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erma4kov [3.2K]
3 years ago
15

Let 3x^2+kx+4. determine all values of k such that the quadratic equation f(x) =0 has one real root

Mathematics
1 answer:
user100 [1]3 years ago
7 0
//I'll use the discriminant rule for this.
b^2 - 4ac = 0 when one real root

Therefore, k^2 - 4*3*4= 0
k^2 = 48
k= +-4√3
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Matt is cutting quilt squares measuring 3 inches on each side. He wants to use them to make a rectangular wall hanging measuring
Andrei [34K]

Answer:

Matt will need 10176  square quilts to cover the wall

Step-by-step explanation:

To answer this perfectly, we will have to first convert everything to the same unit.

dimensions of the quilt squares = 3 inches

Length of the wall = 1 yard = 36 inches

Breadth of the wall = 212 feet = 2544 inches.

The next step, is to find the area of the wall that Matt is covering.

Area of wall = length X breadth = 36 X 2544 = 91584in ^{2}

We will also find the area of the square quilts. This is given as length X length = 3^{2}=9 in^{2}

to get the number of square quilts that will cover that area, we will have to divide the area of the wall by the area of the quilts

= 91584 /9 = 10176 quilts

Matt will need 10176 quilts to cover the wall

5 0
3 years ago
Please help: Triangle ABC is similar to triangle PQR where
andre [41]
Explanation:




AB=7
AC=9
You are looking for R


7+9=16


So R is 16
6 0
3 years ago
What is the answer to 186,000 miles per second rounded to the nearest thousand miles per second.
vitfil [10]
I didn't round by the answer would be 115.575042 miles per second.
3 0
3 years ago
What is the ratio of the number of sides of a quadrilateral to the number of sides of a pentagon?
IgorC [24]
4:5 because a quadrilateral has 4 sides and a pentagon has 5 sides
3 0
3 years ago
How can I find the y-intercept of 3x-2y≤10?
frosja888 [35]

Answer:

Step-by-step expla3

x − 2 y < 10

Solve for  y .

Tap for more steps...

y > − 5+ 3 x 2

Find the slope and the y-intercept for the boundary line.

Tap for more steps...

Slope:  

3 2

y-intercept:  

( 0 , − 5 )

Graph a dashed line, then shade the area above the boundary line since  

y

is greater than  

− 5 + 3 x 2 . y > − 5 +3 x2

4 0
3 years ago
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