3 years ago

Hi can any one please help me I really need help please please let me know ya

1 answer:

5 0

A. V= l x b x h
= 5cm x 4cm x 10cm
= 200 squared centimetres

C. V= S squared x h divided by 3
= 15cm x 17cm divided by 3
= 85 squared centimetres

D. V= b x h x l divided by 2
= 8cm x 10cm x 13cm divided by 2
= 520 cubed centimetres

Well am not sure about the other two but I hope this helps ya

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What quadratic formula do I need to use to solve 3x(x+6)=-1

timofeeve [1]

Answer:

$\Large \boxed{x_1=\frac{9+\sqrt{51} }{3} \ \ ; \ \ x_2=\frac{9-\sqrt{51} }{3} }$

Step-by-step explanation:

$\displaystyle \Large \boldsymbol{} 3x(x+6)=-10 \\\\3x^2+18x=-10 \\\\3x^2+18x+10=0 \\\\D=324-120=204 \\\\ x_{1;2}=\frac{18\pm2\sqrt{51} }{6} =\frac{9\pm\sqrt{51} }{3}$