Answer:
area of the trapezoid=1/2(7+12)×5
=47.5cm
Looking at the question, I'm assuming it has a mistake.
However, I will first attempt to solve it normally:
Simply combine like terms to get 5x = 180, and thus x = 36, and y = 72
The first mistake possibility is that the first equation should be <u>3x + 2y = 180</u>
If that is the case, simply substitute in 2x for y, turning the equation into
3x + 2 (2x) = 180
3x + 4x = 180
7x = 180
Thus, x = 25.715 and y = 51.43
Another possible mistake is that the first equation should be <u>3y + 2x</u><u> </u><u>= 180</u>
Solve similar to the first mistake
3 (2x) + 2x = 180
6x + 2x = 180
8x = 180
Thus, x = 22.5, and y = 45
Hope it helps :)
Answer:
(A) 1,663,200
(B)330
Step-by-step explanation:
<u><em>(A) </em></u>To do this you would just have to know the combimations formula which is and when you plug in the numbers you get which when simplified is which is 1,663,200
<u><em>(B)</em></u> To do this you would just have to know the permutation formula which is so if we plug in all of the numbers we would get then we can divide 7 from both sides so we get and when you simplify you get which when reduced is 330
<u><em></em></u>
Sorry for the late answers, but the answers are...
6
3.40
1.61
I know this because I had this problem and I got it correct. The screenshot attached is proof that the answers are correct
3.14 is the answer
hope it helped!