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2 years ago

X² + 2x² = y - 2y= 4x + 5x

Mathematics

2 answers:

Rudik [331]2 years ago

7 0

Here are your answers

x^2 + 2x^2 = 3x^2

y - 2y = -y

4x + 5x = 9x

Hope it helps
Have a great day :)

Dafna1 [17]2 years ago

6 0

Answer:

$3 {x}^{2}$

$- y$

$9x$

Step-by-step explanation:

combine like terms

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3 years ago

Evaluate the double integral.

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Answer:

$\iint_D 8y^2 \ dA = \dfrac{88}{3}$

Step-by-step explanation:

The equation of the line through the point $(x_o,y_o)$ & $(x_1,y_1)$ can be represented by:

$y-y_o = m(x - x_o)$

Making m the subject;

$m = \dfrac{y_1 - y_0}{x_1-x_0}$

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we need to carry out the equation of the line through (0,1) and (1,2)

i.e

y - 1 = m(x - 0)

y - 1 = mx

where;

$m= \dfrac{2-1}{1-0}$

m = 1

Thus;

y - 1 = (1)x

y - 1 = x ---- (1)

The equation of the line through (1,2) & (4,1) is:

y -2 = m (x - 1)

where;

$m = \dfrac{1-2}{4-1}$

$m = \dfrac{-1}{3}$

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$\iint_D 8y^2 \ dA =8 \bigg [ \dfrac{-45+56}{3}\bigg]$

$\iint_D 8y^2 \ dA =8 \bigg [ \dfrac{11}{3}\bigg]$

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