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2 years ago

Can you help me please

Mathematics

1 answer:

lora16 [44]2 years ago

7 0

Cos(5/12)=65.4
It won't let me do short anwser

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In town 35% of 15 000 voters did not cast vote in election How many people cast their votes?

natita [175]

Let p = number of people that cast their vote.

p = 0.35(15, 000)

p = 5,250

7 0

3 years ago

Find the value of the missing variables. all figures are kites

icang [17]

I believe that the answer is C. x - 114 : y - 34

7 0

3 years ago

The length of a side of a triangle is 26 in. A line, parallel to the given side ,divides the triangle into 2 parts of equal area

lubasha [3.4K]

Answer:

13√2

Step-by-step explanation:

The areas of the larger triangle, and the smaller triangle (formed when the larger triangle was cut by the parallel line) are similar. Therefore we can compare their areas:

Area1/Area2 = (Length1)^2/(Length2)^2,

x/2x = (Length1)^2/(26)^2,

1/2 = (Length1)^2/676,

(Length1)^2 = 676/2 = 338

Length1 = √1352 = 13√2

6 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:

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

The sides of the room have to be x=10 feet.

The height can be calculated as:

$y=875/x^2=875/(10^2)=875/100=8.75$

The room will have sides of 10 feet and a height of 8.75 feet.

4 0

3 years ago

Sarah was thinking of a number. Sarah subtracts 1.7 from the number and gets an answer of 14. Form an equation with x from the i

Svetradugi [14.3K]

Answer:

x - 1.7 = 14

Step-by-step explanation:

Sarah thought of a number: x

Then she subtracted 1.7 FROM it: x - 1.7

and gets an answer if 14: x - 1.7 = 14

so the equation is x - 1.7 = 14

4 0

2 years ago

Can you help me please ​

Can you help me please