(X+5)^2 = x^2 +10x + 25
the expression that is equivalent to
To multiply it we apply FOIL method
Multiply x with x+5 first and then we multiply 5 with x+5
From two to three there are 8 gaps and it is up to 7 so
Third answer 2 7/8
Answer:
Step-by-step Explanation:
Angle of depression is congruent to angle of elevation.
Therefore, angle of elevation of the given figure, which is opposite to x is 25°.
Adjacent length = 11 yd
Opposite length = x
Trigonometric ratio formula for finding x is shown below:
Multiply both sides by 11 to solve for x
(to the nearest tenth)
A reciprocal is when you flip the numerator and denominator.
Opposite just means multiplying the fraction by -1.
The answer here has to do with order of operations rules (PEMDAS).
–2^4 comes out to -16, because the exponentiation MUST be done first. That gives you 16, which you then preface with the - symbol.
(–2)^4 Here the parentheses make the difference: (-2)^4 requires that we take the 4th power of (-1) and mult. that by the 4th power of 2, which is 16.
So, yes, –2^4 and (–2)^4 are different.
What about –2^3 and (–2)^3?
Again we must do exponentiation first. 2^3 is 8, which we then preface with -. Result: -8. (–2)^3 is equivalent to (1)^3 * 2^3, or (-1)*8, or -8. So these two results are identical.
Perhaps it would help to recall that
-1 = -1
(-1)^2 = 1
(-1)^3 = -1
(-4)^4 = 1
and that this pattern repeats itself after you've written each group of 4 lines.
