H. x^2 + y^2. 3^2 + 4^2 = 9 + 16 = 25. 25 is odd, so (H) is correct.
A
This problem looks harder than it really is. If
23.
H
Multiply through and solve for y by isolating it on one side of the equation:
24.
C
Isolate x on one side of the equation:
Then can be rewritten as 0.75, so subtracting 0.75 from 8.3 gives you 7.55.
25.
J
Multiply through and then find a in terms of m by isolating a on one side of the equation:
26.
B
Ordinarily you would not be able to solve for three variables with only two equations. In this case, however, what can you
deduce from the fact that both equations are identical except for the coefficient of c? Subtracting the first equation from the
second you will see that c = 0. This is the only way that both a + 2b + 2c and a + 2b + 3c can equal 5. Therefore, a + 2b = 5
27.
