What are the solutions to the equation x2 − 1 = 399?

a. x=20 and x=-20

b. x=200 and x=-200

c. x=400 and x=-400

d. x=398 squared and x=-398 squared

What are the solutions to the equation 4x2+3x=24-x

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20