The second one, and the two last should be the right answer,
Hope this helped:)
The answer is d) none because substituting -1/4x + 5/3 for y in the first equation gives 3x - 3x + 5/3 = 20 so 5/3 = 20 which is not true.
Answer:

Step-by-step explanation:
we know that
The algebraic expression of the phrase " The sum of square of c and d" is equal to adds the square of number c to the number d

The algebraic expression of the phrase " The sum of square of c and d increased by twice their product" is equal to

Answer:
5/ sqrt2
Step-by-step explanation:
A=b.a.SinC
Answer:
It is 102
Step-by-step explanation: