Answer:
x=7 and y=4
Step-by-step explanation:
I will use the elimination method:
Since the co-efficient of both y's are the same number but different signs we add the 2 equations to eliminate the y:
3x + y =25
+ + +
2x - y = 10
Simplify:
5x=35
Divide both sides by 5:
5x÷5=35÷5
Simplify:
x=7
Substitute this into either equation 1 or 2 ( I chose 1):
3(7) + y = 25
21 + y = 25
Subtract 21 from both sides and simplify to get y:
21+y-21=25-21
y=4
Therefore x=7 and y=4
That's easy, here let me show you a example:
Answer:
The polynomial x3 + 8 is equal to (x + 2)(x2 - 2x + 4).
Well we know that it’s multiplying by 2.5 every time to get from 8 to 20 to 50 etc
Answer:
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Step-by-step explanation:
