Me and my mom are confused. Please help!!​

Answer:

[tex]\tt{} x_{1} = 4 \\ \tt{} x_{2} = 5 \\ [/tex]

Step-by-step explanation:

[tex]\tt{} \sqrt{ {x}^{2} - 16 } - 3 \sqrt{x - 4} = 0[/tex]

[tex]\tt{} \sqrt{ {x}^{2} - 16 } = 3 \sqrt{x - 4} [/tex]

[tex]\tt{}{x}^{2} - 16 = 9(x - 4)[/tex]

[tex]\tt{}(x - 4).(x + 4) = 9(x - 4)[/tex]

[tex]\tt{}(x - 4) \times (x + 4 - 9) = 0[/tex]

[tex]\tt{}( x - 4) \times (x - 5) = 0[/tex]

[tex]\tt{}x - 4 = 0 \\ \tt{}x - 5 = 0[/tex]

[tex]\tt{}x = 4 \\ \tt{}x = 5 \\ \\ [/tex]

[tex]\tt{} x_{1} = 4 \\ \tt{} x_{2} = 5 [/tex]

Answer:

x = 4, 5.

Step-by-step explanation:

√(x^2 - 16) - 3√(x - 4) = 0

√(x^2 - 16) = 3√(x - 4)

Square both sides of the equation:

x^2 - 16 = 9(x - 4)

x^2 - 9x - 16 + 36 = 0

x^2 - 9x + 20 = 0

(x - 4)(x - 5) = 0

x = 4, 5.

As the original equation contained square roots:

We test for extraneous solutions:

x = 4:

√(4^2 - 16) - 3√(4 - 4) = 0 - 3*0 = 0  so x = 4 is OK.

x = 5:

√(5^2 - 16) - 3√(5 - 4) = √9 - 3√1 = 0  so x = 5 is also OK.

Answer:

here is an an example

Step-by-step explanation:

Let x = the width of the rectangle

P = 2l + 2w

2(40) + 2x ≤ 150

80 + 2x ≤ 150

2x ≤ 70

x ≤ 35 cm

Answer:5

Step-by-step explanation: 4*5=20

- BRAINLIEST answerer

Answer:

Lauren

Step-by-step explanation:

1/2 is Erin

3/4 is Lauren

Answer:

1/2 for Eric and 6/8 for lauren

Eric: 1/2 = 4/8

Lauren: 6/8

Lauren was more succesful

Step-by-step explanation:

Answer: $48.93

Step-by-step explanation: 789.18 x 0.062

Answer:

$48.93

Step-by-step explanation:

789.18 x (0.062)  = 48.92916      $48.93

took the test

Answer:

x=0, y=2

Step-by-step explanation:

x-2y=-4

-x+8y=16

   -10y=-20

    y=2

x-2y=-4

x-2(2)=-4

x-4=-4

x=-4+4

x=0

Answer:

say you buy something for 10 dollars, you are going to get charged for it, but if you take item off of your shopping cart you are taking away the -10 dollars that wouldve been charged.

Step-by-step explanation:

the reason this works is because you take away something that makes it less.

- (-7) is basically just saying delete that -7. that's why - (-7) is the same as +7

Answer:

-2,-4

0,-4

-1,-2

-1,2

2,2

Step-by-step explanation:

on the left is the x which is domain and on the right is the y which is range so connect the lines and get ur answer

Answer:

Your picture is blurred

Step-by-step explanation:

Picture is blurred

Answer:

Ronaldo

Step-by-step explanation:

Answer:

If you pay $38.50 for 12 pounds of apples it costs $3.20833333333 per pound.

Step-by-step explanation:

Refer to the attachment

Answer:

Print between 25 - 2,000 books. Your price per book will go down as your quantity increases.

Step-by-step explanation:

Answer:

move all terms to the left side and set equal to zero. Then set each factor equal to zero.

[tex]y= n + m/ b-a[/tex]

Step-by-step explanation:

Answer:

40 because 10 x 4 = 40

Step-by-step explanation:

Dude this is baby level question

Answer is 10×4= 40

So 40 Eggs

Answer:

She set up the conversion ratios incorrectly.

Step-by-step explanation:

30 cms

= 30 / 2.54 inches

= 30 / 2.54  / 12feet

= 0.984 feet.

Answer:

dffffgggggghhhhhhhh give me my points

Step-by-step explanation:

Answer:

25:50

or

25/50

or

25 to 50

Step-by-step explanation:

Simply take the number of red marbles and place it before the number of total marbles

Answer:

y=3

x=2

Step-by-step explanation:

3 x 18 =54

2 x 12 = 24

54+24=78

Answer:

x = 2; y = 3

Step-by-step explanation:

x + y = 5

12x + 18y = 78

Do system of equation

->  x = 2; y = 3

Answer:

o

Step-by-step explanation:

o

thx for the points :D

Answer:

A) 5/10

B) 3/4

C) 1/4

D) 4/4

Step-by-step explanation:

Hope this helps

Answer:

The simplest form of ratio 6:15=2×3:5×3=2:5

So, 2:5 is equivalent to 6:15

Step-by-step explanation:

Hope this helps :)

Answer:

10/4

Step-by-step explanation:

Answer:

8 tickets

Step-by-step explanation:

x = 10 in the given equation.

We have then:

C (x) = 17.5x - 10

C (10) = 17.5 * (10) - 10

C (10) = 165

Answer:

to buy 10 tickets cost:

$ 165

b. How many tickets can you buy with $ 130?  

For this case we must make the substitution: C (x) = 130

We have then:

C (x) = 17.5x - 10

130 = 17.5x - 10

Clearing x we have:

17.5x = 130 + 10

17.5x = 140

x = (140) / (17.5)

x = 8

Answer:

You can buy 8 tickets with $ 130

Answer:

f(-5) = 4(-5) + 1 = -20 + 1 = -19

f(-1) = 4(-1) + 1 = -4 + 1 = -3

f(2) = 4(2) + 1 = 8 + 1 = 9

f(3) = 4(3) + 1 = 12 + 1 = 13

f(5) = 4(5) + 1 = 20 + 1 = 21

Step-by-step explanation:

[tex] \sf \pink{ ii) a boy is selected}[/tex]

Answer:

Um Sorry I Didn't Understand

2x+y=7

-2x       -2x

y=-2x+7

slope of -2

Hope this is right, feel free to correct me in the comments

Answer:

-2

nsskwiwkwnwhsisnenwnwjw w w

Answer:

7) 3x=45( corresponding angles formed on parallel lines)

x=45/3

x=15

8)120=2x+10(corresponding angles formed on parallel lines)

or,120-10=2x

or,110/2=x

or,x=55

Step-by-step explanation:

here is your answer

hope it will be helpful for you

thanks ☺

Answer:

I have come to claim these points as my own...again, thank you friend.

Step-by-step explanation:

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