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Andru [333]
3 years ago
15

Solve ^3/x^2-8=2 pls help

Mathematics
1 answer:
Serggg [28]3 years ago
4 0

Answer:

its the first one

Step-by-step explanation:

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The area of a rectangle is 45 cm2. Two squares are constructed such that two adjacent sides of the rectangle are each also the s
Zielflug [23.3K]

Answer:

The lengths of sides of squares are 5 cm and 9 cm.

Step-by-step explanation:

Let the sides of rectangle be x and y .

Area of rectangle = Length × Breadth

Given : Area of rectangle = 45 cm².

⇒ x × y  = 45  

⇒ x=\frac{45}{y}  ........(1)

Two squares are constructed such that two adjacent sides of the rectangle

so squares have side x and y .

Area of square = side × side

Area of square with side x = x²

Area of square with side y = y²

Also, The combined area of the two squares is 106 cm².

⇒ x² + y² = 106

From (1) put value of x , we get,

(\frac{45}{y})^2+y^2=106

Solving for y ,

(\frac{45}{y})^2+y^2=106  

2025+y^4=106y^2  

y^4-106y^2+2025=0  

y^4-81y^2-25y^2+2025=0  

y^2(y^2-81)-25(y^2-81)=0  

(y^2-25)(y^2-81)=0

y^2-81=0 or y^2-25=0    

on solving we get y = 5 and y = 9

Also, x can be find by putting in (1),

⇒ x=\frac{45}{5}=9 and ⇒ x=\frac{45}{9}=5  

⇒ x = 9 and x = 5

Thus, lengths of sides of squares are 5 cm and 9 cm.

6 0
4 years ago
Read 2 more answers
Find the side of an equilateral triangle if its area is 25√3 cm2
Sever21 [200]

Answer:

10

Step-by-step explanation:

area=√3/4×a^2

100√3 = √3×a^2

a^2 = 100

a=10

side = 10

4 0
3 years ago
Expand and combine like terms.<br> (4b^2+ 3) (4b^2- 3) =
nasty-shy [4]
I guess this is the answer.

6 0
3 years ago
Write an<br> explicit formula for an, the nth term of the sequence 39, 43, 47, ....
Inga [223]

9514 1404 393

Answer:

  an = 39 +4(n -1)

Step-by-step explanation:

The formula for the general term of an arithmetic sequence is ...

  an = a1 +d(n -1)

Here, the sequence has first term a1 = 39 and common difference d = 43-39 = 4. So, the general term is ...

  an = 39 +4(n -1)

3 0
3 years ago
What is the surface area of this cylinder?
natali 33 [55]

Answer:

75.4

Step-by-step explanation:

A=2πrh+2πr2=2·π·2·4+2·π·22≈75.39822

5 0
3 years ago
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