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Katen [24]
2 years ago
13

My assignment says The perimeter of a rectangle is 30 cm.

Mathematics
1 answer:
ale4655 [162]2 years ago
6 0
Let side be "a" cm. So another side is (30-2a)/2=15-a
S=ab=a(15-a)=15a-a^2 - parabola
maximum when  a =  -15/-2=7.5 cm 
When a=7.5 all sides are 7.5 cm 
So it's a square. S=a*a=7.5*7.5=56.25 cm^2 - max
There is no global minimun for S.(look at the graphic)

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The price of a technology stock was $9.66 yesterday. Today, the price fell to $9.55. Find the percentage decrease.
Fittoniya [83]
So the decrees would be 0.11 because if you add 9.55 with 0.11 you would get 9.66 then to make sure it’s right you subtract 9.66 by 0.11 and you would get 9.55. So the answer is 0.11
7 0
2 years ago
J/4 - 1 = 1.7 solve for j ​
Andrew [12]

Answer:

j=10.8

Step-by-step explanation:

First, you want to get rid of that 1, so to do that, you add 1 to each side, so you have j/4=2.7. Next, to get rid of the division, you need to multiply by 4 instead, so if you multiply each side by 4 to cancel out the division, you're left with j=10.8

3 0
2 years ago
How to solve this and explain
Goryan [66]
You first wanna find <BAD, because if AB is perpendicular to AC, then it has to form a 90 degree angle. So 90-56=34 degrees. So now you have a 34 & 63 degrees in the ABD triangle. In a triangle, all angles add up to equal 180 degrees. So 34+63+x=180...and x=83. So <ADB= 83 degrees. Now you want to find angle ADC...which you can just subtract 83 from 180 (because <ADB & <ADC forms 180 degree angle). You will then get 97 as angle ADC. So, the same thing as before, add up 56+97+x=180, because all angles (in the triangle ADC) add up to be 180 degrees. X will then equal 27 degrees. Angle ACB= 27 degrees.
5 0
3 years ago
The formula for the volume of a cylinder is v= 3.14r^2h. A cylinder has a volume of 300x feet ^3 and a radius of 5 feet
Fudgin [204]

Answer:

Height = 3.82

Step-by-step explanation:

(3.14)(5)²

(3.14)(25)

= 78.5

300 = 78.5h

300/78.5 = 78.5h/78.5

h = 3.821656051 or approximately 3.82

7 0
2 years ago
How many repeating digits are in <br><br> 1<br> 2<br> 3<br> 4
Alina [70]

Answer:

infinite

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
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