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2 years ago

15

(2+5i)(6-i) simply ........

2 answers:

satela [25.4K]2 years ago

5 0

Answer:

=17+28i

Step-by-step explanation:

Verizon [17]2 years ago

3 0

Answer:

17+28i

Step-by-step explanation:

TELL ME IF IM RIGHT PLEASR

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Solve for z.<br> az + 17 = -4z – b.

Harrizon [31]

Answer:

z = -b - 17 / ( a + 4 )

Step-by-step explanation:

az + 17 = -4z – b

collect like terms

az + 4z = -b -17

z( a + 4 ) = - b - 17

Divide both sides by ( a + 4 )

z = -b - 17 / ( a + 4 )

5 0

3 years ago

Tyler made 9 1/2 cups of lemonade. He offers 3/4-cup servings of lemonade to some relatives at a family pinic. What is the GREAT

Savatey [412]

Divide the total portion (9 1/2 cups) by the portion size (3/4 cup).

=9 1/2 ÷ 3/4
convert 9 1/2 to improper fraction

=19/2 ÷ 3/4
to divide fractions, multiply by the reciprocal/inverse of 3/4

=19/2 * 4/3
multiply numerators; multiply denominators

=(19*4)/(2*3)

=76/6

=12.666666

ANSWER: The greatest number he can offer servings to is C) 12

Hope this helps! :)

8 0

2 years ago

Read 2 more answers

Consider the following differential equation to be solved by undetermined coefficients. y(4) − 2y''' + y'' = ex + 1 Write the gi

kompoz [17]

Answer:

The general solution is

$y= (C_{1}+C_{1}x) e^0x+(C_{3}+C_{4}x) e^x +\frac{1}{2} (e^x(x^2-2x+2)-e^x(2(x-1)+e^x(2))$

+ $\frac{x^2}{2}$

Step-by-step explanation:

Step :1:-

Given differential equation y(4) − 2y''' + y'' = e^x + 1

The differential operator form of the given differential equation

$(D^4 -2D^3+D^2)y = e^x+1$

comparing f(D)y = e^ x+1

The auxiliary equation (A.E) f(m) = 0

$m^4 -2m^3+m^2 = 0$

$m^2(m^2 -2m+1) = 0$

$(m^2 -2m+1) this is the expansion of (a-b)^2$

$m^2 =0 and (m-1)^2 =0$

The roots are m=0,0 and m =1,1

complementary function is $y_{c} = (C_{1}+C_{1}x) e^0x+(C_{3}+C_{4}x) e^x$

<u>Step 2</u>:-

The particular equation is $\frac{1}{f(D)} Q$

P.I = $\frac{1}{D^2(D-1)^2} e^x+1$

P.I = $\frac{1}{D^2(D-1)^2} e^x+\frac{1}{D^2(D-1)^2}e^{0x}$

P.I = $I_{1} +I_{2}$

$\frac{1}{D^2} (\frac{x^2}{2!} )e^x + \frac{1}{D^{2} } e^{0x}$

$\frac{1}{D} means integration$

$\frac{1}{D^2} (\frac{x^2}{2!} )e^x = \frac{1}{2D} \int\limits {x^2e^x} \, dx$

applying in integration u v formula

$\int\limits {uv} \, dx = u\int\limits {v} \, dx - \int\limits ({u^{l}\int\limits{v} \, dx } )\, dx$

$I_{1}$ = $\frac{1}{D^2(D-1)^2} e^x$

$\frac{1}{2D} (e^x(x^2)-e^x(2x)+e^x(2))$

$\frac{1}{2} (e^x(x^2-2x+2)-e^x(2(x-1)+e^x(2))$

$I_{2}$ $= \frac{1}{D^2(D-1)^2}e^{0x}$

$\frac{1}{D} \int\limits {1} \, dx= \frac{1}{D} x$

again integration $\frac{1}{D} x = \frac{x^2}{2!}$

The general solution is $y = y_{C} +y_{P}$

$y= (C_{1}+C_{1}x) e^0x+(C_{3}+C_{4}x) e^x +\frac{1}{2} (e^x(x^2-2x+2)-e^x(2(x-1)+e^x(2))$

+ $\frac{x^2}{2!}$

3 0

3 years ago

After knee surgery, your trainer tells you to return to your jogging program slowly. He suggests

sveticcg [70]

If you find a wrong thing on answer respond me

8 0

3 years ago

Read 2 more answers

Devaughn's age is three times Sydney's age. The sum of their ages is 80. What is Sydney's age?

Gekata [30.6K]

U times any number by 3 and see witch ones the closest
27x3=81 that's what I think and that's the closest

6 0

2 years ago

Read 2 more answers