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Nataliya [291]
3 years ago
5

How many times does X squared minus 4X -12 cross the X axis

Mathematics
1 answer:
kolbaska11 [484]3 years ago
4 0

We can solve this problem using discriminant.

x^2-4x-12's discriminant is

(-4)^2-4*-12=16+48 which is clearly larger than 0

This means that it crosses over the axes 2 times.

In case you don't know what discriminant is, its in equation ax^2+bx+c

the discriminant is b^2-4ac.

If its positive it has 2 crosses with x axis, if negative then 0 crosses, if 0 then 1 cross.

Hope this helped at least a little bit :D

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Liam earned a grade of 65% on his miltiple choice science final that had a total of 140 problmes. How many problems on the final
Vsevolod [243]

Answer:

49

Step-by-step explanation:

65% of 140

65/100 × 140

= 91 right

140 - 91

= 49 wrong

8 0
2 years ago
Two-thirds of a number, decreased by thirty-six, is at most twenty-two. Find the number.
Nataliya [291]

Answer:

87 is the number

Step-by-step explanation:

6 0
2 years ago
This last one I need help on too
ExtremeBDS [4]

Answer:

x=\frac{3}{4}+i\frac{\sqrt{7}}{4},\:x=\frac{3}{4}-i\frac{\sqrt{7}}{4}

Step-by-step explanation:

simplify \frac{-3}{x-2} by putting the negative sign on the outside. \frac{2x}{x-1}-\frac{2x-5}{x^2-3x+2}=-\frac{3}{x-2}

find the LCM of the denominators. It is (x-1)(x-2). Multiply by the LCM:

\frac{2x}{x-1}\left(x-1\right)\left(x-2\right)-\frac{2x-5}{x^2-3x+2}\left(x-1\right)\left(x-2\right)=-\frac{3}{x-2}\left(x-1\right)\left(x-2\right)

Simplify:

2x\left(x-2\right)-\left(2x-5\right)=-3\left(x-1\right)

solve: x=\frac{3}{4}+i\frac{\sqrt{7}}{4},\:x=\frac{3}{4}-i\frac{\sqrt{7}}{4}

3 0
3 years ago
Find this area <br> A) 492.5ft2<br> B) 508.2ft2<br> C) 515.3ft2<br> D)551.6ft2
kap26 [50]
I think it’s A I’m sorry if I am wrong so I am pretty sure it’s A
4 0
3 years ago
You find the following financial information about a company: net working capital = $735; fixed assets = $5,385; total assets =
ddd [48]

Answer:

Company's total liabilities are $6,351.

Step-by-step explanation:

A company's financial information is given, we have to calculate the company's total liabilities.

Total assets = Fixed assets + current assets

Current assets = Total assets - Fixed assets

                         = $8,190 - $5,385

                         = $2,805

Networking capital = Current assets - Current liabilities

                        $735 = $2,805 - current liabilities

  Current liabilities   = $2,805 - $735

  Current liabilities   = $2,070

Total liabilities = Long term debt + current liabilities

                         = $4,281 + $2,070

                         = $6,351

Company's total liabilities are $6,351.

5 0
3 years ago
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