Equations

The area of a rhombus is given by the formula $A=\frac{1}{2}xy$`A`=12`x``y`, where $x$`x` and $y$`y` are the lengths of the diagonals.

If the diagonals of a rhombus have lengths of $2$2 cm and $4$4 cm, find the area of the rhombus.

Easy

Less than a minute

The value of a variable $T$`T` is defined by the formula $T=a+\left(n-1\right)d$`T`=`a`+(`n`−1)`d`.

Given that $a=6$`a`=6, $n=5$`n`=5 and $d=8$`d`=8, find the value of $T$`T`.

Sally bought a television series online. The television series was $7.2$7.2 gigabytes large and took $2$2 hours to download.

Conversion from Fahrenheit to Celsius is defined by the formula $C=\frac{5}{9}\left(F-32\right)$`C`=59(`F`−32).

The temperature inside a freezer is $86^\circ$86°$F$`F`. What is this temperature in Celsius?

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Determine the value of a variable in the first degree, using a formula