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devlian [24]
3 years ago
12

The mechanic does 6 oil changes 2 hours. How many oil changes can the mechanic do in 8 hours?

Mathematics
1 answer:
gayaneshka [121]3 years ago
8 0

Answer:

24

Step-by-step explanation:

6/2 = x/8

x=24

24 oil changes

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Explain whether or not the plant labeled p(x)=x2+x+3 has any rational or irrational roots.
olasank [31]

frational roots are those numbers that can be written in form \frac{a}{b} where a and b are integers (integers are like -5,-4,-3,-2,-1,0,1,2,3,4, etc)

some examples are 1=1/1, 2=2/2, -4=-4/1, 4/3, 0.111111111111=1/9, etc

irrational numbers are numbers that can't be written that way like pi

numbers that involve √-1 or a square root of any negative number are called complex numbers and are neither rational nor irrational.


roots are the values of x that makes the function equal to 0


p(x)=x^2+x+3

set equal to 0

0=x^2+x+3

I can't factor so use quadratic formula

for 0=ax^2+bx+c

x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}

so

x=\frac{-1 \pm \sqrt{1^2-4(1)(3)}}{2(1)}

x=\frac{-1 \pm \sqrt{-11}}{2}

√-11 is a square root of a negative number so it is a complex number. therefore, the function does not have rational or irrational roots


p(x) has no rational or irrational roots

5 0
3 years ago
Given that f(x) = x2 + 2x + 3 and g(x) = quantity of x plus four, over three , solve for f(g(x)) when x = 2.
Sidana [21]
f(x)=x^2+2x+3
g(x)=\frac{x+4}{3}
f(g(x))=(\frac{x+4}{3})^2+2(\frac{x+4}{3})+3
f(g(x))=\frac{x^2+8x+16}{9}+\frac{2x+8}{3}+3
f(g(2))=\frac{2^2+8(2)+16}{9}+\frac{2(2)+8}{3}+3
f(g(2))+\frac{4+16+16}{9}+\frac{4+8}{3}+3
f(g(2))=\frac{36}{9}+\frac{12}{3}+3
f(g(2))=4+4+3
f(g(2)=11

Check:
g(2)=(2+4)/3=2
f(2)=2^2+2(2)+3=4+4+3=11  Checks. 
4 0
3 years ago
Read 2 more answers
Nicolas bought a map of the city uses a scale of 1 inch to 8 miles Nickolas his house and school are 1 1 over 2 inches apart on
Nikolay [14]

Answer:

What is the question

Step-by-step explanation:

4 0
3 years ago
Show work ! please !!!!!!
Law Incorporation [45]

Sin A =  opp/hyp = 4/5

Cos A = adj/hyp =  3/5

Tan A = opp/adj =  4/3

Cos 27 = 0.8910065...  --> 0.89

You can just plug that into your graphing calculator, just make sure the degree mode is on.

3 0
3 years ago
How many different primes are in the prime factorization of 65529009
Tems11 [23]

Answer:

6 different primes.

3, 7, 13, 29, 31 , 89.

Step-by-step explanation:

Try dividing by primes starting with 3:

3 ) 65529009

3 )  21843003

7)  7281001

13)  1040143

29)  80011

31 (  2759

             89.   89 is a prime number.

7 0
3 years ago
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