Answer:
The discriminant is -7
Step-by-step explanation:
The discriminant of a quadratic function/equation(ax^2+bx+c = 0) is calculated as:
Here
b is the co-efficient of x
a is the co-efficient of x^2
and c is the constant
Given equation is:
Here
a = -2
b = 5
c = -4
Putting the values in the formula for discriminant
As the discriminant is negative, the equation has no real solution.
Hence,
The discriminant is -7
Answer:
C
Step-by-step explanation:
In the equation y = -x - 4, the gradient is -1.
While in the second equation,
5x + 5y = 20
y = -x + 4
So the gradient is -1 too
Both sides are not perpendicular to each other because if you apply the formula, m1m2 = -1, and if substitute both gradient, (-1)(-1) = 1 ≠ -1
Therefore, no they are not perpendicular but parallel instead.
Add the opposite of 4 so basically -4. Hope this helps
Answer:
B) √5, 5/2, 2.71 (repeating), 2 3/4
Step-by-step explanation:
1) For me, I convert the fractions and squared numbers into decimals
2) 2 3/4 = 2.75
3) √5 (the square root of five) ≈ 2.236
4) 5/2 = 2.5
5) now list the numbers from least to greatest
5) Which number is the least? √5
6) Next? 5/2
7) Next? 2.71 repeating
8) Greatest? 2 3/4
Hope this helps you, good luck with your assignment, and if possible, please mark me brainliest.
Answer:
( x ÷ 4 ) - 3
Step-by-step explanation:
3 less than means minus 3 and the quotient of a number ( x ) and 4.
