Al washed a car in 6 minutes. Fred washes the same car in 8 min. How long dies it take Al and Fred to wash the car together?

1 answer:

3 0

$In\ 1min\ Al\ wash\ \frac{1}{6}\ car.\\In\ 1min\ Fred\ wash\ \frac{1}{8}\ car\\\\Together\ in\ 1min:\frac{1}{6}+\frac{1}{8}=\frac{4}{24}+\frac{3}{24}=\frac{7}{24}\ car\\\\Answer:Al\ and\ Fred\ wash\ the\ car\ in\ \frac{24}{7}min=3\frac{3}{7}min\approx3.5min$

You might be interested in

Find the area of a composite shape below:

yuradex [85]

Answer:

To find the area of a composite figure, separate the figure into simpler shapes whose area can be found. Then add the areas together. Be sure than none of the simpler figures have overlapping areas. Example 1: Find the area of the composite shape shown below.

Step-by-step explanation:

7 0

3 years ago

Solve each equation? (n+2) ( n+1)= 0

Delicious77 [7]

Answer:

$n=-2,\:n=-1$

Step-by-step explanation:

$\left(n+2\right)\left(n+1\right)=0\\\mathrm{Using\:the\:Zero\:Factor\:Principle:\quad \:If}\:ab=0\:\mathrm{then}\:a=0\:\mathrm{or}\:b=0\:\left(\mathrm{or\:both}\:a=0\:\mathrm{and}\:b=0\right)\\\mathrm{Solve\:}\:n+2=0:\quad n=-2\\n+2=0\\\mathrm{Subtract\:}2\mathrm{\:from\:both\:sides}\\n+2-2=0-2\\\mathrm{Simplify}\\n=-2\\\mathrm{Solve\:}\:n+1=0:\quad n=-1\\n+1=0\\\mathrm{Subtract\:}1\mathrm{\:from\:both\:sides}\\n+1-1=0-1\\Simplify\\n=-1\\$ $\mathrm{The\:solutions\:to\:the\:quadratic\:equation\:are:}\\n=-2,\:n=-1$