0.18 or as a fraction: 9/50
Answer:
B) x = 3 or x = -5/2
Step-by-step explanation:
Solve for x over the real numbers:
2 x^2 - x = 15
Subtract 15 from both sides:
2 x^2 - x - 15 = 0
x = (1 ± sqrt((-1)^2 - 4×2 (-15)))/(2×2) = (1 ± sqrt(1 + 120))/4 = (1 ± sqrt(121))/4:
x = (1 + sqrt(121))/4 or x = (1 - sqrt(121))/4
sqrt(121) = sqrt(11^2) = 11:
x = (1 + 11)/4 or x = (1 - 11)/4
(1 + 11)/4 = 12/4 = 3:
x = 3 or x = (1 - 11)/4
(1 - 11)/4 = -10/4 = -5/2:
Answer: x = 3 or x = -5/2
Answer:
y = 7x - 9
slope = 7
draw on graph
x y
-3. -30
-2. -23
-1. -16
0. -9
1. -2
2. 5
3. 12
y intercepts at x= 0 which is -9
y = 3x -1
slope = 3
x y
-3. -10
-2. -7
-1. -4
0. -1
1. 2
2. 5
3. 8
y intercepts at x= 0 which is -1
for x= 2 , y = 5 in both graphs
so (2,5) is intersection point
or we can solve by equating equation
7x-9 = 3x-1
4x = 8
x=2
y = 3*2 -1 = 5
(x,y) = (2,5)
Step-by-step explanation: