Answer:
9. 18x
10. x - 9
11. 12x
12.
13. 2(x - 11)
14.
Step-by-step explanation:
9. Remember that product means multiply, so 18 * x is the equation. Or 18x.
10. If the price is represented by x, and it decreases by 9, then we can represent that by x - 9.
11. Times means multiply. We can use x for the number of hours, so 12 * x or 12x works in this situation.
12. Sum means to add so we would add c squared and 14 to get c^2 + 14.
13. A number decreased by 11 is represented by x - 11, and all of that is multiplied by 2.
14. A number divided by 4 is represented by the x/4. All that is multiplied by 5.
<em>I hope this helps!!</em>
<em>- Kay :)</em>
Answer:
cos(x-30)=1/2
Step-by-step explanation:
We use the following relationship to obtain cos(x)
From that, we have that cos(x)= sqrt(1-1/4)=sqrt(3) / 4
To obtain the value of cos(x-30), lets remember the following expression:
Therefor, we can use that to obtain our desired function cos(x-30)
cos(x)*cos(30)+sin(x)*sin(30)
=2/4=1/2