All categories

3 years ago

WILL MARK BRAINLIEST!!! HELP!

Mathematics

1 answer:

deff fn [24]3 years ago

4 0

Answer:

y = 2 sqrt(2) - 2 or y = -2 - 2 sqrt(2) thus B. is the correct answer

Step-by-step explanation:

Solve for y:

-y^2 - 4 y + 4 = 0

Multiply both sides by -1:

y^2 + 4 y - 4 = 0

Add 4 to both sides:

y^2 + 4 y = 4

Add 4 to both sides:

y^2 + 4 y + 4 = 8

Write the left hand side as a square:

(y + 2)^2 = 8

Take the square root of both sides:

y + 2 = 2 sqrt(2) or y + 2 = -2 sqrt(2)

Subtract 2 from both sides:

y = 2 sqrt(2) - 2 or y + 2 = -2 sqrt(2)

Subtract 2 from both sides:

Answer: y = 2 sqrt(2) - 2 or y = -2 - 2 sqrt(2)

You might be interested in

Someone can you please help me on number 74

lisabon 2012 [21]

Answer:

9t^3 +t^2

Step-by-step explanation:

The perimeter of the figure is the sum of the lengths of the sides. The side lengths are represented by the polynomials shown, so the perimeter (P) is their sum:

P = (4t^3 -5) + (4t^3 -5) + (t^2 +9) + (t^3 -t^2 -11) + (t^2 +12)

Rearranging to group like terms:

P = (4t^3 +4t^3 +t^3) + (t^2 -t^2 +t^2) + (-5 -5 +9 -11 +12)

P = 9t^3 +t^2

The perimeter of the figure is represented by the polynomial 9t^3 +t^2.

5 0

3 years ago

Read 2 more answers

HELP MEEEEEEEEEE WILL MARK BRAINLESTI HAVE OVERDUE ASSIGNMENTS

ki77a [65]

Answer:

Step-by-step explanation:

2x - 7 = 27

2x = 34

x = 17

8 0

3 years ago

A researcher is exploring the notion that there is an economy of scale in raising children. While having one child might add to

trasher [3.6K]

Answer:

The probability is $G = 85%$

Step-by-step explanation:

From the question we are told that

The percentage of parents that have one child under 18 in their homes is k = 15%

The percentage of parents that have two children is T = 65%

The percentage of parents that have three or more children is Y = 20%

Generally the probability that any given family who is selected have two or more children at home is mathematically evaluated as

$G = T + Y$

=> $G = 65% + 20%$

=> $G = 85%$

4 0

3 years ago

Explain how you got the answer

Gnoma [55]

Answer:

$\huge\boxed{Center = (3,3),Radius = 2\sqrt{15} }$

Step-by-step explanation:

<u><em>Given equation is</em></u>

$x^2 + y^2 -6x-6y -42 = 0$

Adding 42 to both sides

$x^2 + y^2 -6x-6y = 42\\$

Completing squares

$x^2 -6x+y^2 -6x = 42\\(x)^2 - 2(x)(3) +y^2 - 2(y)(3) = 42$

Adding (3)² => 9 and (3)² => 9 to both sides

$(x-3)^2+(y-3)^2 = 42+9+9\\(x-3)^2 + (y-3)^2 = 60\\(x-3)^2 (y-3)^2 = (2{\sqrt{15})^2}$

Comparing it with $(x-h)^2+(y-k)^2 = r^2$ where Center = (h,k) and Radius = r

We get:

Center = (3,3)

Radius = $2\sqrt{15}$

7 0

3 years ago

Can you please help me and show you work

Nutka1998 [239]

Answer:

37.50 and 84.97

Step-by-step explanation:

5 0

3 years ago

WILL MARK BRAINLIEST!!! HELP!​

WILL MARK BRAINLIEST!!! HELP!