A [2 -62] is the correct answer
8x +7y = 39 multiply everything by 2
2(8x +7y = 39)
16x +14y = 78
+4x - 14y= -68
-------------------------
20x = 10
20x /20 = 10/20
x = 1/2
Plug x into first formula
8 x + 7y =39
8(1/2) 7y=39
4+ 7y =39
4-4+7y =39-4
7y =35
7y/7 = 35/7
y = 5
(1/2, 5)
Answer:
4 - i
Step-by-step explanation:
Intuitively, the answer will be 4 - i, as the other numbers are too big to have a square as small as 17i. Also, we know that i will not be in the end result, which means that we should have a negative in the result as well.
To test this, we can simply treat 4 and -i as the sides of a right triangle and find the hypotenuse:

So indeed the answer is 4 - i

Actually Welcome to the Concept of the inequalities.
9p -9 <4p -2
===> 9p - 4p < -2 +9
===> 5p < 7
===> p < 7/5
hence the answer is P < 7/5
We need a 2 and a 3 to produce a six. Because we are dividing by "
"...
We need a "
" in the numerator.
In this way, x+y = 5+3 = 8.
answer: 8