MATHEMATICS MIDDLE SCHOOL

Which of the following equations best describes a square root function that is reflected across the x-axis and has a vertex of (−4,2)?A. y=√(-(x-4)) +2

B. y= -√(x+2)-4

C. y=-√(x+4) +2

D. y=-√(x-4) +2

Answers

Answer 1
Answer:

Answer:

C

Step-by-step explanation:

Rather than picking, let's try to construct one from the description.

reflected over the x axis means -√(x)

the vertex is usually at (0,0), now how do we move a graph?  or in other words  translating it.

To move left and right you use √(x-h) where if you subtract h you move right and if you add h you move left.  we go from (0,0) to (-4,2).  so 0 to -4 is 4 left, so that means we add 4.

To move up and down we use √(x)+v Here if v is positive you move up and if v is negative you move down.  going from (0,0) to (-4,2) it moves up 2

So now we put them all together -√(x+4)+2  And if you look, C matches that exactly.

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What is the decimal expansion of the fraction 7/9
How many ninths in 2 2/3

Match the expressions with their simplified versions.

Answers

Answer:

Step-by-step explanation:

1. 4√(2)*√(2) = 4*√(2)^(2)=4*2=8

2.3√(7) -2√(7) =(3-2) √(7) = 1*√(7) =√(7)

3.(√(7) )/(2√(7) ) =(1)/(2)

4.2√(5) *2√(5) =2*2*√(5) *√(5)=4*5=20

Answer are in order from top to bottom

1. 8

2. square of 7

3. 1/2

4. 20

Half is a third of it.what is it?

Answers

Let's call 'it' x. 1/2 is equal to one third of x, so we could say that 1/3x = 1/2

Now we just have a simple equation to solve:

1/3x = 1/2
x = (1/2) / (1/3)

Dividing by a rational number (such as 1/3, which is expressed in fraction form) is the same as multiplying by its reciprocal (the reciprocal of a fraction is itself when the numerator and denominator have been swapped). Therefore

x = (1/2) / (1/3) = (1/2) * 3 = 3/2 = 1.5

To check this answer, test the statement. Half is a third of x, where x=1.5:

1.5 / 3 = 0.5 = 1/2

The expression 12a+7s is the cost, in dollars, for a adults s students to enter the local marching band competition. Find the total cost for 4 adults and 30 students.Before you delete this I did try on my own and this has been confusing me

Answers

If 12A is equal to one adult, then this means that one adult will cost $12 to enter.
The same applies for the students, if 7s is equal to one student, then the cost of one student is $7.
As you've got four adults, then you need to find the cost of 4, and you do this by multiply 4 by 12.
4x12=$48
As you've got 30 students, you then need to multiply 30 by 7.
30x7=$210.
To find the total cost, you've then got to add $48 and $210 together.
$48+$210= $258.

Therefore, the total cost for 4 adults and 30 students is $258
Hope this helps :)
a=$4, s=$30

=12($4)+7($30)
=$48+$210
=$258

Which graph shows the solution to the system of linear inequalities? y < 2x – 5 y > –3x + 1

Answers

Answer:

Your answer is graph B

Step-by-step explanation:

(I can't provide the graph)

--This is right on edg2020! I hope this helps!--

Answer:

Where are the graphs

Step-by-step explanation:

Oranges are sold 5 for $12 how much will be for $84

Answers

multiply up the 3 numbers and you can get your answer

What is the solution to the following system?4x - 1 = -½x + 8

a.
(7,2)

b.
(6,-8)

c.
(2,7)

d.
(4,-4)

Answers

Answer:

l think the problem of the is your work is not of the number l got.

x=2
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