18 n 19

1 answer:

Hitman42 [59]3 years ago

7 0

$18. \ \ \frac{-1}{x-9}- \frac{-2}{x+7}= \frac{-1(x+7)+2(x-9)}{(x-9)(x+7)}= \frac{-x-7+2x-18}{(x-9)(x+7)}= \frac{x-25}{(x-9)(x+7)}$

$\frac{2}{x}+ \frac{12}{x}=7 \\ \\ \frac{14}{x} =7 \\ \\ x= \frac{14}{7} \\ \\ x=2$

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10) Explain how the domain of an expression can affect the solution to a sentence.

Novay_Z [31]

Answer:

The domain of a function is the set of all "input" or argument values for which the function is defined. This means the function provides an "output" or value for each member of the domain. Meaning a domain/input relates directly to an output.

Hope this helped :)

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4 years ago

1 cm (map)= 5 km (actual)

Stella [2.4K]

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3 years ago

Whiskers the cat weighs 2 and 2 over 3 kg.piglio weighs 4 kg. How many times as heavy as piglio is whiskers

ruslelena [56]

Answer:

Whiskers is two-third times as heavy as piglio is.

Step-by-step explanation:

Given:

Weight of whiskers is, $W=2\frac{2}{3}\ kg$

Weight of piglio is, $P=4\ kg$

In order to compare their weights, we have to divide both the weights and then express one weight in terms of the other.

Therefore, dividing whiskers weight by piglio's weight, we get:

$\frac{W}{P}=2\frac{2}{3}\div 4\\\frac{W}{P}=\frac{8}{3}\div \frac{4}{1}(\textrm{4 can be rewritten as 4/1 in fraction form})$

Now, when we divide two fractions, we replace the division sign by multiplication and reverse the second fraction. This gives,

$\frac{W}{P}=\frac{8}{3}\times \frac{1}{4}\\\frac{W}{P}=\frac{8\times 1}{3\times 4}\\\frac{W}{P}=\frac{2}{3}$

Now, expressing 'W' in terms of 'P', we multiply both sides by 'P. This gives,

$W=\frac{2}{3}P$

Therefore, the weight of whiskers is two-third times as heavy as piglio is.

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3 years ago

Find the simple interest earned on $2,500 at 6% for 2 years.

Elina [12.6K]

Answer:

$2800

Step-by-step explanation:

6/100 x 2500 = 150

150 x 2 = 300

2500 + 300 = $2800

<em>Feel free to mark it as branliest :D</em>

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3 years ago

a mural will be painted on a wall that is 63.5 inches high and 7 yards long. The wall also has two windows that are 2.5 square f

nydimaria [60]

So the answer might be 61.0 because if you subtract (-)63.5 with 2.5 it would 61.0 so i dont know ..but good luck and if i fail you im so sorry

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4 years ago