What is the value of b2 - 4ac for the following equation? x^2 + 5x + 4 = 0
Answers
b=5
c=4 so b^2-4ac=(5)^2-4(1)(4)=25-16=9
Related Questions
Which best explains whether or not all isosceles triangles are similar?a.All isosceles triangles are similar. Two angles within each triangle are always congruent.b.All isosceles triangles are similar. The triangle sum theorem states that the sum of the angles in a triangle is 180°. Therefore, the third angle can always be determined. c.All isosceles triangles are not similar. The pair of congruent angles within one triangle is not necessarily congruent to the pair of congruent angles within the other triangle.d.All isosceles triangles are not similar. Given only the vertex angle of an isosceles triangle, there is not enough information to determine the measures of the base angles. Therefore, it is not possible to determine if the base angles of one isosceles triangle are congruent to the base angles of another.
Determine the domain of the function.f as a function of x is equal to the square root of eleven minus x. Answer Choices: All real numbers except 11 x > 11 All real numbers x ≤ 11
If I Had 2 apples and My friend gave me 4 more so i gave him 3 back how many apples are there?
Work Out 2/3 Divided By 1/4. Give Your Answer In The Simplest Form.
Answers
So we replace x and y with the numbers given in the problem statement.
2=k/8
Then we
Answer: y= 16/x
Step-by-step explanation:
3y − x = 4
graph of two lines that intersect at the point (negative 1, 1)
graph of two lines that intersect at the point (1, 1) < Not
graph of two parallel lines with positive slopes
None of the above
Answers
Answer: Graph of two lines that intersect at the point (negative 1, 1).
Step-by-step explanation:
The given system of linear equations :
Multiply equation (1) by 3 , we get
Subtract equation (2) from (3), we get
Divide both sides by 7 , we get
x=-1
Put value of x in (1), we get
⇒ both lines are intersecting at (x,y)=(-1,1)
∴ The correct graph of the given system of equations : graph of two lines that intersect at the point (negative 1, 1)
Answer:
(-1,1) One solution
Step-by-step explanation:
Use these steps for the equations:
1) Rewrite the equation in slope intercept form.
2) Graph the first equation.
3) Graph the second equation.
4) Identify the point of intersection.
B. 3r + 6
C. 3r - 6
D. 6 + 3r
Answers
Answer:
C
Step-by-step explanation:
let r be the number of stamps Chris has then
3times this amount is 3r and less 6 is subtract 6 from 3r, hence
Erykah has 3r - 6 stamps → C
Step 2: 4y − 2y − 4 = 12
Step 3: 2y − 4 = 12
Which of these is most likely the next step?
2y = 3
2y = 8
2y = 16
2y = 18
Answers
2y - 16
Answer:
2y=16 Or the Third Option
Step-by-step explanation:
Trust me because i just got done doing my test and i got the question correctly.
-3x + 2y = 9
A. (3,9)
B. (-27,9)
C. (-3,-6)
D. (-9,9)
Answers
use elimination
add them together to cancel x terms
3x-4y=9
-3x+2y=9 +
0x-2y=18
-2y=18
divide by 2
-y=9
multiply -1
y=-9
subsituete
3x-4y=9
3x-(4 times -9)=9
3x-(-36)=9
3x+36=9
subtract 36 from both sides
3x=-27
divide both sides by 3
x=-9
x=-9
y=-9
the answer is in (x,y) form
(-9,-9)
the answer is none of them (D is closest)
Answer:
(-9,-9)
Explanation:
The two given equations are:
3x - 4y = 9
-3x + 2y = 9
First step is to add the two equations in order to eliminate the x.
This will give us:
-4y + 2y = 9 + 9
-2y = 18
y = -9
Now, we substitute with the value of y in any of the equations to get x as follows:
3x - 4y = 9
3x - 4(-9) = 9
3x + 36 = 9
3x = -27
x = -9
Hope this helps :)
number. What are the numbers?
Answers
Answer: x=68, y=37
Step-by-step explanation:
The equation for the sum of two numbers is 105 would be x+y=105. You can say the larger number would be x and the smaller would be y. So, x=2y-6. then you plug that into the x in the first equation.
2y-6+y=105
3y-6=105
3y=111
y=37
Then you would plug in the y to one of the equations. I will do the second one but you can do either one.
x=2y-6
x=2*37-6
x=74-6
x=68