3 years ago

SOME ONE HELP ME PLEASE...HURRY...I SUCK AT MATH..PLEASE HELP ME

Mathematics

1 answer:

Bond [772]3 years ago

3 0

A. (21+9)/2 * 10
= 150 sqrd ft

b. 150*4.50= $675

c. same thing as 15*12= 180

d. 180*6=$1080

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with the pythagorean theorem

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using the formula of the quadratic equation

$\begin{gathered} x_{1,\: 2}=\frac{-b\pm\sqrt{b^2-4ac}}{2a} \\ x1=\frac{-6+\sqrt{6^2-4\left(-1\right)\cdot\:7}}{2\left(-1\right)}=-1 \\ x2=\frac{-6-\sqrt{6^2-4\left(-1\right)\cdot\:7}}{2\left(-1\right)}=7 \end{gathered}$

the length cannot be negative, therefore x=7

length of the shorter leg is: 7ft

length of the longer leg is: 3+3(7)= 24ft

length of the hypotenuse is: 4+3(7)= 25ft