Answer: 100
Step-by-step explanation:
25*4 = 100
Step-by-step explanation:




Answer:
150 square meters
Step-by-step explanation:
Assuming that this field is triangular, we can multiply the two shortest sides together, and then divide by 2, because that is the formula for the area of a right triangle.
So 15 times 20 is 300
300 divided by 2 is 150
So we can estimate the area to be 150 square meters.
(Upon solving further, we realize that this is a right triangle, so our initial estimation is the exact area)
ANSWER
The general solution is
, where
is an integer
<u>EXPLANATION</u>
In order to solve the linear congruence;

We need to determine the inverse of
(which is a Bézout coefficient for 33).
To do that we must first use the Euclidean Algorithm to verify the existence of the inverse by showing that;

Now, here we go;



The greatest common divisor is the last remainder before the remainder of zero.
Hence, the
.
We now express this gcd of 1 as a linear combination of 33 and 280.
We can achieve this by making all the non zero remainders the subject and making a backward substitution.


Equation (2) in equation (1) gives,



The above linear combination tells us that
is the inverse of
.
Now we multiply both sides of our congruence relation by
.

This implies that;

.
Since this is modulo, the solution is not unique because any integral addition or subtraction of the modulo (280 in this case) produces an equivalent solution.
Therefore the general solution is,
, where
is an integer