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3 years ago

Help a sister out- (4x^3 − 3x^2 + 2x − 6) - (7x^2 + 2x + 1)

Mathematics

2 answers:

MariettaO [177]3 years ago

7 0

The answer to your question is..

____ [38]3 years ago

5 0

Answer

$4x^{3}$ − $10^{2}$ −7

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9. The ratio of boys to girls in a class is 4:5. How

lisabon 2012 [21]

A.30
24 divided by 6 is for
5 times 6 is 30

6 0

3 years ago

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First-order linear differential equations

kkurt [141]

Answer:

$(1)\ logy\ =\ -sint\ +\ c$

$(2)\ log(y+\dfrac{1}{2})\ =\ t^2\ +\ c$

Step-by-step explanation:

1. Given differential equation is

$\dfrac{dy}{dt}+ycost = 0$

$=>\ \dfrac{dy}{dt}\ =\ -ycost$

$=>\ \dfrac{dy}{y}\ =\ -cost dt$

On integrating both sides, we will have

$\int{\dfrac{dy}{y}}\ =\ \int{-cost\ dt}$

$=>\ logy\ =\ -sint\ +\ c$

Hence, the solution of given differential equation can be given by

$logy\ =\ -sint\ +\ c.$

2. Given differential equation,

$\dfrac{dy}{dt}\ -\ 2ty\ =\ t$

$=>\ \dfrac{dy}{dt}\ =\ t\ +\ 2ty$

$=>\ \dfrac{dy}{dt}\ =\ 2t(y+\dfrac{1}{2})$

$=>\ \dfrac{dy}{(y+\dfrac{1}{2})}\ =\ 2t dt$

On integrating both sides, we will have

$\int{\dfrac{dy}{(y+\dfrac{1}{2})}}\ =\ \int{2t dt}$

$=>\ log(y+\dfrac{1}{2})\ =\ 2.\dfrac{t^2}{2}\ + c$

$=>\ log(y+\dfrac{1}{2})\ =\ t^2\ +\ c$

Hence, the solution of given differential equation is

$log(y+\dfrac{1}{2})\ =\ t^2\ +\ c$

8 0

4 years ago

QUICK YOU CAN GET 25 POINTS. Members of an art club paint a mural on a large wall that is shaped like a trapezoid. One base of t

Lilit [14]

Answer:

area: 240 ft^2
bases: 20 ft, 10 ft
height: 16 ft

Step-by-step explanation:

Apparently, 4/5 of a gallon is used, so covers ...

(4/5)(300 ft^2) = 240 ft^2

The area of the trapezoid is 240 square feet.

The short base of the trapezoid is half the length of the longer base, so is ...

(1/2)(20 ft) = 10 ft

The lengths of the bases are 20 ft and 10 ft.

The area formula for the trapezoid is ...

A = (1/2)(b1 +b2)h

Filling in the numbers we know, we can find h.

240 = (1/2)(20 +10)h

240 = 15h . . . . . simplify

16 = h . . . . . . . . . divide by 15

The height of the trapezoid is 16 feet.

7 0

3 years ago

Which of the following types of figures may not be a parallelogram?

sergejj [24]

Answer:

2) a trapezoid

Trapezoids have only one pair of parallel sides; parallelograms have two pairs of parallel sides. A trapezoid can never be a parallelogram.

3 0

3 years ago

The sample space below shows the results the final eight matches played by the English soccer team

Mila [183]

Answer: answer is A and B on khan (the subset consists of all the matches where Manchester United’s opponent did not lose) & (the subset consists) of all the matches where Manchester United did not win)

Step-by-step explanation: It’s right on khan academy

4 0

4 years ago

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