Answer:
C
Step-by-step explanation:
Given
2x² + x - 1 = 2 ( subtract 2 from both sides )
2x² + x - 3 = 0
Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.
product = 2 × - 3 = - 6 and sum = + 1
The factors are - 2 and + 3
Use these factors to split the x- term
2x² - 2x + 3x - 3 = 0 ( factor the first/second and third/fourth terms )
2x(x - 1) + 3(x - 1) = 0 ← factor out (x - 1) from each term
(x - 1)(2x + 3) = 0
Equate each factor to zero and solve for x
x - 1 = 0 ⇒ x = 1
2x + 3 = 0 ⇒ 2x = - 3 ⇒ x = -
Answer:
Add total rolls:
The number of rolls is the height of each bar:
14 + 12 + 16 + 15 + 13 = 70
70 total rolls
The numbers greater than 3 are 4 and 5
4 was rolled 15 times and 5 was rolled 13 times
15 + 14 =28 Total times
The probability of that happening would be 28/70 which reduces to 2/5
The answer as a fraction is 2/5 which is 40% as a percentage.
IF your graph matches this data :)
Answer:
Option A. 52°
Step-by-step explanation:
From the figure attached,
JEFH is a parallelogram and ΔFGH is a scalene right triangle.
If m∠JEF = 142°
m∠JHF = 142° [Since opposite angles of the parallelogram are equal]
m∠FHG + m∠JHF = 180°
m∠FHG + 142° = 180°
m∠FHG = 180 - 142
= 38°
In the given scalene right triangle FGH,
m∠FHG + m∠HFG + m∠HGF = 180°
38° + m∠HFG + 90° = 180°
m∠HFG = 180° - 128°
m∠HFG = 52°
Option A. will be the answer.
Answer:
4 l
the total ml of milk for 20 people is 4000ml and not 400 ml. 4000ml converted to litres is 4l
Step-by-step explanation:
total amount of milk for 20 people = 200 x 20 = 4000ml
1000 ml = 1 liter
4000ml /1000 = 4 l
For the equation:
-1=5 x^2 - 2 x
5 x^2 - 2 x + 1 = 0, then we substitute: a=5, b=-2, c =1
to discriminant formula: D= b^2 - 4 a c = (-2)^2 - 4 * 5 * 1 = 4 - 20 = - 16
Answer:
The discriminant is equal to -16 which means the equation has no real number solutions.