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3 years ago

Out of 100 cars on a used car lot, 20 cars have manual transmissions , 50 cars have air conditioning , and 8 cars have both .

Mathematics

1 answer:

slega [8]3 years ago

3 0

Answer: whats the question?

Step-by-step explanation:

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Which plane figure generates a cylinder when it rotates about the dashed line?

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Answer:

It is a rectangle

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3 years ago

There are 8 trailmix bags in one box. Clarissa buys 5 boxes. She gives an equal number of bags of trailmix to 4 friends. How man

JulsSmile [24]

Each friend receives 2 bags because 4 divided by 8 is 2

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2 years ago

What is 1+1? I wonder if anyone would answer this cause no one seems to see my questions

stealth61 [152]

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3 years ago

Read 2 more answers

Which of the following equations have complex roots?

mestny [16]

Answer:

Step-by-step explanation:

Complex roots of quadratic functions occur when the <u>discriminant is negative</u>.

<u>Discriminant</u>

$b^2-4ac\quad\textsf{when}\:\:ax^2+bx+c=0$

Evaluate the discriminant of each of the given equations.

$\textsf{A.} \quad 3x^2+2=0$

$\implies a=3, \quad b=0, \quad c=2$

$\implies b^2-4ac=0^2-4(3)(2)=-24$

As -24 < 0 the equation will have complex roots.

$\textsf{B.} \quad 2x^2+1=7x$

$\implies 2x^2-7x+1=0$

$\implies a=2, \quad b=-7, \quad c=1$

$\implies b^2-4ac= (-7)^2-4(2)(1)=41$

As 41 > 0 the equation does not have complex roots.

$\textsf{C.} \quad 3x^2-1=6x$

$\implies 3x^2-6x-1=0$

$\implies a=3, \quad b=-6, \quad c=-1$

$\implies b^2-4ac=(-6)^2-4(3)(-1)=48$

As 48 > 0 the equation does not have complex roots.

$\textsf{D.} \quad 2x^2-1=5x$

$\implies 2x^2-5x-1=0$

$\implies a=2, \quad b=-5, \quad c=-1$

$\implies b^2-4ac=(-5)^2-4(2)(-1)=33$

As 33 > 0 the equation does not have complex roots.

Learn more about discriminants here:

brainly.com/question/27444516

brainly.com/question/27869538

Learn more about complex roots here:

brainly.com/question/26344541

6 0

2 years ago

3.75 +(-4)+(-5.25) =

cestrela7 [59]

Answer:

-5.5

Step-by-step explanation:

8 0

3 years ago