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tatiyna
2 years ago
13

F(x) = –3x2 – 7x Find f(7)

Mathematics
2 answers:
Dominik [7]2 years ago
7 0

Answer:

ez

Step-by-step explanation:

mel-nik [20]2 years ago
7 0

Answer:

-55

Step-by-step explanation:

f(7)= -3x2- 7(7)

=-6-49

=-55

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Write the quadratic equation that has roots (-1-√2)/3 and (-1+√2)/3 , if it's coefficient with x^2 is equal to
MArishka [77]

9514 1404 393

Answer:

  (a) x² +2/3x -1/9 = 0

  (b) 9x² +6x -1 = 0

Step-by-step explanation:

The product of quadratic factors can be expanded to give ...

  (x -p)(x -q) = x² -(p+q)x +pq

Then the coefficients of x² +bx +c = 0 will be ...

  b = -((-1-√2)/3 +(-1+√2)/3)) = 2/3

  c = ((-1-√2)/3)·((-1+√2)/3) = (-1/3)² -(√2/3)²) = 1/9 -2/9 = -1/9

a) The quadratic with leading coefficient 1 is ...

  x² +2/3x -1/9 = 0

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b) Multiplying that by 9 gives ...

  9x² +6x -1 = 0

3 0
2 years ago
Write each fraction in its simplest form 18/4 and 24/32
hram777 [196]
The fractions in simplest form is
18/4 = 4 1/2
24/32 = 3/4
3 0
3 years ago
Read 2 more answers
I'm a bit confused. Can someone help?
cupoosta [38]

Answer:

the answere is c

Step-by-step explanation:

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5 0
3 years ago
Yoko can type 27 words in 9 minutes.<br> What is her rate in words per minute?
Vika [28.1K]

Answer:

3 words a minute

Step-by-step explanation:

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3 0
3 years ago
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9. A car dealership offers a loan with 4% interest for 48 months, and you plan to purchase a car for $20,000. You can afford a d
Lady bird [3.3K]

SOLUTION

Since you can afford a down payment of $2,500, the remaining money needed to purchase the car becomes

\begin{gathered} 20,000-2,500 \\ =17,500 \end{gathered}

Now, we will find the simple interest on $17,500 for 48 months, which is 4 years. This becomes

\begin{gathered} I=\frac{PRT}{100} \\ I=\frac{17,500\times4\times4}{100} \\ I=2,800\text{ dollars } \end{gathered}

(a) What will your monthly payment be? $

We will add this interest to the $17,500 and divide by 48 months to get the monthly payment. This becomes

\begin{gathered} 17,500+2,800=20,300 \\ \frac{20,300}{48}=422.91666 \\ =422.92 \end{gathered}

Hence, the answer is $422.92

(b) How much will you pay in total for the car? $

To get this, we add the $20,300 (that we divided by 48 months), to the initial down payment made. This becomes

\begin{gathered} 20,300+2500 \\ =22,800 \end{gathered}

Hence, the answer is $22,800

(c) How much will you pay in interest over the life of the loan? $

We have initially found the interest as 2,800 dollars.

Hence the answer is $2,800

4 0
1 year ago
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