I had a study guide of 35 questions and I got kinda confused on these questions. I had used the formulas and got answers but some didn't quite match.
Really need help.
Use the quadratic formula to solve y2+10y+24 = 0.
a.
b. 4, 6
c.
d. -4, -6
*Answer: I used the quadratic formula to solve and got y=-6,-4. So would my answer be D.?
Solve by factoring: a2 -5a-14 = 0.
a. 5, 14
b. -7, 2
c. 2, 7
d. 7, -2
*Answer: I factored and got a=-2,7 so would my answer be D.?
Solve x2-2x-3>0.
a. (-3, 1)
b. (-1, 3)
c. (- ? , -3) U (1, ? )
d. (- ? , -1) U (3, ? )
*My answer was x<-1 or x>3 so would my answer be B. or D.?
Solve the inequality .
a. [-3/2, 3]
b. (- ? , -3] U [3/2, ? )
c. (- ? , -3/2] U [3, ? )
d. [-3, 3/2]
* My answer was -3/2<x<3 so would I choose C.?
Determine the center and radius of the circle (x+2)2+(y-1)2 = 16
a. center: (2, -1); radius: 4
b. center: (2, -1); radius: 16
c. center: (-2, 1); radius: 4
d. center: (-2, 1); radius: 16
* My answer was C. Am I right?
Really need help.
Use the quadratic formula to solve y2+10y+24 = 0.
a.
b. 4, 6
c.
d. -4, -6
*Answer: I used the quadratic formula to solve and got y=-6,-4. So would my answer be D.?
Solve by factoring: a2 -5a-14 = 0.
a. 5, 14
b. -7, 2
c. 2, 7
d. 7, -2
*Answer: I factored and got a=-2,7 so would my answer be D.?
Solve x2-2x-3>0.
a. (-3, 1)
b. (-1, 3)
c. (- ? , -3) U (1, ? )
d. (- ? , -1) U (3, ? )
*My answer was x<-1 or x>3 so would my answer be B. or D.?
Solve the inequality .
a. [-3/2, 3]
b. (- ? , -3] U [3/2, ? )
c. (- ? , -3/2] U [3, ? )
d. [-3, 3/2]
* My answer was -3/2<x<3 so would I choose C.?
Determine the center and radius of the circle (x+2)2+(y-1)2 = 16
a. center: (2, -1); radius: 4
b. center: (2, -1); radius: 16
c. center: (-2, 1); radius: 4
d. center: (-2, 1); radius: 16
* My answer was C. Am I right?