Which method should be used to solve the system? Explain your answer, including a description of the first step.3x2 + 10y2 =81-4x2 + 9y2 =9
What will be an ideal response?
Elimination should be used since the equations have the same types of terms (x2, y2, constant), while substitution would require fractions or extra steps. The first step is to multiply the first equation by -4, 4, 9, or -9 or to multiply the second equation by 3, -3, 10, or -10.
You might also like to view...
Solve the problem.To find the distance AB across a river, a distance BC of 824 m is laid off on one side of the river. It is found that B = 106.2° and 
Find AB. Round to the nearest meter.
A. 253 m B. 313 m C. 310 m D. 256 m
Solve the quadratic equation by the square root property. If possible, simplify radicals or rationalize denominators.(x + 5)2 = 11
A. {-5 ± 
}
B. {6}
C. {5 ± 
}
D. {±
}
Find tan A in the right triangle below 
.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Evaluate the expression for the given value of x.
?
?
A. 
B. 
C. 
D. 
E. 