Answer:
Step-by-step explanation:
Given the system of linear equations
solving by the elimination method
so
now solving for y
Multiply powers with the same base : a^b * a^c = a^(b + c)....so basically, u keep the bases and add the exponents.
dividing powers with the same base : (a^b) / (a^c) = a^(b - c)....so basically, u keep the base and subtract the exponents
raising a power to a power : (a^b)^c = a^(b * c)...so basically, u multiply the exponents
Answer:
11 and 9
Step-by-step explanation:
X+Y=20
X*Y=99
Y=20-X
X*(20-X)=99
20X-X^2=99
20X-X^2–99=0
-(X - 11) (X - 9) = 0
Two solutions
X-11=0, X=11
X-9=0, X=9
Y=20-X, so if X is 9, Y is 11
Y=20-X, so if X is 11, Y is 9
The two numbers are 11 and 9