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3 years ago

How do you work out percentages

2 answers:

7 0

Firstly, you must divide the subject total by 100. This will give you 1% of your subject. For example, if you are working out 10% of 4,500, divide 4,500 by 100 and you will have worked out 1% of 4,500---in this case, 45. Multiply your 1% answer by the percentage you wish to find out.

Shkiper50 [21]3 years ago

3 0

You take the decimal of say .48 and pull the it back so it would be 48%

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Question 4

PIT_PIT [208]

Answer:

C = 23.5 in

Step-by-step explanation:

θ = 43°

The length of the side opposite to θ = 16 in.

Hypotenuse = DK

Apply trigonometric ratio, thus:

sin(θ) = opp/hyp

Plug in the values

sin 43 = 16/DK

Multiply both sides by DK

DK*sin 43 = 16

Divide both sides by sin 43

DK = 16/sin 43

DK = 23.5 (nearest tenth of an inch)

5 0

3 years ago

Can anyone please help me with this?

kotykmax [81]

$y^4+12y^2+36=(y^2)^2+12y^2+36\\\\\text{substitute}\ y^2=t\\\\t^2+12t+36=t^2+2\cdot t\cdot6+6^2\leftarrow\text{It's a perfect square}\\\\\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\=(t+6)^2=(t+6)(t+6)\\\\\text{we're going back to substitution}\\\\=(y^2+6)(y^2+6)\\\\(\sqrt6)^2=6\to(i\sqrt6)^2=-6\\\\\text{therefore}\\\\=(y^2-(i\sqrt6)^2)(y^2-(i\sqrt6)^2)\\\\\text{use}\ a^2-b^2=(a-b)(a+b)\\\\=\boxed{(y-i\sqrt6)(y+i\sqrt6)(y-i\sqrt6)(y+i\sqrt6)}$

6 0

4 years ago

Billy charges $15 to mow a yard. He needs at least $200 for the new bicycle that he wants. Write and solve an inequality to find

Marta_Voda [28]

He has to mow 14 yard to get at least 200 but he will have 10 extra dollars.

3 0

4 years ago

Read 2 more answers

How do I find the perimeter of a triangle with sides 3ft 8in., 2ft 10in., and 4 ft?

Dmitriy789 [7]

Formula for triangle perimeter is: a + b + c. In this scenario we have:

a = 3 feet 8 inches
b = 2 feet 10 inches
c = 4 feet

a + b + c =
= 3 ft + 8 in + 2 ft + 10 in + 4 ft =
= 9 ft + 18 in

We know that 1 foot is 12 inches, so we can simplify the result to this form:

10 ft + 6 in

or:

<u>10.5 feet</u>

4 0

3 years ago

Find the distance between R(–1, 1) and S(–4, –5) to the nearest tenth.

Bond [772]

$\text{The formula of a distance between two points}\\\\A(x_A;\ y_A);\ B(x_B;\ y_B)\\\\|AB|=\sqrt{(x_B-x_A)^2+(y_B-y_A)^2}\\\\\text{We have}\ R(-1;\ 1);\ S(-4;\ -5)\\\\\text{substitute}\\\\|RS|=\sqrt{(-4-(-1))^2+(-5-1)^2}=\sqrt{(-3)^2+(-6)^2}\\\\=\sqrt{9+36}=\sqrt{45}\approx6.7\\\\\text{Answer: 6.7}$

7 0

3 years ago