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Alchen [17]
3 years ago
5

If f(x) = - 2x2 + 2x - 3, what is f(5)? A) -93 B) -43 C) -28 D) - 43/5

Mathematics
1 answer:
andrew-mc [135]3 years ago
8 0

Answer:

The answer to your question is letter B

Step-by-step explanation:

Process

1.- Write the function

                                 f(x) = - 2x² + 2x - 3

Find f(5)

2.- Substitute x for 5

                                f(5) = -2(5)⁵ + 2(5) - 3

3.- Simplify

                                f(5) = -2(25) + 10 - 3

                                f(5) = -50 + 7

                                f(5) = -43

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A principal of $4,570 is placed in an account that earns 4. 5% interest. If the interest is compounded annually, how much money
iVinArrow [24]

~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$4570\\ r=rate\to 4.5\%\to \frac{4.5}{100}\dotfill &0.045\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{annually, thus once} \end{array}\dotfill &1\\ t=years\dotfill &5 \end{cases} \\\\\\ A=4570\left(1+\frac{0.045}{1}\right)^{1\cdot 5}\implies A=4570(1.045)^5\implies A\approx 5695.05

8 0
3 years ago
Find the length of the line segment that connects the points (7, 16) and (47, 140)​
tresset_1 [31]

Answer:

length =  \sqrt{ {(47 - 7)}^{2}  +  {(140 - 16)}^{2} }  \\  =  \sqrt{ {40}^{2}  +  {124}^{2} }  \\  =  \sqrt{16976}  \\  = 130.29 \: units

6 0
3 years ago
Find the area and the circumference of a circle with diameter 8 cm. Use the value 3.14 for π , and do not round your answers. Be
Illusion [34]

Answer:

Area= 50.24 squared cm.

Circumference= 25.12 cm.

Step-by-step explanation:

To find the area of a circle- A= 3.14*(4 cm squared). ( The 4 cm is your radius. Half of the diameter.) After you square your radius you get 16cm squared. You then go onto multiply the 16 cm squared by 3.14 to get 50.24 cm squared.

To find the circumference of a circle- C= 2*(3.14)*(4cm). (Again the 4cm is your radius. Half of the diameter.) After you multiply the 2 and 3.14 you get 6.28. You then multiply the 6.28 by 4 cm to get 25.12 cm.

7 0
3 years ago
Anmol got 60 marks out of 80 marks in mathematics what percent marks did he get​
Kay [80]

Answer:

75%

Step-by-Step Explanation:

There are two ways to go about this.

1) We can simply put it as a fraction = 60/80.

  Then since a fraction sign also means division, we divide 60 by 80 = 0.75

  Then to change a decimal into a percentage, we multiply by 100% = 75%

  So our answer is 75%

2) We can simply it after it is put into a fraction = 60/80 = 3/4

   It should be common knowledge that 3/4 is 75% depending on what                 grade you are in.

But there you have it, whichever way you prefer, the answer is always 75%.

3 0
3 years ago
Whats 21 3/4 ÷ 2 1/2 = ???
galben [10]
The answer is 8.7, or 8 (7/10).
8 0
3 years ago
Read 2 more answers
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