Step-by-step explanation:
According to the question, sin (0) is (-)ve
therefore, sin(0)= -15/17
AND , tan(0) = sin(0) / cos(0)
= 15/8
It is decreasing at B. (ln9/3,∞)
3x+4x+2-1=5x+1
7x+1=5x+1
7x-5x=1-1
2x=0
x=0
Step-by-step explanation:
Seven more than twice a number is 47. Let's break down this sentence into numbers so you can see what's going on.
"Seven more than twice a number" - This tells you that there is a number, let's call it y, that is 7 more than twice a different number, lets call this x. So in equation form this is y = 7 + 2x. Hmm this seems a little tricky, how do we find the answer? Well if we keep reading, it tells you that the number that is 7 more than twice another number is 47, so we now know that y = 47. So let's redo our equation by substituting y for the number 47:
47 = 7 + 2x
Now we have a workable equation. We need to solve for x. So let's rewrite this equation without changing it, just putting it in different order. Now we have 2x + 7 = 47. So how do we solve for x? First, we subtract 7 from both sides. Remember, when solving for x, anything you do to one side you must do to the other. So now we get this:
2x + 7 = 47 simplifies to 2x = 40
Now if we divide both sides by 2 to get x all by itself, we get x = 20. That is your answer. You can check it by substituting 20 for s in your original equation of 2x + 7 = 47, then you get 2(20) + 7 = 47. It works! Hope this helps!
Answer:
The slope is
.
Step-by-step explanation:
☆Remember: ![m = \frac{y_2 - y_1}{x_2 - x_1}](https://tex.z-dn.net/?f=m%20%3D%20%20%5Cfrac%7By_2%20-%20y_1%7D%7Bx_2%20-%20x_1%7D%20)
☆To find the slope, all we need to do is plug in according to the formula.
![m = \frac{2 - 7}{1 - 8} = \frac{ - 5}{ - 7} = \frac{5}{7}](https://tex.z-dn.net/?f=m%20%3D%20%20%5Cfrac%7B2%20-%207%7D%7B1%20-%208%7D%20%20%3D%20%20%5Cfrac%7B%20-%205%7D%7B%20-%207%7D%20%20%3D%20%20%5Cfrac%7B5%7D%7B7%7D%20)
☆Therefore, the slope is
.