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3 years ago

The expression 2x^2+10x-28/4x+28 is undefined when x is

Mathematics

1 answer:

barxatty [35]3 years ago

3 0

Answer:

-7

Step-by-step explanation:

4(-7)+28 =0

2x^2+10x-28/0 = undefined

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If r = 9, b = 5, and g= −6, what does (r + b − g)(b + g) equal?

r-ruslan [8.4K]

Answer:

-20

Step-by-step explanation:

(r + b − g)(b + g)

we have fom statement:

r = 9

b = 5

g= −6

so we have:

(r + b − g)(b + g)= (9+5-(-6))*(5+(-6))

(r + b − g)(b + g)= (14+6)*(-1)

(r + b − g)(b + g)= -20

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3 years ago

steve and scott are twins out for a morning jog. They run at the exact same speed They split at a corner one north, one east. On

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Their running paths form the legs of an isosceles right triangle. The hypotenuse of such a triangle (the distance between Steve and Scott) is √2 times the length of one leg. Each has run 10 miles in the hour since they split.

They are running at 10 miles per hour.

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3 years ago

In 7th grade there are 58 students with red-hair and 609 students with another color hair. The numbers of red-haired students in

mr_godi [17]

In 7th grade:

red-hair students =58

another color hair students =609

In 8th grade:

red-hair students =60

Let's assume

another color hair students =x

now, we are given

The numbers of red-haired students in 8th grade are proportional to the numbers in 7th

so,

$\frac{60}{58} =\frac{x}{609}$

now, we can solve for x

we get

$x=609*\frac{60}{58}$

we get

$x=630$

so, students have another color hair in 8th grade is 630.........Answer

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3 years ago

At a time denoted ast = 0a technological innovation is introduced into a community that has a fixed population of n people. Dete

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Answer and Explanation:

He rate at which the innovation spread through the community is the number of people proportional to the people adopted it and the people who don't adopted it as constant of proportionality is k , and the fixed population of the community is n.

Suppose

Number of people who have adopted innovation at time t = x (t)

Number of people who don’t adopted innovation at time t = n – x (t)

Then the differential equation is:

dx/dt = kx (n-x), k > 0

Where k is the constant of proportionality.

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3 years ago

Graph each absolute value function. State the domain, range, and y-intercept.

serg [7]

Answer:

i)D: $x\in R$