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liubo4ka [24]
2 years ago
12

HELP

Mathematics
1 answer:
Lostsunrise [7]2 years ago
3 0

Answer:

A.

{b}^{2}  + 3b - 3 = 0

Step-by-step explanation:

{b}^{2}  + 3b - 3 = 0 \\ because \:  \:  {b}^{2}  < 4ac \\ {b}^{2}    = {3}^{2}  = 9 \\ 4ac = 4 \times 1 \times  - 3 =  - 12 \\ hence :  {b}^{2}  < 4ac

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I REALLY NEED TO PASS THIS LESSON PLZZZZ HELPPPP!!!!!
galben [10]

Since she has "no more than $40 to spend" we know that the the symbol must be "less than or equal to" \leq.  Now we can eliminate the first and second choices because they are "greater than or equal to".


Next, we can figure out how to model this situation.  There is a flat $5 fee and each song is $2.  We can model this with 2s+5 ($2 per son plus $5).  


The answer is 2s+5\leq 40


Hope this helps!

6 0
3 years ago
How to show work on (-41)+(14)=
sergij07 [2.7K]
It is hard to show work for this problem because it very similar to a basic addition or subtraction problem.
Just so you have the answer and how to solve. -27 is the answer. Think about it like 41-14 then add the negative back. But I would strongly suggest not writing that as work because you teacher might get confused about what you are doing
4 0
3 years ago
Which is the correct formula to find the distance between two points (p,q) and (m,n)?
Dafna1 [17]

Answer:

The answer is d = √[(p - m)² + (q - n)²] ⇒ first answer

Step-by-step explanation:

* The distance between any to points (x1 , y1) , (x2 , y2) is

- d = √[square the difference of x- coordinates plus

        square the difference of y-coordinates]

∴ d = √[(x2 - x1)² + (y2 - y1)²] or

∴ d² = (x2 - x1)² + (y2 - y1)²

* x2 - x1 is the horizontal distance (h) and y2 - y1

 is the vertical distance (v)

- By using Pythagoras theorem

∴ d = √[h² + v²]

∵ The two points are (p , q) and (m , n)

- Put x1 = m and y1 = n

- Put x2 = p and y2 = q

∴ d² = (p - m)² + (q - n)²

∴ d = √[(p - m)² + (q - n)²]

∴ The answer is d = √[(p - m)² + (q - n)²] ⇒ first answer

6 0
3 years ago
Read 2 more answers
The profit when selling 'x' pairs of shoes is P(x)=-4x^2+32x-39. How many pairs of shoes should be sold in order to maximize the
Vitek1552 [10]

Answer: 4 pairs

Step-by-step explanation:

Given

Profit on selling 'x' pairs of shoes is P(x)=-4x^2+32x-39

Find the derivative of the function to find out the critical points

\Rightarrow -8x+32=0\\\Rightarrow x=4

Thus, for 4 pair of shoes profit is maximize.

5 0
3 years ago
I need need help on this
Crazy boy [7]

Answer:

points A, B and D are all in the same plane but not all are on the same line

Step-by-step explanation:

points A, C, D are all collinear which means they must also be coplanar

3 0
3 years ago
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