Answer:
7a ( 1,1)
7b ∅ or no solution
Step-by-step explanation:
The solution to the system is where the two functions intersect
For 7a. The parabola and the line intersect at (1,1)
For 7b The parabola and the line do not intersect so there is no solution
Answer:

Step-by-step explanation:
If 3, 9, 10, x are in proportion. Then,


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<h3>Hope it is helpful.....</h3>
Answer:
2.71
Step-by-step explanation:
-(1.46) +(_3.82)+7.99= -1.46-3.82+7.99
2.71
Numbrs are divided in real and imaginary, so they can't be together one thing
Complex number are imaginary numbers
in the other hand if you multiply am complex by i than you get a real number, but that is just a way of expressing, so not all numbers are complex.
(5i)²=-25----- a real number is a product of 2 imaginary but it doesn't mean that we can say all are complex
(the explaination is subjectiv, based just in my opinion and knowlige hope it helps)