A two-dimensional shape has length and width. A three-dimensional solid shape also has depth. Three-dimensional shapes, by their nature, have an inside and an outside, separated by a surface. All physical items, things you can touch, are three-dimensional.
Answer:
D
Step-by-step explanation:
To find the discriminant you do b^2-4(a)(c), which in this case gives you -28. If your discriminant is less than zero, you will have no real roots.
(820*7)-(480*7)=? This is how to solve the equation
2/3!
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X=20
180=7x+x+20
-20. -20
180=7x+x
180=8x
divide by 8
x=20
