12. How many real-number solutions does the equation have?
(Image: 0 equals 3 x squared minus 5x minus 5) (1 point)
one solution
two solutions
no solutions
infinitely many solutions
No solutions.
one more question
Sure, go ahead with your question.
14. What are the solutions to the system?
y = x2 + 3x – 4
y = 2x + 2 (1 point)
(–3, 6) and (2, –4)
(–3, –4) and (2, 6)
(–3, –4) and (–2, –2)
no solution
(-3, 6) and (2, -4)
15. Simplify the radical expression.
(Image) (1 point)
(Image: 2 Start Root 6 End Root)
(Image)
–(Image)
12
2√6
16. Simplify the expression.
(Image: start root 5 end root plus 7 start root 5 end root) (1 point)
(Image: 7 Start Root 10 End Root)
(Image: 8 Start Root 5 End Root)
(Image: The term states 6 times the square root of 5.)
(Image: 8 Start Root 10 End Root)
8√5
17. What is a simpler form of the following expression?
(–10x3 + 30x – 20) ÷ (–5x + 5) (1 point)
2x2 – 2x + 4
–2x2 – 2x – 4
–2x2 + 2x + 4
2x2 + 2x – 4
2x² - 2x + 4
18. Solve the equation.
(Image) (1 point)
x = 1
x = –(Image: start fraction 23 over 6 end fraction)
x = –(Image: start fraction 5 over 2 end fraction)
x = –5
x = –(5/2)
19. The time t required to drive a certain distance varies inversely with the speed, r. If it takes 2 hours to drive the distance at 67 miles per hour, how long will it take to drive the same distance at 55 miles per hour? (1 point)
about 1.64 hours
about 134.00 hours
about 2.45 hours
about 61.00 hours
About 2.45 hours.
24. What is the simplified form of the expression?
4d-3 • d18 (1 point)
5d–54
5d15
4d15
4d–54
4d¹⁵
25. What is the degree of the monomial?
7x8 (1 point)
7
8
15
56
8
26. What is the factored form of the expression?
t2 – 25 (1 point)
(t + 5)(t + 5)
(t – 5)(t + 5)
(t – 5)(t – 5)
(t – 20)(t – 5)
(t - 5)(t + 5)
28. Simplify the radical expression by rationalizing the denominator.
(Image: 2 over square root 42) (1 point)
(Image: square root 84 over 42)
(Image: square root 42 over 21)
(Image: 21 square root 42)
(Image: square root 2)
√42/21
31. Suppose that y varies inversely with x, and y = 2 when x = 6. What is an equation for the inverse variation? (1 point)
x = (Image: y over four)
y = (Image: 12 over x)
y = 4x
y = (Image: x over 12)