All categories

3 years ago

Please help me! DO NOT SEND LINK!

Mathematics

2 answers:

azamat3 years ago

4 0

The area of the rectangle is 40 cm.
To find this, just multiply 8 and 5.
Area: length times width
Area: 8 times 5
Area: 40 cm

The perimeter of the rectangle is 26 cm.
Perimeter: 2L + 2W
Perimeter: 2(8) + 2(5)
Perimeter: 16 + 10
Perimeter: 26
Hope this helps!

Arte-miy333 [17]3 years ago

3 0

Answer:

Area is 40

perimeter is 26

Step-by-step explanation:

area = l×w

$8 \times 5 = 40$

Perimeter = 2L +2W

$2 \times 8 + 2 \times 5 \\ 16 + 10 \\ 26$

You might be interested in

3/5 ÷ 4/5 = ??? A. 3/4 B. 2/5 C. 7/9

Ahat [919]

Answer:

Option A

Step-by-step explanation:

⅗ ÷ ⅘

⅗ × 5/4

= 3/4

<h2>HOPE IT HELPS</h2>

6 0

2 years ago

Read 2 more answers

If 25^x+1 = 125/5^x find the value of x

storchak [24]

Answer:

x =1/3

Step-by-step explanation:

25ˣ⁺¹ = 125/5ˣ

5²⁽ˣ⁺¹⁾ = 5³/5ˣ

5²⁽ˣ⁺¹⁾ = 5³ : 5ˣ

5²⁽ˣ⁺¹⁾ = 5³⁻ˣ

2(x + 1) = 3 - x

2x + 2 = 3 - x

2x + x = 3 - 2

3x = 1

x = 1/3

8 0

2 years ago

A home improvement contractor is painting the walls and ceiling of a rectangular room. The volume of the room is 875.00 cubic fe

Reika [66]

Answer:

The room dimensions for a minimum cost are: sides of 10 feet and height of 8.75 feet.

Step-by-step explanation:

We have a rectangular room with sides x and height y.

The volume of the room is 875 cubic feet, and can be expressed as:

$V=x^2y=875$

With this equation we can define y in function of x as:

$x^2y=875\\\\y=\dfrac{875}{x^2}$

The cost of wall paint is $0.08 per square foot. We have 4 walls which have an area Aw:

$A_w=xy=x\cdot \dfrac{875}{x^2}=\dfrac{875}{x}$

The cost of ceiling paint is $0.14 per square foot. We have only one ceiling with an area:

$A_c=x^2$

We can express the total cost of painting as:

$C=0.08\cdot (4\cdot A_w)+0.14\cdot A_c\\\\C=0.08\cdot (4\cdot \dfrac{875}{x})+0.14\cdot x^2\\\\\\C=\dfrac{280}{x}+0.14x^2$

To calculate the minimum cost, we derive this function C and equal to zero:

$\dfrac{dC}{dx}=280(-1)\dfrac{1}{x^2}+0.14(2x)=0\\\\\\-\dfrac{280}{x^2}+0.28x=0\\\\\\0.28x=\dfrac{280}{x^2}\\\\\\x^3=\dfrac{280}{0.28}=1000\\\\\\x=\sqrt[3]{1000} =10$