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Shkiper50 [21]
3 years ago
8

Let f(x) = 3x2 + x − 3 and g(x) = x2 − 5x + 1. Find f(x) − g(x).

Mathematics
2 answers:
Lubov Fominskaja [6]3 years ago
8 0
       f(x)  -  g(x)
=>  (3x²  +  x  - 3)  -  (x² - 5x + 1)
=>  3x² + x - 3 - x² + 5x - 1
=>  3x² - x² + x + 5x - 3 - 1
=>  2x² + 6x - 4
SVEN [57.7K]3 years ago
7 0
Easy peasy, since equals, just sub

f(x)-g(x)
(3x^2+x-3)-(x^2-5x+1)
distribute invisible -1
3x^2+x-3-x^2+5x-1
rearange terms or group like terms
3x^2-x^2+x+5x-3-1
add like terms
2x^2+6x-4


f(x)-g(x)=2x^2+6x-4
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Answer:

67.97

Step-by-step explanation:

let AC be length of ladder and BC be distance between ladder and wall and angle be theta

Now,

costheta=BC/AC

THETA =COS^-1(3÷8)

THETA=COS^-1(0.375)

THETA=67.97 DEGREE

3 0
2 years ago
Jerome has 1/4 of the group's video games at his house. Mario has 2/5 of the video games at his house. what fraction of the grou
serious [3.7K]

Answer: 13/20 of the video games at both of their houses.


Step-by-step explanation: The equation is 1/4 + 2/5. You need to find their common denominator which is 20, so the equation is now 5/20 + 8/20 = 13/20, which can't be simplified.


6 0
3 years ago
What is an equivalent fraction of 10/12
BARSIC [14]

Answer:

5/6

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Step-by-step explanation:

We can simplify this fraction down further by divide both numerator and denominator by 2:

10/2 = 5

12/2 = 6

5/6 will be equivalent to 10/12

6 0
2 years ago
Read 2 more answers
The General Social Survey asked a large number of people how much time they spent watching TV each day. The mean number of hours
DerKrebs [107]

Answer:

Yes, we can conclude that the population standard deviation of TV watching times for teenagers is less than 2.66

Step-by-step explanation:

H0 : σ² = 2.66²

H1 : σ² < 2.66²

X²c = (n - 1)*s² ÷ σ²

sample size, n = 40

Sample standard deviation, s = 1.9

X²c = ((40 - 1) * 1.9²) ÷ 2.66²

X²c = 140.79 ÷ 7.0756

X²c = 19.897

Using a confidence level of 95%

Degree of freedom, df = n - 1 ; df = 40 - 1 = 39

The critical value using the chi distribution table is 25.6954

Comparing the test statistic with the critical value :

19.897 < 25.6954

Test statistic < Critical value ; Reject the Null

Hence, we can conclude that the population standard deviation of TV watching times for teenagers is less than 2.66

8 0
3 years ago
12
Serjik [45]

Answer:

6.70m/s

Step-by-step explanation:

Speed = distance/time

Given the winner covered a distance of 26m in time of 3.88 seconds

Therefore

Speed = 26/3.88

= 6.70m/s

7 0
3 years ago
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