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Pavlova-9 [17]
3 years ago
12

I really need help If AD = 12 and AC = 4y-36, find the value of y

Mathematics
1 answer:
Mice21 [21]3 years ago
8 0
Notice the tickmarks

AD = DC

now AC, which is the whole length from side to side,
is 4y-36
AD is 12, and since DC is the same as AD, so
DC = 12

AC = AD + DC, or 12 + 12
now, we know AC is also 4y-36

so \bf \begin{array}{cccccclllllll}
AC&=&AD&+&DC\\
\downarrow &=&\downarrow &&\downarrow \\
4y-36&=&12&+&12\\

\\ \quad \\ \quad \\
4y-36&=&&24

\end{array}

solve for "y"

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