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3 years ago

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terry ate 4 less cookies than jack. alvin ate four times as many cookies as terry. if x represents the number if cookies that ja

ke ate, what could represent the number of cookies that alvin ate ?

1 answer:

Ierofanga [76]3 years ago

7 0

Answer:

Alivin= 4(x-4)

Step-by-step explanation:

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A circle has a center of (5,-5) and goes through (6,-2). What is the radius?

Fittoniya [83]

Start with the equation of a circle whose center is at (h,k) and whose radius is r:

(x-h)^2 + (y-k)^2 = r^2

Substituting the given coordinates of the center:

(x-5)^2 + (y-[-5])^2 = r^2, or (x-5)^2 + (y+5)^2 = r^2

Substituding the given coordinates of a point (6,-2) on the circle:

(6-5)^2 + (-2+5)^2 = r^2

Simplifying:

1^2 + 3^2 = r^2, or 1 + 9 = r^2, or 10= r^2. Then r = sqrt(10).

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3 years ago

Which of the following best describes the expression 12(X+3)

nydimaria [60]

Answer: 12x+36

Step-by-step explanation:

If you use distributive property, 12 x X is 12x and 12 x 3 is 36 so you get 12x+36

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4 years ago

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Who is faster? A girl who runs 200 meters in 28 seconds or her friend who runs 400 meters in 60 seconds? H.E.L.P

blagie [28]

Answer: The girl herself ran faster than her friend.

Step-by-step explanation:

This answer, of course assumes a lot of variables, but for the sake of keeping things simple, lets assume the following, the people are ran in a "straight line" with no "obstacles" in their way, and ran on the same track.

Calculating in meters-per-second for the girl who ran 200 meters in 28 seconds, you get 7.14285714286 meters per second

Calculating in meters-per-second for the girl who ran 400 meters in 60 seconds, you get 6.66666666667 meters per second

Comparing the two results, it can be "accurately" concluded that the girl herself ran faster than her friend under the following assumptions earlier stated.

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4 years ago

A cable company wants to provide cell phone service for residents on an island. The function for the cost of laying the cable fr

laila [671]

Answer:

C) domain: all real numbers greater than or equal to 0

range: all real numbers greater than or equal to 13,000

Step-by-step explanation:

We have, the function for the cost of laying cable is given by,

$c(x)= 6500\sqrt{x^2+4}$ , where x is the length of the cable (in feet).

As, 'x' represents the length of the cable.

We have that, the value of x cannot be negative.

So, x ≥ 0.

Since, the domain of $c(x)= 6500\sqrt{x^2+4}$ is the set of points where $x^2+4\geq 0$ and we have that x ≥ 0.

Thus, the domain is 'Set of all real numbers greater than or equal to 0'.

Now, we substitute x= 0 in $c(x)= 6500\sqrt{x^2+4}$ .

i.e. $c(0)= 6500\sqrt{0^2+4}$

i.e. $c(0)= 6500\sqrt{4}$

i.e. $c(0)= 6500\times 2$

i.e. c(0) = 13000.

So, we get that the vertex point of the function is (0,13000).

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Do the following scenarios model the equation y=2x+5

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Answer:

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Step-by-step explanation:

Hope this helped :)

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3 years ago