What is the answer for #4 ?

Answer:

The center is (-3,2) and the radius is r=2

Step-by-step explanation:

The general equation of the given circle is

[tex]x^2+6x+y^2-4y=-9[/tex]

Add the square of half the coefficient of the linear terms to both sides of the equation to obtain;

[tex]x^2+6x+3^2+y^2-4y+(-2)^2=-9+3^2+(-2)^2[/tex]

[tex]x^2+6x+9+y^2-4y+4=-9+9+4[/tex]

[tex]x^2+6x+9+y^2-4y+4=4[/tex]

The quadratic trinomials in x and y on the left side of the equations are perfect squares.

We factor to obtain;

[tex](x+3)^2+(y-2)^2=4[/tex]

[tex](x--3)^2+(y-2)^2=2^2[/tex]

Comparing to:

[tex](x-h)^2+(y-k)^2=r^2[/tex]

The center is (-3,2) and the radius is r=2

To complete the square and put the equation into graphing form, group x's and y's, add appropriate constants to each group, and rewrite. The circle's equation becomes (x + 3)² + (y - 2)² = 4, with the center at (-3, 2) and a radius of 2.

To complete the square for the equation x² + 6x + y² - 4y = -9 and convert it to graphing form, we need to group the x's and y's together and add the right constants to each group.

Now, the equation is in the graphing form of a circle ((x-h)² + (y-k)² = r²), where (h, k) is the center and r is the radius. Hence, the circle's center is at (-3, 2) and its radius is 2.

Answer:

Lines RQ and SP are perpendicular to SR

Step-by-step explanation:

SR are parallel to PQ so that means that RQ and SP are perpendicular to SR

A. True

B. False

C.true

Answer:

[tex]A(t)=A_{0}e^{\frac{ln(\frac{1}{2})}{22}t}[/tex]

Step-by-step explanation:

This half life exponential decay equation goes by the formula:

[tex]A(t)=A_{0}e^{kt}[/tex]

Where

[tex]k=\frac{ln(\frac{1}{2})}{Half-Life}[/tex]

Since half life is given as 22, we plug that into "Half-Life" in the formula for k and then plug in the formula for k into the exponential decay formula:

So,

[tex]k=\frac{ln(\frac{1}{2})}{Half-Life}\\k=\frac{ln(\frac{1}{2})}{22}[/tex]

Now

[tex]A(t)=A_{0}e^{\frac{ln(\frac{1}{2})}{22}t}[/tex]

third choice is correct.

Substitute the value for y as 450

450=-5x+1

Solve for x

450-1=-5x

449=-5x

89.8=-x

x=-89.8

Answer:

x = 290

Step-by-step explanation:

The x- intercept is the point on the x- axis where the line crosses.

substitute y = 0 into the equation and solve for x

- 5x + 1450 = 0 ( subtract 1450 from both sides )

- 5x = - 1450 ( divide both sides by - 5 )

x = 290 ← x- intercept

line crosses x- axis at (290, 0)

Answer:given that

F (x)=1-x

Step-by-step explanation:

Answer:

The value of |f(i)| is √2.

Step-by-step explanation:

The given function is

[tex]f(x)=1-x[/tex]

We need to find the value of |f(i)|.

Substitute x=i in the given function.

[tex]f(i)=1-i[/tex]

Taking modulus on both the sides.

[tex]|f(i)|=|1-i|[/tex]

Using the formula for modulus of a complex number, we get

[tex]|f(i)|=\sqrt{(1)^2+(-1)^2}[/tex]           [tex][\because |a+ib|=\sqrt{a^2+b^2}][/tex]

[tex]|f(i)|=\sqrt{1+1}[/tex]

[tex]|f(i)|=\sqrt{2}[/tex]

Therefore the value of |f(i)| is √2.

Answer:

A

Step-by-step explanation:

6 3/4 + 9 1/2 = 65/4

26 2/5 - 65/4 = 203/20 or 10 3/20

For this case we have that the parts of a division are:

Dividend, divisor, quotient and remainder.

To make the division of polynomials, we must build a quotient that when multiplied by the divisor (and when the sign is changed), eliminate the terms of the dividend until reaching the remainder of the division.

It must be fulfilled that:

[tex]Dividend = Quotient * Divider + Remainder[/tex]

Then, if we look at the attached figure, the quotient is:

[tex]x ^ 2-2x-3[/tex]

Answer:

[tex]x ^ 2-2x-3[/tex]

Answer:

1 and 4

Step-by-step explanation:

Answer: 249.6 so 250

Step-by-step explanation: Take 416 times it by 0.6 Have a nice day. Hope it helped!

You currently have a 36%.

You need 249-250% to get a 60% in your class.

Best of luck!

Answer:

210

Step-by-step explanation:

Divide 120 by 4 and get 30 and multiply 7 by 30 and you get 210

Final answer:

To dilute 120 cl of orange squash with a ratio of 7:4 (water to squash), you need 210 cl of water. The total mixture will be 330 cl (7+4 parts), of which 120 cl is the squash and the remainder is water.

