3 years ago

For the function: f(x) = 21 + 2x − 5x2 Find f(3)

1 answer:

6 0

F(3)=-18

You just replace x for three for your equation and then use Ofer of operations to solve it.

So f(3)= 21+ 2(3)-5(3)^2

The exponent goes first: f(3)= 21+ 2(3)-5(9)

Next is multiplication: f(3)= 21+ 6-45

Now add: f(3)= 27-45

Finally subtract: f(3)= -18

Hope this helps!

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A man deposited $ 800 in his account at a bank which offers 6% simple interest per annum. How much interest would he receive on

strojnjashka [21]

Answer:

The answer is Rs.43,200.

5 0

3 years ago

C=wtc/1000 solve for w

Nutka1998 [239]

For this case we have the following equation:
$C = \frac{wtc}{1000}$
To clear w, we must follow the following steps:
1) The value of t multiplied by c pass to divide the other side of the equation:
$\frac{w}{1000} = \frac{C}{tc}$
2) the value of 1000 is passed to multiply to the other side of the equation:
$w = \frac{1000C}{tc}$
Answer:
The cleared equation for w is:
$w = \frac{1000C}{tc}$

3 0

3 years ago

Read 2 more answers

Tewanda read 2,000 word news article in 8 minutes. How fast did she read the news article? Explain how you found your answer.

Blababa [14]

Answer:

She read 250 words per minute.

Step-by-step explanation:

Simply divide the words read by the time took to read that amount = (2000/8) words per minute = 250 words per minute.

Hope this helped!

6 0

3 years ago

Pls pls answer this asap no wrong answers pls

klemol [59]

Answer:

20, increased, Bianca

Step-by-step explanation:

First one:

He is shown to have travelled 20km in 1 hour, so that's 20km/h.

Second:

The gradient is how steep the curve is, the steeper the faster the person is travelling. Due to the fact Bianca's curve becomes steeper, it shows she is travelling faster. Therefore, her running speed increases.

Third:

Bianca's line hits 50km before Alberto, so therefore she finished first.

Let me know if this makes sense, hope it helped! :D

6 0

3 years ago

If you multiply 5 and then blank and it equals 565 what the missing number?

mel-nik [20]

It would be 113 because 5x113 would equal 565

3 0

3 years ago