Answer:
which equation?? you need to put more information..
For this kind of exercise you need to know the trigonometric identities.
In this case:
--->sin(2a)=2(sen(a)*cos(a))
(That comes from sin(a+b)=sin(a)*cos(b)+cos(a)*sin(b), since 2a is just a sum a a+a)
--->sin^2(a)+cos^2(a)=1
That way you can start transforming things and simplifying.
By doing that I got to: 2sin(x)*cos^2(x) (or 2sin(x)-2sin^3(x))
I attached the steps I followed as an image (I made a mistake on paper at the very end, that's a multiplication not a substraction, it's 2sin(x)*cos^2(x))
Answer:
35 2/3
Step-by-step explanation:
15 ÷ 3 is 5
5 × 7 is 35
35 ⅔
Remember parentheses, exponents, multiplication and division, addition and subtraction!
1 video game = 4.75
1 movie = x
4.75 + 3x = 11.50
-4.75 -4.75
______________
3x = 6.75
(3x = 6.75) ÷ 3
x = 2.25
Jessica paid $2.25 for each movie she rented.
Answer:
The youngest age John's cousin can be is 48 years
Step-by-step explanation:
The complete question is
John is 15 years older than her cousin. The sum of their ages is no less than 110 years
What is the youngest age John's cousin can be?
Let
x -----> John's age
y -----> John's cousin's age
we know that
-----> equation A
-----> inequality B
Substitute equation A in the inequality B and solve for y
The youngest age John's cousin can be is 48 years