Please help! I will give brainliest to the first correct answer!

Answer:

r his

Step-by-step explanation:rfrfrefeffrefeferfeferfe

Answer: y=-3/1x+13

Step-by-step explanation: I just graphed the two points then found there slope and then I finished the line with the slope and then when I knew what was the y-intercept I finished the problem

Answer:

D

Step-by-step explanation:

Since the side length of the square is (2x+5), and squares have equal sides, then you have to do (2x+5)(2x+5). You would get 4x^2+20x+25. That means the answer is D.

Hope this helped!! :D

9514 1404 393

Answer:

  x = 2

Step-by-step explanation:

The square of the tangent is equal to the product of the secant lengths to the near and far circle intersections.

  (x +4)² = (2x -1)(2x -1 +9)

  0 = (2x -1)(2x +8) -(x +4)² = (4x² +14x -8) -(x² +8x +16)

  0 = 3x² +6x -24 = 3(x² +2x -8) = 3(x +4)(x -2)

This has solutions x = -4 and x = 2. Only the latter works in this geometry.

  x = 2

Answer:

A)  6"

Step-by-step explanation:

set up a proportion then cross-multiply:

1"/4.5' = x/27'

4.5x = 27

x = 27/4.5

x = 6"

Answer:

18

Step-by-step explanation:

So lets go voer what we know:

There are 6 pieces of ribbon.

Each piece of ribbon is 1 yard long.

We need 1/3 of each ribbon(1/3 yard).

To find this, lets take our 6 pieces of ribbbon, and break them into 3 seperate pieces.

This is because we need ribbons that are 1/3 of a yard. 3 ribbons would make up a single yard.

So:

The 6 yards of ribbon x 3 ribbons that make up 1 yard

6*3

=

18

I hope this makes more sense, and helps you understand better. I can try to explain in a different way if this still doesn't make sense.

I hope this helps! :)

Answer:

2.03 liters of 30% antifreeze should be drained and replaced with 100% antifreeze to get the desired strength.

Step-by-step explanation:

Since a car radiator needs a 40% antifreeze solution, and the radiator now holds 14 liters of a 30% solution, to determine how many liters of this should be drained and replaced with 100% antifreeze to get the desired strength the following calculation must be performed:

100 x 0.3 + 0 x 1 = 30

90 x 0.3 + 10 x 1 = 37

85 x 0.3 + 15 x 1 = 40.5

86 x 0.3 + 14 x 1 = 39.8

85.8 x 0.3 + 14.2 x 1 = 39.94

85.7 x 0.3 + 14.3 x 1 = 40.01

85.71 x 0.3 + 14.29 x 1 = 40

100 = 14

14.29 = X

14.29 x 14/100 = X

200.06 / 100 = X

2.03 = X

Therefore, 2.03 liters of 30% antifreeze should be drained and replaced with 100% antifreeze to get the desired strength.

Answer:

5x - 3

Step-by-step explanation:

Add like terms: (4x + x) + (-6 + 3) = 5x - 3

Answer:

3x-3

Step-by-step explanation:

combine like terms, 4x-x=3x and -6+3=-3

Answer:

15 people are able to be at the charity gala because 77:55 divided by 5:17.

Answer:

it looks pretty nice

Step-by-step explanation:

Answer:

The center of this circle is (5, -4) and the radius is 1.

Step-by-step explanation:

First regroup these terms according to x and y :

x^2 - 10x + y^2 + 8y = -40

Next, complete the square for x^2 - 10x:  x^2 - 10x + 5^2 - 5^2.

and the same for y^2 + 8y:  y^2 + 8y + 16 - 16

Substituting these results into x^2 - 10x + y^2 + 8y = -40, we get:

x^2 - 10x + 5^2 - 5^2 y^2 + 8y + 16 - 16 = -40.

Next, rewrite x^2 - 10x + 25 and y^2 + 8y + 16 as squares of binomials:

Then x^2 - 10x + 5^2 - 5^2 y^2 + 8y + 16 - 16 = -40 becomes:

(x - 5)^2 + (y + 4)^2 - 25 - 16 = -40, or:

(x - 5)^2 + (y + 4)^2 = 1

This equation has the form (x - h)^2 + (y - k)^2 = r^2, where (h, k) is the center and r is the radius.  Matching like terms, we get h = 5, k = -4 and r = 1.

The center of this circle is (5, -4) and the radius is 1.

