Answer:
(4-9)+2=5
Step-by-step explanation:
hope it's it's right
4.49 x 10^1 is 44.9 in scientific notation
1) (m-n)(m+n)
= m^2 +mn-nm-n^2
= m^2-n^2
2) (z-3)(z+3)
= z^2+3z-3z-9
= z^2-9
Answer:
1.98
Step-by-step explanation:
In this problem, we are:
Given: ∠D = 26°, Hypotenuse (DF) = 4.5
To solve: EF
Now through the given, we are to focus on point D to solve for EF.
We need to find the relationship of point D to DF and EF.
The relationship here is sine.
Reason:
Through point D, DF is the hypotenuse and EF is the opposite side.
So let's solve this simply through algebra,
sin =
sin(26°) =
0.44 =
0.44 × 4.5 = EF
1.98 = EF