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Natali [406]
3 years ago
12

Which value of b would make x²+bx-30 factorable? A. -31 B. -17 C. 11 D. 13

Mathematics
2 answers:
oksian1 [2.3K]3 years ago
7 0
I think the answer is. D 14
dimulka [17.4K]3 years ago
5 0

Answer:

D. 13

Step-by-step explanation:

well since it's a quadratic equation, it can be written in the form of ax²+bx+c=0. So we have a=1, b=b and c= -30. Also the roots are given by the equation-

x= -b±\sqrt{b^{2}-4ac} /2a. So all I did was put the number from the choices which would satisfy the sqrt part and that turned out to be 13 since \sqrt{13^{2}-4*1*(-30) = \sqrt{289} = 17. So b=13.

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Please Helpppppp!!!!! What is the value of x.
timama [110]

Answer:

Step-by-step explanation:

Remark

By corresponding angles and vertical angles, these two angles are equal.

Equation

-1 + 14x = 12x + 17                      Subtract 12x   from both sides

Solution

-1 + 14x - 12x = 12x - 12x + 17

-1 + 2x = 17                                 Add 1 to both sides

-1+1 + 2x = 17 + 1

2x = 18                                       Divide by 2

2x/2 = 18/2

x = 9

8 0
2 years ago
Can someone pls help? Thx
sergey [27]
Your answer would be -3/4n+3/8 because 1/4•-3/1n would be -3/4n and then 1/4•3/2 would be 3/8 so your answer would then be -3/4n+3/8.
5 0
3 years ago
What is the y-intercept for the function?
Serjik [45]

Answer:

The y -intercept of a graph is the point where the graph crosses the y -axis. (Because a function must pass the vertical line test , a function can have at most one y -intercept . ) The y -intercept is often referred to with just the y -value.

Step-by-step explanation:

Y - intercept represents the position of a point on y-axis or when a line passes through y-axis, it, actually, passes through a point on y-axis. And that point is called the y intercept. It is usually represented by and as a point, it is represented as.

It's called the "y intercept" and it's the y value of the point where the line intersects the y- axis. For this line, the y-intercept is "negative 1." You can find the y-intercept by looking at the graph and seeing which point crosses the y axis. This point will always have an x coordinate of zero.

Hoped this helped! :D

7 0
3 years ago
Read 2 more answers
Which is the graph of the function f(x) = one-halfx2 + 2x – 6?
guapka [62]

Answer:

1/2 x^2 + 2x - 6 = 0

(1/2 x - 1)(x + 6) = 0

zeroes are 2 and -6

so the graph intersects x axis at -6 and 2  

The only one to do that is diagram A  

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Asappppp!!!!!!!!!!!!!!!!!!!!!!!!
Scrat [10]
42 because x is equal to its corresponding side
7 0
3 years ago
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