4 years ago

I'm not sure how to do these equations

1 answer:

5 0

$\frac{x^2+4x+3}{x^2-4x-21} = \frac{(x+3)(x+1)}{(x+3)(x-7)} = \frac{x+1}{x-7}$
$\frac{x^2+10x+16}{x^2+13x+40} = \frac{(x+8)(x+2)}{(x+8)(x+5)} = \frac{x+2}{x+5}$

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8) Tammy uses 1 3/4 cups of laundry detergent per load. When she was finished

mina [271]

Tammy uses 1 3/4 cups of laundry detergent. The number of loads is 4

Solution:

Given that, Tammy uses 1 3/4 cups of laundry detergent per load.

When she was finished doing laundry one day.

She noticed that she had used 7 cups of laundry detergent.

We have to find how many loads did she do?

Now, we know that, Total cups used can be written as:

number of loads x number of cups per each load = total cups used.

$\begin{array}{l}{\text { Then, number of loads } \times 1 \frac{3}{4}=7} \\\\ {\text { Number of loads } \times \frac{1 \times 4+3}{4}=7} \\\\ {\text { Number of loads } \times \frac{7}{4}=7} \\\\ {\text { Number of loads }=7 \times \frac{4}{7}=4}\end{array}$