Well i kinda realllyyy don't get equivalent expressions.. like.. 30d^2+15=7 ^^^93h^2 +6=? or like something like this . 121-33m^3=? Help?;/

Sure! I can help you understand equivalent expressions. Equivalent expressions are those that have the same value when you substitute any number into the variables. They may look different but will give you the same result.

Let's take the first example: 30d^2 + 15 = 7.

To find the value of d, we need to isolate the variable on one side of the equation. We'll start by subtracting 15 from both sides:

30d^2 + 15 - 15 = 7 - 15

This simplifies to:

30d^2 = -8

Now, we will divide both sides of the equation by 30 to solve for d^2:

30d^2 / 30 = -8 / 30

This gives us:

d^2 = -8/30 or -4/15

To simplify further, we can reduce the fraction -8/30 and write it as -4/15. So, the equivalent expression for 30d^2 + 15 = 7 would be d^2 = -4/15.

Similarly, let's look at the second example: 93h^2 + 6.

Since there is no equal sign in this expression, we cannot directly find a specific value for it. It remains an algebraic expression. However, if you were given a value for h, you could substitute it into the expression to find the result.

Next, let's consider the third example: 121 - 33m^3.

To find the value of m, we'll start by subtracting 121 from both sides:

121 - 33m^3 - 121 = 0 - 121

This simplifies to:

-33m^3 = -121

Now we will divide both sides by -33 to solve for m^3:

-33m^3 / -33 = -121 / -33

This gives us:

m^3 = 121/33 or 11/3

Therefore, the equivalent expression for 121 - 33m^3 is m^3 = 11/3.

I hope this helps! Let me know if there's anything else I can assist you with.