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2 years ago

What is the value of the expression 4x+y2y−x when x = 2 and y = 4?

Mathematics

2 answers:

My name is Ann [436]2 years ago

6 0

The answer should be the first one, 2. Do you need and explanation?
4x+y/2y-x

Start by replacing all of the variables.
4(2)+4/2(4)-2

Now work multiply.
8+4/8-2

Now add.
12/6

That is your fraction. But you must simplify it.

Its simplifies to 2.

galben [10]2 years ago

4 0

(4(2)+4)/(2(4)-2)
=(8+4)/(8-2)
12/6
=2

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I need help. this is the problem x^2/3+10=7x^1/3

Arlecino [84]

$\it x^{\frac{2}{3}}+10=7x^{\frac{1}{3}} \Leftrightarrow (x^{\frac{1}{3}})^2-7x^{\frac{1}
 {3}} +10=0 
\\\;\\
We\ note\ x^{\frac{1}{3}} =t \ \ and \ the \ equation \ will \ be:
\\\;\\
t^2-7t+10 = 0 \Leftrightarrow t^2 -2t-5t+10=0 \Leftrightarrow t(t-2) -5(t-2)=0$

$\it \Leftrightarrow (t-2)(t-5)=0 
\\\;\\
t-2=0 \Rightarrow t=2 \Rightarrow x^{\frac{1}{3}}=2 \Rightarrow (x^{\frac{1}{3}})^3 =2^3 \Rightarrow x = 8
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7 0

3 years ago

Keller lives in a city with 54,706 people. Dawson lives in a city with 45,802 people. How can the two cities that Keller and Daw

Genrish500 [490]

Answer:

54,706 > 45,802

Step-by-step explanation:

Well, as you know, the > symbol means that one number has a greater value than another. For example, 2 > 1. The way we can find that out is using subtraction. Take 54,706 - 45,802, and if that number is positive, then the first number is greater than the other.

54,706 - 45,802 = 8,904

8,904 is a positive.

Therefore, 54,706 > 45,802.

6 0

3 years ago

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Select the graph that best represents the solution set of the system of linear inequalities

Butoxors [25]

I think C
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2 years ago

What is the value of x in this triangle?

Dvinal [7]

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3 years ago

A rectangular field is 5x meters long and 2x m wide. if its perimeter is 140cm what is its area?

Yakvenalex [24]

Answer:

1000 cm²

Step-by-step explanation:

perimeter = 2 * length + 2 * width

2 * 5x + 2 * 2x = 140

10x + 4x = 140

14x = 140

x = 10

Length: 5x = 5(10) = 50

Width: 2x = 2(10) = 20

area = length * width

area = 50 cm * 20 cm

area = 1000 cm²

3 0

2 years ago