3a>-6 , a>-2
therefore A is the answer
Answer:
m∠CFB m∠CAB m∠EAD m ∠CAB + m∠EAD
45° 19.93° 70.07° 90°
50° 29.91° 70.09° 100°
60° 49.92° 70.08° 120°
75° 79.92° 70.08° 150°
m∠CFB BF CF DF EF BF + DF CF + EF BF × DF CF × EF
45° 2.69 2.74 9.09 8.91 11.78 11.65 24.45 24.41
50° 3.7 3.63 8.07 8.23 11.77 11.86 29.86 29.87
60° 5.35 4.72 6.42 7.28 11.77 12.00 34.35 34.36
75° 7.3 5 4.47 6.52 11.77 11.52 32.63 32.6
Step-by-step explanation:
edmentum
Answer:
f(2a−1)=7a−13
7(2a−1) − 13
14a − 7 − 13
14a − 20
Step-by-step explanation:
replace a with f(2a − 1)
distribute the bracket
combine -7 and -13 because they are the like terms here.
Answer:
![\left[\begin{array}{cccc}-12&-13&13&|15\\7&-10&-3&|11\\7&14&5&\:\:\:|-5\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7D-12%26-13%2613%26%7C15%5C%5C7%26-10%26-3%26%7C11%5C%5C7%2614%265%26%5C%3A%5C%3A%5C%3A%7C-5%5Cend%7Barray%7D%5Cright%5D)
Step-by-step explanation:
The system of equations is;
-12x-13y +13z =15
7x-10y-3z = 11
7x+14y +5z = -5
The coefficient matrix is ![\left[\begin{array}{ccc}-12&-13&13\\7&-10&-3\\7&14&5\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-12%26-13%2613%5C%5C7%26-10%26-3%5C%5C7%2614%265%5Cend%7Barray%7D%5Cright%5D)
The constant matrix is ![\left[\begin{array}{c}15\\11\\-5\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D15%5C%5C11%5C%5C-5%5Cend%7Barray%7D%5Cright%5D)
The augmented matrix is ![\left[\begin{array}{cccc}-12&-13&13&|15\\7&-10&-3&|11\\7&14&5&\:\:\:|-5\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7D-12%26-13%2613%26%7C15%5C%5C7%26-10%26-3%26%7C11%5C%5C7%2614%265%26%5C%3A%5C%3A%5C%3A%7C-5%5Cend%7Barray%7D%5Cright%5D)
Answer:
hi lol
Step-by-step explanation: