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professor190 [17]

3 years ago

5

If the radius of the cloth is 3 yards,how much binding should she buy?

1 answer:

Schach [20]3 years ago

5 0

Answer:

12

Step-by-step explanation:

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For all functions of the form f(x)=ax^2+bx+c which is true when b=0

tankabanditka [31]

I believe if b were to equal the value of 0, there would be 2 solutions to the function. Or not mainly if the resulting expression turns out to be a difference of squares.

Eg. f(x) = 2x^2 + 0x + 2

2x^2 + 2

2(x^2 + 1)

Here there would not be x intercepts, mainly because x cannot be solved.

8 0

3 years ago

Find the set of values of k for which the line y=kx-4 intersects the curve y=x²-2x at 2 distinct points?

Sonbull [250]

Answer:

$-6 < k < 2$

Step-by-step explanation:

Given

$y = x^2 - 2x$

$y =kx -4$

Required

Possible values of k

The general quadratic equation is:

$ax^2 + bx + c = 0$

Subtract $y = x^2 - 2x$ and $y =kx -4$

$y - y = x^2 - 2x - kx +4$

$0 = x^2 - 2x - kx +4$

Factorize:

$0 = x^2 +x(-2 - k) +4$

Rewrite as:

$x^2 +x(-2 - k) +4=0$

Compare the above equation to: $ax^2 + bx + c = 0$

$a = 1$

$b= -2-k$

$c =4$

For the equation to have two distinct solution, the following must be true:

$b^2 - 4ac > 0$

So, we have:

$(-2-k)^2 -4*1*4>0$

$(-2-k)^2 -16>0$

Expand

$4 +4k+k^2-16>0$

Rewrite as:

$k^2 + 4k - 16 + 4 >0$

$k^2 + 4k - 12 >0$

Expand

$k^2 + 6k-2k - 12 >0$

Factorize

$k(k + 6)-2(k + 6) >0$

Factor out k + 6

$(k -2)(k + 6) >0$

Split:

$k -2 > 0$ or $k + 6> 0$

So:

$k > 2$ or k $> -6$

To make the above inequality true, we set:

$k < 2$ or $k >-6$

So, the set of values of k is:

$-6 < k < 2$

3 0

2 years ago

NUMBER 6 PLEASE HELP ASAP

Aleksandr [31]

Answer:

Part A: 115

Part B: 36000

Explanation:

Part A asks for the perimeter, which is adding, so add up the 15, 40, and 60, which will equal to 115.

Part B asks for the area, which is multiplying, so you multiply the numbers,

15 x 40 x 60 = <u>36000</u>

15 x 40 = 600

600 x 60 = 36000

You could try multiplying it a different way but get the same answer:

60 x 40 x 15 = <u>36000</u>

60 x 40 = 2400

2400 x 15 = 36000

I'm not sure if this is correct but I hope I helped

have a great day/night :))

6 0

2 years ago

Can someone pls help :(

aleksandrvk [35]

Answer:

srry man i suck at civics, but i think it is B?

Step-by-step explanation:

7 0

3 years ago

.6 is ten times as much as

Triss [41]

.6 divided by 10 is .06 so .6 is 10 times more than .06

5 0

2 years ago

Read 2 more answers