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3 years ago

If -nx2 + tx + c = 0, what is x equal to?

1 answer:

5 0

$f(x)=-nx^2+tx+c=0\\\\
\Delta=t^2-4\cdot(-n)\cdot c=t^2+4cn\\\\
1.\\
 \Delta0\\
\sqrt{\Delta}=\sqrt{t^2+4cn}\\
x_1=\frac{-t-\sqrt{t^2+4cn}}{2\cdot(-n)}=\frac{t+\sqrt{t^2+4cn}}{2n}\\
x_2=\frac{-t+\sqrt{t^2+4cn}}{2\cdot(-n)}=\frac{t-\sqrt{t^2+4cn}}{2n}\\$

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I need help fast will give brainliest!!!

givi [52]

Answer:

C and D

Step-by-step explanation:

the answers are C and D.

6 0

3 years ago

The Park Protectors is a group of elementary students and teachers from 3232 schools who pick up trash at local parks. The line

pshichka [43]

Answer:

$Each = \frac{15}{128}$

Step-by-step explanation:

Given

See attachment for line plot

Required

Determine the total trash picked

The data on the line plot can be represented as:

$Trash \to Schools$

$\frac{1}{8} \to 6$

$\frac{1}{4} \to 8$

$\frac{1}{2} \to 2$

$1 \to 0$

The total trash picked is:

$Total = \frac{1}{8} * 6 + \frac{1}{4} * 8 + \frac{1}{2} * 2 + 1 * 0$

$Total = \frac{3}{4} + \frac{8}{4} + 1+0$

Take LCM

$Total = \frac{3+8+4+0}{4}$

$Total = \frac{15}{4}$

The total picked by each school is:

$Each = \frac{Total}{32}$

$Each = \frac{15/4}{32}$

Rewrite as:

$Each = \frac{15}{4*32}$

$Each = \frac{15}{128}$

4 0

3 years ago

Had a has a monthly budget for her cell phone bill. Last month she spent 120 percent of her budget , and the bill was $60. What

irga5000 [103]

Answer:

$50

Step-by-step explanation:

120% = 60

100% = x

120x = 6000

x = 6000/120

x = $50

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3 years ago

If 25% of a number is 75 find the number

avanturin [10]

Answer:

x = 300

Step-by-step explanation:

of means multiply and is means equals

25% * x = 75

Change to decimal form

.25x = 75

Divide each side by .25

.25x/.25 = 75/.25

x = 300

8 0

4 years ago

Read 2 more answers

Which shows a correct order to solve this story problem?Peter bought 3 biscuits for $1.59 each and 3 sausages for $2.50 each at

amid [387]

Answer:

Step 1: Calculate the price of 3 biscuits.
Step 2: Calculate the price of 3 sausages.
Step 3: Add the total amounts from Steps 1 and 2 to the amount of the tip.
Step 4: Subtract that total amount from $25.

Step-by-step explanation:

The total amount paid will be the price for 3 biscuits, 3 sausages, and the tip. The change will be the difference between this sum and $25. Choice B is an example of one way this calculation can be done.

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3 years ago