Which set of expressions are not equivalent?

4x (x) + 3 (2x) and 4x2 + 6x

5 (3x) - 4 (3x) and 3x

4 (3a) - 2 (4a) and 4a2

3 (3a) + a (3a) and 3a2 + 9a

Two-fifths of the fish in Gary's fish tank are guppies. One fourth of the guppies are red. What fraction of the fish in Gary's tank are red uppies? what fraction of the fish in gary's are not red guppies?

The tartness of a lemon (which depends on the concentration of citric acid)

Express twenty-nine thousandths as a fraction

Definition of coefficient

How to divide 3072 divided by 32

A rectangle has length (4x+ 5) and breadth 3x. Find the area of the rectangle.

A pattern has 1,000 identical circles. If 665 of the circles are orange, what decimal represents the part of the pattern that is orange? Why? A. 665 B. 66.5 C. 6.65 D. 0.665

3.) What is h (5) ? What does this mean?

I was wondering how to find these things about the Singapore flyer (ferries wheel) ? The measure of the central angle in degrees, the measure of the central angle in radian, the arc length between two cars, and the area of a sector between two cars?

What is Charlotte has 12 T-shirts one fourth of her two shirts are green how many of charlottes T-shirts are green?