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Natasha2012 [34]

3 years ago

7

What is decimal expansion?

1 answer:

laila [671]3 years ago

6 0

Rational numbers and decimal<span> expansions. Posted on September 7, 2008 by Brent. As you may remember from school, rational numbers have a terminating or eventually repeating </span>decimal expansion<span>, whereas irrational numbers don't.</span>

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Klio2033 [76]

Answer:

10x-2y

Step-by-step explanation:

distribute for both of them then multiply both answers by 2 and add them

2(x+y)= (2x+2y) x2= 4x+4y

3(x-y)= (3x-3y) x2= 6x-6y

4x+4y+6x-6x

10x-2y

5 0

3 years ago

If a =5, 0, −1,find a vector b such that compab = 2.b = _______.

Arturiano [62]

Answer:

$b = (q,r , 5q-2\sqrt{26} )$

Step-by-step explanation:

From the question we are told that

The vector given is

$a = (5,0,-1)$

Also $comp_a b = 2$

Generally

$comp_a b = \frac{a \cdot b}{|a|}$

Here $|a|$ is the magnitude of a which is mathematically represented as

$|a| = \sqrt{5^2 + 0^2 +(-1)^2 }$

=> $|a| = \sqrt{26}$

b is vector which we will assume to have the following parameters

$b = (q , r , x)$

So

$comp_a b = \frac{(5,0,-1) \cdot (q,r,x)}{\sqrt{26} } = 2$

=> $\frac{5q + 0 -x}{\sqrt{26} } = 2$

=> $x = 5q-2\sqrt{26}$

Hence the vector be can be mathematically represented as

$b = (q,r , 5q-2\sqrt{26} )$

This means that the vector b is more than one value since it is made up of variable

This means that if

$q = 1\\r=1\\x =1$

Then

$b = (1,1,5-2\sqrt{26} )$

7 0

3 years ago

Jonathan bought a new car in November that cost $23,000. The value of the car decreases by 15% each year. What will the value of

Veronika [31]

Answer:

$5750

Step-by-step explanation:

To find what 15% is in money, we do

23,000*15/100=3450 for one year

3450*5(for five years)=$17,250

Now subtract that

23,000-17,250=$5750

4 0

3 years ago

Write and equation of the translated or rotated graph in general form

german

$(x+3)^2 =4 y$

That's a parabola, almost in vertex form:

$y = \frac 1 4 (x+3)^2$

The translation is

$(x',y') = T_{(-7,2)} (x,y) = (x-7, y+2)$

$x= x'+7, y=y'-2$

Substituting translates the graph. None of the choices have fractions so we substitute into the original form:

$(x'+7+3)^2=4(y'-2)$

We can drop the primes now and simplify,

$(x+10)^2=4(y-2)$

$x^2 + 20 x + 100 = 4y -8$

$x^2 + 20 x - 4y + 108 = 0$

Choice C.

This method generalizes nicely to rotations, reflections and other transformations.

6 0

3 years ago

Use the array to solve the problem 8x9

liberstina [14]

Answer:

72

Step-by-step explanation:

multiply

5 0

3 years ago