Solve the equation using inverse operations.check your solutions.

1 answer:

3 0

There is equation to solve.However I can give an example using inverse operations and then I will the solution.

28 = 7×
Find the value of x

The opposite operation of multiplication is division.Therefore I can divide 28÷ 7 and 7÷7
.You would cancel out the 7 so you would have x equals to 4.

To check my solution,I would substitute the x by 4 and rewrite the problem as 7 (4) and that is equivalent to 28.So the answer is x=4.

Hope this helps. =)

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3. Solve for x. Round to the nearest tenth. 14 х 49°

Elis [28]

So for this triangle you are going to use Cos, which is adjacent/hypotenuse.
In this case x is your hypotenuse.

So your equation is going to be Cos(49)= 14/x.
So in order to get x, you are going to have to multiply x by each side. So:

x • Cos(49)= 14/x • x.
Multiplying x and x is going to cancel each other out so your new equation is going to be:

xCos(49)=14.

Now we are going to divide each side by Cos(49). Dividing Cos(49) by itself, will cancel itself out, so then your new equation will be:

x = 14/Cos(49)

Now you are going to put that into your calculator and your answer will be

x = 9.18.

If i’m wrong please tell me and correct me.
Here is a photo of you don’t understand.