youssef13 youssef13

23-12-2017
Mathematics

contestada

if (x+y)^2 =49 and (x-y)^2 = 9 what is the value of x

Respuesta :

ElenaClaudia ElenaClaudia

23-12-2017

Hello from Romania!

[tex](x+y)^2 = 49 \\ x+y= \sqrt{49} \\ x+y=7 \\ \\ (x-y)^2=9 \\ x-y= \sqrt{9} \\ x-y=3 \ \ \ \ \Rightarrow y=x-3 \\ \\ x+y=7 \\ x+x-3=7 \\ 2x-3=7 \\ 2x=10 \\ \boxed{x=5}[/tex]

Good luck!

Answer Link

Otras preguntas

Solve for x: 2(x + 3)2 − 4 = 0

In a few sentences, explain what it means to be financially responsible.

There are 18 oranges in box A and 36 in box B what is the ratio of the oranges in box A to box B

What is the central idea of "Stopping by Woods on a Snowy Evening"? a: without alerting the neighbor, a man stops in his neighbor’s woods outside the village b:

Makayla is taking a math course and is working with the perimeter of rectangles. She knows the perimeter and length of her rectangle but wants to solve for the

I need two paragraphs advantages and disadvantages about smart phones

Two trains approach each other on parallel tracks. Each has a speed of 95 kph relative to the ground. If they are initially 8.5 km apart, how long will it be be

Solve: -1/9 + (-5/9)

Convert the following four unsigned binary numbers to decimal and show your work: 10111 10101 01010 111111 001111

N^2-4n Help please thanksss