We know that the sum is 30
that means that jody's older brother is 3 years less than twice jodys age.
Lets try all the answers
7*2= 14-3=11 Nope
11*2=22-3=19+11=30 YUP!
19*2=35-3=32 Nope
23*2=46-3=43 Nope
Your answer is b

Since the denominator is a monomial, we divide each term of the trinomial in the numerator by the denominator.

, because 3/-3 = 1 and x³/x = x².

; 9/-3 = -3 and x²/x = x.

; -6/-3 = 2 and x/x = 1, so we have 2*1 = 2.
Together this gives us
Answer:

Step-by-step explanation:
For this, you check to see if any of these variables are the same. There are two x's, and 2 y's. So, you have to multiply x and x, which gives you 2x, and since you multiply the y's it will give you y^2.
So the answer will be 
The values of sin (x/2) = 4/√17, cos (x/2) = 1/√17 and tan (x/2) = 4.
<h3>What is Trigonometry?</h3>
Trigonometric ratios are the ratios of the length of sides of a triangle. These ratios in trigonometry relate the ratio of sides of a right triangle to the respective angle.
Here, cos x = -15/17 (given)
we know, cos x = 2cos²x/2 - 1
cos²(x/2) = (cos x + 1)/2
cos²(x/2) = (-15/17 + 1)/2
cos²(x/2) = 1/17
cos (x/2) = 1/√17
then, sin (x/2) = √(1- cos²(x/2))
sin (x/2) = √(1 - 1/17)
sin (x/2) = √16/17
sin (x/2) = 4/√17
and tan (x/2) = sin (x/2) / cos (x/2)
tan (x/2) = 
tan (x/2) = 4
Thus, the values of sin (x/2) = 4/√17, cos (x/2) = 1/√17 and tan (x/2) = 4.
Learn more about Trigonometry from:
brainly.com/question/22698523
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Answer:
$15 is 37.5% of $40.
Step-by-step explanation: