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saul85 [17]
3 years ago
15

The length of a rectangle is equal to three times its width. If the perimeter is equal to 96

Mathematics
1 answer:
telo118 [61]3 years ago
8 0

Answer:the length of the rectangle is 36 feet

Step-by-step explanation:

Let L represent the length of the rectangle.

Let W represent the width of the rectangle.

The length of a rectangle is equal to three times its width. This means that

L = 3W

The formula for determining the perimeter of a rectangle is expressed as

Perimeter = 2(L + W)

If the perimeter is equal to 96

feet, it means that

2(L + W) = 96

L + W = 96/2 = 48

Substituting L = 3W into L + W = 48, it becomes

3W + W = 48,

4W = 48

W = 48/4 = 12

L = 3W = 3 × 12 = 36

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Need help on these, thank you!
tensa zangetsu [6.8K]

Answer:

5x+2 , 2x^2+5x-2,\frac{x^2+5x}{2-x^2}

Step-by-step explanation:

We are given f(x) and g(x)

1. (f+g)(x)

(f+g)(x) = f(x) + g(x)

           = x^2+5x+2-x^2

           = 5x+2

Domain : All real numbers as it there exists a value of (f+g)(x) f every x .

2. (f-g)(x)

(f-g)(x) = f(x)-g(x)

          = x^2+5x-2+x^2

          =2x^2+5x-2

Domain : All real numbers as it there exists a value of (f-g)(x) f every x .

Part 3 .

(\frac{f}{g})(x)\\(\frac{f}{g})(x) = \frac{f(x)}{g(x)}\\=\frac{x^2+5x}{2-x^2}

Domain : In this case we see that the function is not defined for values of x for which the denominator becomes 0 or less than zero . Hence only those values of x are defined for which

2-x^2>0

or 2>x^2

   Hence taking square roots on both sides and solving inequality we get.

-\sqrt{2}

8 0
4 years ago
A family has five children. the probability of having a girl is 1/2. what is the probability of having at least 4 girls?
mote1985 [20]
The probability of having at least 4 girls is 0.1875.
6 0
3 years ago
Help please! I dont understand this, and ive been trying for a while now but i cant figure it out
Gemiola [76]

OK, f is the graph and g is the table.

f(-2) > g(-2)

f(-2) means the y coordinate of the graph when x=-2.  That's y=2, so f(-2)=2

g(-2) we look up in the table, g(-2)=1

So it's true that f(-2) > g(-2)

Answer: f(-2) > g(-2)   TRUE

-----

The characteristic of an absolute value function, possibly shifted and scaled, is the distinct V shape.   Clearly f is an absolute value function; the slopes are -1 and 1 and the vertex is at (-3,1) so f(x) = |x+3|+1

g kinda also has the characteristic V shape, but it has a slope of -3  in one place and -1 in the other, so it isn't a straight line.

Answer: f(x) and g(x) are absolute value functions.   FALSE

-----

For all x, f(x) > g(x)

Presumably this means for all x in g's domain, which is only five points.  We already checked x=-2; let's do the rest.

f(-5) = 3, g(-5) = 4

So at x=-5 it's not true

For all x, f(x) > g(x)   FALSE

-----

f(x) and g(x) intersect at exactly two points.

We already know they don't at x=-5 and x=-2.  Let's check the other three.

f(-5) = 3, g(-5) = 4

f(-4) = 2,  g(-4)=1

f(-3) = 1, g(-3) = 0

f(-2) = 2, g(-2) = 1

f(-1) = 3, g(-1) = 4

This one's tricky.   All we really know about g is the points listed.   g may be a parabola where the function is continuous between the table points.   If that's true the functions intersect at exactly two points.  We don't really know that for sure so I'll go with:

Answer: f(x) and g(x) intersect at exactly two points.  FALSE

I may be marked wrong on this last one but I'm sticking with my answer.

7 0
3 years ago
Read 2 more answers
If this is true then what does K equal to? Write as an inequality. plz help me. you will be greatly appreciated.
Scrat [10]

Answer:

K = (2v)/2

Step-by-step explanation:

1. Multiply both sides by 2/n

<u>Now: (2v)/n = b + K</u>

<u></u>

2. Subtract k from both sides

<u>Now: (2v)/n - b = K</u>

8 0
3 years ago
Solve for b.<br> r=9(b+1)
telo118 [61]

Answer:

b=r-9/9

Step-by-step explanation:

First you do the distributive property...

r=9b+9

then you subtract the 9

r-9=9b

then you divide the 9

r-9/9=b

and because of the symetry property you can flip it...

b=r-9/9

4 0
3 years ago
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