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3 years ago

PLEASE HELP GIVING BRAINLIEST + 50 POINTS! 2+2 = ? A. 21 B. fish C. All of the above

Mathematics

2 answers:

natali 33 [55]3 years ago

7 0

Answer:

Step-by-step explanation:

nadya68 [22]3 years ago

4 0

Answer:

ALL of the above

Step-by-step explanation:

I'm very positive this is right

on second thought...

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The length of a rectangle is 5 inches more than its width, x. The area of a rectangle can be represented by the equation x 2 + 5

Arada [10]

Answer:

Width = 15 inches Length = 20 inches

Step-by-step explanation:

The area of a rectangle is calculated using the following formula.

$A = Lx$ (1)

Where L is the length and x is the width of the rectangle

In this case we know that the length of the rectangle is 5 inches greater than its width. This means that:

$L = x + 5$ (2)

Also The area of a rectangle can be represented by the equation $x^2 + 5x = 300$

so to find the width x we solve the equation

$x^2 + 5x -300=0$ (3)

For an equation of the form $ax ^ 2 + bx + c = 0$ the quadratic formula is:

$x=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

In this case note that:

$a=1\\b=5\\c=-300$

Then:

$x=\frac{-5\±\sqrt{(5)^2-4(1)(-300)}}{2(1)}$

$x=\frac{-5\±\sqrt{25+1200}}{2}$

$x=\frac{-5\±\sqrt{1225}}{2}$

$x=\frac{-5\±35}{2}$

$x_1=\frac{-5+35}{2}$ → $x_1=15$

$x_2=\frac{-5-35}{2}$ → $x_2=-20$

We take the positive solution $x=15\ in$

Now we use equation (2) to find L

$L = x + 5$

$L = 15 + 5$

$L = 20\ in$

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3 years ago

Emily's bicycle wheel has a diameter of 18 inches. If the wheel makes 20 revolutions, approximately how far will the bicycle hav

Paraphin [41]

Answer:

1131 inches

Step-by-step explanation:

Radius = 18/2 = 9 in

In one revolution,

2 × pi × 9 = 18pi in

In 20 revolutions:

20 × 18pi = 360pi in

1130.973355 in

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2 years ago

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worty [1.4K]

Answer:

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Step-by-step explanation:

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Talja [164]

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3 years ago

HELP ASAP! Will name brainliest!

eimsori [14]

Answer:

mean:8,median:8,mode:8

Step-by-step explanation:

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2 years ago