Answer:
-18
Step-by-step explanation:
Multiply the numbers
3*6
-7 + 9 - 18 - (5 + 9) ÷ 7
Add the numbers
5+9
-7 + 9 - 18 - 14 ÷ 7
Divide the numbers
14÷ 7
-7 + 9 - 18 - 2
Calculate the sum or difference
-18
Answer = -18
Answer:
just guess
Step-by-step explanation:
i got it right
Answer:
448/32=14
Step-by-step explanation:
Assume the first even integer is x.
The next even integer will be 2 digits after this digit. So the next even integer will be x+2.
The reciprocals of these two even integers can be written as

and

respectively.
The sum of their reciprocals is 7/24. So we can set up the equation as:

Taking LCM on left hand side:

Cross Multiplying the denominators:

Using the quadratic formula to solve the above equation:

Since, the value of x can only be an integer, we discard the fractional value and keep x=6
So the first even integer is 6 and the next even integer is 8. The sum of reciprocals of 6 and 8 is 7/24
Let's call the midpoint of GF M.
MF = 16/2 = 8
KF = 25.89
MK = sqrt(25.89^2 - 8^2)
MK = 24.62
MKF = 8 * 24.62 / 2 = 98.48 square units for one triangle
There are 20 of those triangles that make up the decagon.
Therefore the total area = 20(98.48) = 1969.6 which would be option C