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3 years ago

What is the perimeter of a rectangle with a length of 7 3/4 inches and a width of 4 1/3 inches

Mathematics

2 answers:

trasher [3.6K]3 years ago

6 0

Multiply the length by 2, then multiply the width by 2 and then add them together.

7 3/4 x 2 = 15 1/2

4 1/3 x 2 = 8 2/3

15 1/2 = 31/2

8 2/3 = 26/3

Find common denominator:

31/2 x 3 = 93/6

26/3 x 2 = 52/6

93/6 + 52/6 = 145/6

145/6 = 24 1/6 inches.

MrMuchimi3 years ago

3 0

Answer:

24 1/6 or 145/6 inches

Step-by-step explanation:

( 7 3/4 inches x 2) + (4 1/3 inches x 2)= 145/6 which is 24 1/6

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3(x+2) < 10 //// that should be right!!

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HURRYYYYYYYYY!! What is the equation of the quadratic function with a vertex at (2, 25) and an x-intercept at (7,0)?

tangare [24]

Answer:

$y=-(x-7)(x+3)$

which is none of the choices provided.

Are you sure the question is right or even the choices?

You can even write it as:

$y=-(x+3)(x-7)$ but this is still not a choice.

Step-by-step explanation:

The vertex form of a quadratic is $y=a(x-h)^2+k$ .

This is called vertex form because it gives you the vertex is $(h,k)$ .

We are given that $(h,k)=(2,25)$ which makes our equation:

$y=a(x-2)^2+25$ .

We can find the value of $a$ by plugging in the x-intercept (7,0) for $(x,y)$ into:

$y=a(x-2)^2+25$

$0=a(7-2)^2+25$

$0=a(5)^2+25$

Subtract 25 on both sides:

$-25=a(5)^2$

$-25=a(25)$

Divide both sides by 25:

$\frac{-25}{25}=a$

$-1=a$ .

So the equation for the quadratic is:

$y=-1(x-2)^2+25$

Let's put this into factored form since all the choices are in factored form.

This will require us to multiply the (x-2)(x-2) out:

$y=-1(x-2)(x-2)+25$

$y=-1(x^2-2x-2x+4)+25$

$y=-1(x^2-4x+4)+25$

$y=-x^2+4x-4+25$

$y=-x^2+4x+21$

Factor out -1:

$y=-(x^2-4x-21)$

WE need to find two numbers that multiply to be -21 and add to be -4:

$y=-(x-7)(x+3)$

8 0

3 years ago

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Find the area of a circle with a diameter of 14 meters. Round your answer to the nearest hundredth of a square meter.

Jlenok [28]

To find the area of the circle:

⇒ need to know the formula: $\pi r^{2}$

r: radius or half of diameter's length ⇒ 7 meters

Let's calculate:

$Area = \pi (7)^2=49\pi =153.9380m^3$

The problem asks us to round to the nearest hundreth:

$Area = 153.94m^3$

Answer: $153.94m^3$

Hope that helps!

4 0

1 year ago

<img src="https://tex.z-dn.net/?f=9%5Ctimes%2010%5Ctimes%209%3D" id="TexFormula1" title="9\times 10\times 9=" alt="9\times 10\ti

Vadim26 [7]

Answer:

810

Step-by-step explanation:

9 x 10 = 90

9 x 90= 810

PLZ MARK BRAINLIEST!

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2 years ago

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