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3 years ago

What is the product of the expression?(a-3b) (2a+2b)

Mathematics

1 answer:

Dmitry_Shevchenko [17]3 years ago

8 0

I think is

2a2 + 2ab - 6ab + 6b2

2a2 + 6b2 - 4ab

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What is the slope of a line that is perpendicular to the line y = 8x + 5? −8 8

Snowcat [4.5K]

Answer:

y = 7x + 4? - 7 7

Step-by-step explanation:

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3 years ago

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Help me solve this and get marked branliest:

bazaltina [42]

Answer:

75°

Step-by-step explanation:

Let's find the size of x°

BCFE has four sides so the sum of its angles sizes is 360°.

● CBE + 110 + 110 + CFE = 360

CFE is equal to 65° since they have the same vertex

● CBE + 220 + 65 = 360

● CBE + 285 = 360

● CBE = 360-285

● CBE = 75

CBE and x° have the same size since they share the same vertex.so:

● x° = 75°

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3 years ago

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steposvetlana [31]

Answer:

the second one

Step-by-step explanation:

y = 2/3 (x +6)-5

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3 years ago

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Can someone help me?

3241004551 [841]

-8/12

add together but keep the negative

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3 years ago

∫c<br> x sin y ds, C is the line segment from (0, 1) to (3, 5)

Mnenie [13.5K]

Parameterize the line segment $C$ by

$\mathbf r(t)=\langle x(t),y(t)\rangle=(1-t)\langle0,1\rangle+t\langle3,5\rangle=\langle3t,1+4t\rangle$

where $t\in[0,1]$ . Then

$\mathrm ds=\|\mathbf r'(t)\|\,\mathrm dt$
$\mathrm ds=\|\langle3,4\rangle\|\,\mathrm dt$
$\mathrm ds=5\,\mathrm dt$

So the integral is

$\displaystyle\int_Cx\sin y\,\mathrm ds=5\int_0^1x(t)\sin y(t)\,\mathrm dt$
$=\displaystyle5\int_0^13t\sin(1+4t)\,\mathrm dt$
$=\dfrac{15}{16}(\sin5-\sin-4\cos5)\approx-2.7516$

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3 years ago