What is - 4/5 times -5/7?
20/35 or in simplified form 4/7
The answer is 65%
You can find it by dividing 39 by 60 and you get .65 then multiply by 10 and you get 65!
Hope this helped and pls mark as brainliest!
~ Luna
Example: <span>the second step in the process for factoring the trinomial x^2-3x-40 is to:</span> <span>Well you really should find the sum of the factors of −40 (not 40) </span>
<span>But before you can do that, you need to LIST the factors of −40 (not 40) </span>
<span>−1 * 40 </span>
<span>−2 * 20 </span>
<span>−4 * 10 </span>
<span>−5 * 8 </span>
<span>−8 * 5 </span>
<span>−10 * 4 </span>
<span>−20 * 2 </span>
<span>−40 * 1 </span>
<span>NOW we find the sum of the factors of −40 </span>
<span>−1 + 40 = 39 </span>
<span>−2 + 20 = 18 </span>
<span>−4 + 10 = 6 </span>
<span>−5 + 8 = 3 </span>
<span>−8 + 5 = −3 </span>
<span>−10 + 4 = −6 </span>
<span>−20 + 2 = −18 </span>
<span>−40 + 1 = −39 </span>
<span>Then we choose the factors of −40 whose sum is −3 ---> −8 and 5 </span>
<span>x^2 − 3x − 40 = (x − 8) (x + 5) </span>
<span>So FIRST step is B, SECOND step is C, and final step is factoring. </span>
What Rita did was combine these 2 steps together, which you will learn to do as you get better at factoring.
You need the Law of Cosines here and you use it when you have 2 sides and an enclosed angle. The side across from the angle is the one we are looking for. The correct way to express the Law using what we have is the last choice above. Side RT is the unknown, and it is across from the angle that is enclosed between the 2 other sides.
Answer:
Step-by-step explanation:
step 1
Find the 
we know that
Applying the trigonometric identity
we have
substitute
Remember that
π≤θ≤3π/2
so
Angle θ belong to the III Quadrant
That means ----> The sin(θ) is negative
step 2
Find the sec(β)
Applying the trigonometric identity
we have
substitute
we know
0≤β≤π/2 ----> II Quadrant
so
sec(β), sin(β) and cos(β) are positive
Remember that
therefore
step 3
Find the sin(β)
we know that
we have
substitute
therefore
step 4
Find sin(θ+β)
we know that
so
In this problem
we have
substitute the given values in the formula
