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3 years ago

Solve the system: x - y = 5 4x – 5 y =17

Mathematics

1 answer:

diamong [38]3 years ago

8 0

Answer:

8,3

Step-by-step explanation:

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Edgar earned $9 for every 2 boxes of candy he sold for his school's fundraiser. At that rate, how much would

Eddi Din [679]

Answer:

108

Step-by-step explanation:

divide 9 by 2, you get 4.5. multiply that by 24 and you get your answer.

6 0

3 years ago

Simplify –2x3y × xy 2.

user100 [1]

$-2x^3y\cdot xy^2=-2x^{3+1}y^{1+2}=-2x^4y^3$

Used:

$a^n\cdot a^m=a^{n+m}$

Answer: C. –2x^4y^3

8 0

3 years ago

How do I do this I really don't understand anything here

Lera25 [3.4K]

The red arrows show that the lines are parallel, but using the stuff given you can make an equation.
its hard to explain without drawing but starting from the 60 if you can make a Z you will get alternate angles and that mean that the given equation MUST be equal to 60. So,

8x-4=60

8x=60+4

8x=64

x=64/8

x=8 (is your answer)

hope you understand

8 0

3 years ago

Let us analyze the following setting. You are given a circle of unit circumference. You pickkpoints on the circle independently

garik1379 [7]

Answer:

We have been given a unit circle which is cut at k different points to produce k different arcs. Now we can see firstly that the sum of lengths of all k arks is equal to the circumference:

$\small \sum_{i = 1}^{k} L_i= 2\pi$

Now consider the largest arc to have length \small l . And we represent all the other arcs to be some constant times this length.

we get :

$\small \sum_{i = 1}^{k} C_i.l = 2\pi$

where C(i) is a constant coefficient obviously between 0 and 1.

$\small \sum_{i = 1}^{k} C_i= 2\pi/l$

All that I want to say by using this step is that after we choose the largest length (or any length for that matter) the other fractions appear according to the above summation constraint. [This step may even be avoided depending on how much precaution you wanna take when deriving a relation.]

So since there is no bias, and \small l may come out to be any value from [0 , 2π] with equal probability, the expected value is then defined as just the average value of all the samples.

We already know the sum so it is easy to compute the average :

$\small L_{Exp} = \frac{2\pi}{k}$

7 0

3 years ago

Architects make scale models of buildings to present their ideas to clients. If an

MaRussiya [10]

The area of the model is 80 square foot

Step-by-step explanation:

Let the area of the house model be 'a'

The scale = 1:50

The area of the house= 4000 square foot

Area of the model =4000/50

a = 80 square foot

The area of the model is 80 square foot

5 0

3 years ago