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Thepotemich [5.8K]
2 years ago
5

Use Polynomials to Find Perimeter & Area Find the area of this rectangle.

Mathematics
1 answer:
Ostrovityanka [42]2 years ago
8 0

Answer:

Area of rectangle =

l \times b

= 5x *( 5x -4)

=

{25x}^{2}  - 20x

Perimeter of rectangle = 2(l + b)

=2(5x +5x -4)

= 2(10x - 4)

= 20x - 8

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Work out the size of angle a
satela [25.4K]

Answer:thre

Step-by-step explanation:

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3 years ago
You conduct a quality check after running 350 parts 49 of the parts do not need this specifications what percent of the parts do
zepelin [54]

Answer:

14%

Step-by-step explanation:

<em><u>49 parts of 350 parts</u></em> do not need specifications...

= 49/350

So, 49/350 = x/100

= <u>49(100) = 350x</u>

= 4900 = 350x

= 4900/350 = x

x = 14%

6 0
3 years ago
A school psychologist is interested in determining if children with attention deficit disorder (ADD) learn better if English lit
boyakko [2]

Answer:

The answer is "Option a"

Step-by-step explanation:

The Rejecting or the null hypothesis is refused by the refuting were used when the significance for our data analysis is less than the cut-off points, for example, either 0.05 or 0.01, therefore reject the null accept the alternative hypothesis, that's why in this question, the first choice is correct.

7 0
3 years ago
Solve -2/3 and x- intercept 5
lions [1.4K]

Answer:

y= -2/3x+10

Step-by-step explanation:

-2/3=slope, x-intercept=5 = (5,0)

formula is y-y1=m(x-x1)

(5,0) ---> 5=x1 0=y1

y-0= -2/3(x-5)

y-0= -2/3x+10

+0           +0

y= -2/3x+10

7 0
3 years ago
A 24-centimeter by 119-centimeter piece of cardboard is used to make an open-top box by removing a square from each corner of th
satela [25.4K]

Answer:

The size square removed from each corner = 32.15 cm²

Step-by-step explanation:

The volume of the box = Length * Breadth * Height

Let r be the size  removed from each corner

Note that at maximum volume, \frac{dV}{dr} = 0

The original length of the cardboard is 119 cm, if you remove a  size of r (This typically will be the height of the box)  from the corner, since there are two corners corresponding to the length of the box, the length of the box will be:

Length, L = 119 - 2r

Similarly for the breadth, B = 24 - 2r

And the height as stated earlier, H = r

Volume, V = L*B*H

V = (119-2r)(24-2r)r

V = r(2856 - 238r - 48r + 4r²)

V = 4r³ - 286r² + 2856r

At maximum volume dV/dr = 0

dV/dr = 12r² - 572r + 2856

12r² - 572r + 2856 = 0

By solving the quadratic equation above for the value of r:

r = 5.67 or 42

r cannot be 42 because the  size removed from the corner of the cardboard cannot be more than the width of the cardboard.

Note that the area of a square is r²

Therefore, the size square removed from each corner = 5.67² = 32.15 cm²

5 0
3 years ago
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