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3 years ago

Does ‘x-2’ represent two more then a number? If not how can you make this true?

1 answer:

const2013 [10]3 years ago

8 0

No because it’s a subtraction problem. If we want to make this true we would have to do the inverse application which is addition to make it x+2

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What is the shaded sector? Someone please help me

tamaranim1 [39]

Answer:

90 degrees

Step-by-step explanation:

5 0

4 years ago

How do I figure this problem out 2x+23=92

Pepsi [2]

2x+23=92

Move +23 to the other side.

Sign changes from +23 to -23.

2x+23-23=92-23

2x=92-23

2x=69

divide both sides by 2 to get x by itself

2x/2=69/2

Cross out 2 and 2, divide by 2 and then becomes 1*1*x=x

Answer:

x=69/2 and x=34.5 and x=34 1/2

4 0

3 years ago

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15 in.

meriva

This question really needs to be answered trying to get my points dude

3 0

3 years ago

Solve the differential equation by variation of parameters.<br><br> y''+y=secx

suter [353]

Answer:y=

Acosx+Bsinx +cosx ln(cosx)+x sinx

Step-by-step explanation:

given equation y''+y=secx

auxiliary equation

$p^2+1=0\\p=\pm i$

so CF is y=Acosx+Bsinx

now

$y_1(x)=cosx \ \ \ \ y_2(x)=sinx\\{y_1}'(x)=-sinx \ \ \ \ {y_2}'(x)=cosx$

using wronskian formula

$W=\begin{vmatrix}cosx &sinx \\ -sinx & cosx\end{vmatrix}$

= $cos^2x+sin^2x=1$

now f(x)=secx

$u=-\int \frac{f(x)y_2(x)}{W(x)}dx \ and \ v=\int \frac{f(x)y_1(x)}{W(x)}dx$

$u=-\int \frac{secx\times sinx}{1}dx \ and \ v=\int \frac{secx\times cosx}{1}dx$

$u=-\int tanx dx \ and \ v=\int {1}dx$

$u=ln(cosx) \ \ \ and \ \ v=x$

now particular integrals are

PI=cosx ln(cosx)+x sinx

total solution

y= C.F+P.I

y=Acosx+Bsinx +cosx ln(cosx)+x sinx

8 0

3 years ago

Zack, Jack and Sasha earned £250 altogether delivering leaflets.

AleksAgata [21]

Answer:

Zack earned £125, Jack earned £75, and Sasha earned £50

Step-by-step explanation:

Considering the number of leaflets delivered

Zack 50%, Jack 30% and Sasha 20%

Total delivered = 50 + 30 + 20 = 100%

If they earn £250 on the 100% delivery, then each will have as shown below

Zack = (50/100)*250

= 5*25

= £125

Jack = (30/100)*250

= 3*25

= £75

Sasha = (20/100)*250

=2*25

= £50

5 0

4 years ago

Read 2 more answers