Answer:
21/10 (Decimal: 2.1)
Step-by-step explanation:
13/10 + 4/5
= 13/10 + 4/5
= 13/10 + 8/10
=13 + 8 /10
=21/10
(Decimal: 2.1)
Answer:
Step-by-step explanation:
2x² + 5x - 12 = 0
- a = 2, b = 5, c = -12
- x = (-b ± D)/2a
- D = √b² - 4ac = √5² -4*2*(-12) = √25+96 = √121 = 11
- x = (-5 ± 11)/4
Correct choice is the second one or B
Answer:
43y
Step-by-step explanation:
Answer:
6 ± i and 6 ± i
Step-by-step explanation:
Let x be the first number.
Let y be the second number.
x + y = 12
x × y = 37
Solve for x in the first equation.
x = 12 - y
Put x as 12-y in the second equation and solve for y.
(12- y)y = 37
12y - y² = 37
- y² + 12y - 37 = 0
y = 6 ± i
Put y as 6 ± i in the first equation and solve for x.
x + 6 ± i = 12
x = 12 - 6 ± i
x = 6 ± i