3 years ago

How old am I if 300 reduced by 3 times my age is 39?

Mathematics

1 answer:

Tanzania [10]3 years ago

6 0

Let your age represent X

300-3x=39

x= 87

you are 87 years old

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Xin Used 20 yards of fencing to build the walls of a square a chicken coop. Used 20 yards of fencing to build the walls of a squ

Gnoma [55]

Answer:

Equation: $20=4x$ or $x=\frac{20}{4}$

Solution: $x=5$

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The formula that is used to calculate the perimeter of a square is:

$P=4s$

Where "s" is the side lenght the square.

Knowing that Xin used 20 yards of fencing to build the walls of a square chicken coop (in which the lenght in yards of each wall is represented with "x"), you can identify that:

$P=20\\\\s=x$

Then, you can susbtitute values into the formula $P=4s$ :

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Finally, you must solve for "x" in order to find its value.

This is:

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