Okay, you will need to use the law of cosines for this problem.
The Law of Cosines states (in this case): a^2 = b^2 + c^2 - 2 * b * c * cos A, where "a" is the side opposite angle A (7 inches), and b and c are the other two sides.
Plug the numbers in and you get: 7^2 = 5^2 + 9^2 - 2 * 5 * 9 * cos A, or:
49 = 25 + 81 - 90 * cos A.
Subtract (25 + 81) from both sides to get:
-57 = -90 * cos A.
Divide by -90 on both sides:
cos A = 19/30
To find A, you do the inverse trigonometric function to get:
cos^-1 of (19/30) = A.
I don't have a calculator that can do this right now, but if you plug the left side of the above equation into it (make sure it is in degrees, not radians), you should get A.
Step-by-step explanation:
The sequence is an AP with common difference -7.
Therefore the next 2 terms are 1 and -6.
Check the picture below.
now, notice, each square in the grid is 2 units, so, x = 8, y = 10 and x = 13, y = 5

-1 or -1/1, or -(vertical distance) / (horizontal distance)
the negative means is dropping, and 1/1 means, for every foot going down, it moves farther away from the kicker by 1 foot.
Answer:
Area of ¼th part of circle =¼πr²=¼×3.14×12²
=113.04in²
Area of rectangle ABCD=l×b=8×17=136in²
Area of rectangle DEFG=l×b=5×3=15in²
<u>Total</u><u> </u><u>area</u><u> </u><u>:</u><u> </u><u>1</u><u>1</u><u>3</u><u>.</u><u>0</u><u>4</u><u>+</u><u>1</u><u>3</u><u>6</u><u>+</u><u>1</u><u>5</u><u>=</u><u>2</u><u>6</u><u>4</u><u>.</u><u>0</u><u>4</u><u> </u><u>=</u><u>2</u><u>6</u><u>4</u><u> </u><u>square</u><u> </u><u>inches</u><u>.</u>
1 to 4; 1 for every 4; 1/4;