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igor_vitrenko [27]
3 years ago
11

Please help Find a: x+a=3 x-a=1

Mathematics
1 answer:
marishachu [46]3 years ago
3 0

Answer:

ITS 2

Step-by-step explanation:

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What is the value of the correlation coefficient r of the data set
bonufazy [111]

Answer:

the answer is 0.84

Step-by-step explanation:

5 0
3 years ago
Solve for y: 7+ 2(x + y) = 11
Crank

Isolate the variable by dividing each side by factors that don't contain the variable.

y = 2 − x

3 0
3 years ago
The difference between the solutions to the equation x2 =a is 30 what is a ?
Mademuasel [1]
Given equation is x^2 = a

In general solution of x^2 = b is x = + \sqrt{b} and x = -  \sqrt{b}

So the solution of given equation is x = + \sqrt{a} and x = -  \sqrt{a}

Now difference between them is 30.
So we can write
\sqrt{a} - (- \sqrt{a}) = 30
\sqrt{a} +  \sqrt{a} = 30
2 \sqrt{a} = 30
\sqrt{a} = 15

On squaring both side
( \sqrt{a})^2 = (15)^2
a = 225
4 0
4 years ago
How does anyone know the answer to this?
katrin2010 [14]
Take the common out of both numerator and denominator and cancel out the terms which are equal.

(8x³ - 2x² - 3x)/(12x²- 9x)

= x(8x² - 2x -3)/3x(4x - 3)

= (8x² - 2x -3)/3(4x - 3)

=(4x-3)(2x+1)/3(4x-3)

= (2x+1)/3
6 0
3 years ago
The price of a certain property increased by 10% in the first year, decreased by 20% in the second year, and increased by 25% in
Marizza181 [45]

Answer:

1) $4400

2) $4400

Step-by-step explanation:

Let

X = price in first year

Y = price in 2nd year

Z = price in 3rd year

A = price in the end of 3rd year

Y = 1.1 X

Z = 0.8 Y

substitute Y into Z get Z = 0.88 X

A = 1.25 Z= 1.25(0.88X) = 1.1 X

1)

(125/100) Z = 22000

Z = 22000 x 100 / 125 = 17600

Z = 0.8Y

Y = Z/0.8 = 1.25Z

Amount of dollar decrease in 2nd year = Y - Z

= 1.25Z - Z = 0.25Z = 0.25 x 17600 = 4400 dollar

2)

Decrease in price over first 2 years = Increase in property in 3rd year - 2000

Hence, X - Z = (A-Z) - 2000

X - 0.8X = 1.1 X - 0.88 X - 2000

X - 0.88X - 1.1X + 088X = -2000

-0.1 X = -2000

0.1 X = 2000

X = 20000

Amount of dollar decrease during 2nd year = Y - Z = 1.1X - 0.88X = 0.22X

= (0.22) x (20000) = 4400 dollars

3 0
3 years ago
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