Answer:

Center (5,-4) Radius = 1

Step-by-step explanation:

Put it in the form of the standard circle equation after dividing everything by 2. (-10x/2=-5x) (8y/2=4y) Since the radius wasn't given, it's just going to be a 1.

(x-5)^2+y(-(-4))^2 = 1^2

Hence, center (5, -4) and radius 1.

Answer:

2rootover5

Step-by-step explanation:

just use pythagoraus theorem

Answer:

x ≈ 4.5

Step-by-step explanation:

First, use the Pythagorean theorem to find the missing variable with side 8 and hypotenuse 10.

a² + b² = c²

a² + 8² = 10²

Square the variables

a² + 64 = 100

Subtract 64 from both sides.

a² = 36

Take the square root of both sides.

a = 6.

Now we can find the other triangle and we now know that one side is 4 and the hypotenuse is 6.

a² + b² = c²

x² + 4² = 6²

Square the variables.

x² + 16 = 36

Subtract 16 from both sides.

x² = 20

Square root. (refresh if you don't see this part.)

[tex]x=\sqrt{20}\\\text{Factor out a 2.}\\x=2\sqrt{5}[/tex]

Converted to decimal to the nearest tenth, the answer is

x = 4.5.

Now let's prove it.

[tex]a^2+b^2=c^2\\\text{Substitute variables.}\\(2\sqrt{5})^2+4^2=6^2\\\text{Factor the 2 in.}\\(\sqrt{20})^2+4^2=6^2\\\text{Square the variables.}\\20+16=36\\\text{Add.}\\36=36[/tex]

Answer:

11sqrt(11)

Step-by-step explanation:

Using pythagoras theorem

Answer: [tex]c+3m[/tex]

Step-by-step explanation:

Given

A telephone call costs c cents for first 3 minutes and m cents for each additional minute.

Any call beyond 3 minutes costs

[tex]\Rightarrow c+mt[/tex]

where t is the minutes spent beyond 3 minutes

For 6 minutes , t is 3

thus, it can be written

[tex]\Rightarrow c+3m[/tex]

Answer:

-7

Step-by-step explanation:

If you look at the first number,count how many in between the next number and the one after that.

Answer:

225

Step-by-step explanation:

√x - 3 + 12 = 24

√x + 9 =24

√x = 24 - 9

√x = 15

Squaring on both sides,

( √x )^2 = 15^2

x = 225

Answer:

x=225

Step-by-step explanation:

√x-3+12=24

Combine -3 and 12

√x+9=24

Subtract 9 from 24

√x=15

Now do the opposite of a square root to the other side to remove the square root from the x

x=15^2

x=225

Answer:

V≈2.14×106

Step-by-step explanation:

i looked up volume of a cylinder, do the same.

Answer:

The sum of all angles should be 180°

Step-by-step explanation:

Sum of all angles in a triangle = 180°

115° + 39° = 154°

180° - 154° = 26°

The student found 206°, lets add 206° to 154° and see what we get.

206° + 154° = 360°

Prediction : The student may have forgotten that the sum of all angles in a triangle equals 180° and not 360°

Answer: The sum of all angles should be 180°

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Answer:

8/3

Step-by-step explanation:

We need to find the slope of the line that passes through points , (5,1) and (2,-7) . We can find the slope as ,

=> m = y₁ - y₂/ x ₁ - x ₂

=> m = -7 - 1 / 2 - 5

=> m = -8/-3

=> m = 8/3

Answer:

89°

Step-by-step explanation:

By inscribed angle theorem:

[tex]m\angle ZXY =\frac{1}{2} \times 178\degree \\ \\ m\angle ZXY =89\degree [/tex]

Answer:

B) 2037

Step-by-step explanation:

using the problem an exponential equation can be made

7(1.045)× =25

--solve for x--

x=28.9

it will take 28.9 year for the price to get to $25 so add 2008 to 28.9 to get 2036.9

2037 is closest to 2036.9 so the answer is B

Answer:

20 use Pythagorean theorem

Step-by-step explanation:

Answer:

Step-by-step explanation: 19

Answer:

B

Step-by-step explanation:

2/9th of the money does to netball

2/9 of 1800 is 400

Answer:b

Step-by-step explanation:

Answer:

A ≈ 81.487 in²

Step-by-step explanation:

You know that circumference is C = 2πr, where r is the radius.

So,

C = 2πr

32 = 2(3.14)r

r ≈ 5.093 in

We also know that the formula for the area of a circle is A = πr², so:

A = πr²

A = (3.14)(5.093)²

A ≈ 81.487 in²