Explanation:

The student is asking how much water is needed to dilute 120 cl of orange squash if the mixture ratio of water to orange squash is 7:4. To solve this, you need to work with ratios.

First, add the parts of the ratio together: 7 (water) + 4 (orange squash) = 11 parts in total. Now, find out how many parts of the total mixture the 120 cl of orange squash represents. Since the ratio of orange squash is 4 parts, this means that 120 cl is 4 parts of the total mixture.

We can then set up the proportion: 4 parts / 11 parts total = 120 cl / total mixture in cl. Solving for the total mixture gives us: 11 parts * 120 cl / 4 parts = 330 cl.

Finally, to find out how much water is needed, subtract the volume of orange squash from the total mixture volume: 330 cl - 120 cl = 210 cl of water.

[tex]\bf slope = m = \cfrac{rise}{run} \implies \cfrac{ f(x_2) - f(x_1)}{ x_2 - x_1}\impliedby \begin{array}{llll} average~rate\\ of~change \end{array}\\\\[-0.35em] \rule{31em}{0.25pt}\\\\ h(x)= 2x^2\qquad 2\leqslant x \leqslant 4 \qquad \begin{cases} x_1=2\\ x_2=4 \end{cases}\implies \cfrac{h(4)-h(2)}{4-2} \\\\\\ \cfrac{2(4)^2~~-~~2(2)^2}{2}\implies \cfrac{32-8}{2}\implies \cfrac{24}{2}\implies 12[/tex]

Answer:

1 centimeter = 10 millimeters  

Step-by-step explanation:

we have to find about how many millimeters are in a centimeter.

We know that  1 centimeter = 10 millimeters

or 10 millimeters  = 1 centimeter

divide both sides by 10

or \frac{10}{10} millimeters  = \frac{1}{10} centimeter

or 1 millimeters  = 0.1 centimeter

But we need millimeters  in centimeters so we should write :

final answer as 1 centimeter = 10 millimeters.

Answer:c

Diagonals bisect each other

Step-by-step explanation:

This cute the diagonal into two equal parts

Answer: Diagonals of a rhombus bisect each other

Step-by-step explanation:

i got that right

Answer: Option B

Step-by-step explanation:

By definition, the ratio is a comparison between two different things. It can be written in:

Odd notation

[tex]a:b[/tex]

Fractional notation

[tex]\frac{a}{b}[/tex]

Or in words:

[tex]a\ to\ b[/tex]

Given the ratio 3 to 4 and the ratio of 4 to 3, you can rewrite them the fractional form:

[tex]\frac{3}{4}\\\\\frac{4}{3}[/tex]

To know if these ratios are the same number, divide the numerator by the denominator of each one of them:

 [tex]\frac{3}{4}=0.75\\\\\frac{4}{3}=1.33[/tex]

Therefore, the ratio of 3 to 4 and the ratio of 4 to 3 ARE NOT the same number.

The answer is -4/7 or in decimal it’s -0571429

Answer:

x ≈ 78.7° (in degree)

x ≈ 1.4      (in radians)

Step-by-step explanation:

Given in the question an equation

tan(x) = 5

       x =  [tex]tan^{1}(5)[/tex]

       x = 78.69

       x ≈ 78.7°

In radian:

x ≈ 1.4

Answer:

The correct answer is x = 78.7°

Step-by-step explanation:

It is given that,

Tan x = 5

To find the value of x

If tan ∅ = x then ∅ = tan⁻¹ x =

Here  we have tan x = 5

x =  tan⁻¹ 5 = 78.69 ≈ 78.7°

Therefore the value of x = 78.7°

The correct answer is 78.7°

Answer:

Step-by-step explanation:

The sine of any acute angle is equal to the cosine of its complement. The cosine of any acute angle is equal to the sine of its complement. of any acute angle equals its cofunction of the angle's complement. Yes, there is a "relationship" regarding the tangent of the two acute angles (A and B) in a right triangle.

hope this helps u

Answer:

7)60

8)1/6

9)9

10)11.5

11)14.4

Step-by-step explanation:

Answer:divide

Step-by-step explanation:

< less than              ≤ less than or equal to (line underneath sign)

> greater than        ≥ greater than or equal to (line underneath sign)

# is just the number they gave you in the inequality

x < #      [you can put any number into "x", but it has to be less than #]

x > #    [you can put any number into "x", but it has to be greater than #]

x ≤ #       [number has to be less than or equal to #]

x ≥ #      [number has to be greater than or equal to #]

1. t < 7     [t is a number less than 7]

So you circle: 4, 6, 8, 0, -6

3. a ≤ -4     [a is a number less than or equal to -4]

circle: -7, -4

5.

k + 5 < 9    You can simplify this by subtracting 5 on both sides

k < 4    [k is a number less than 4]

circle: -1, 3, -2, 3.5

7. u - 5 ≥ -1  Simplify

u ≥ 4    [u is a number greater than or equal to 4]

circle: 4, 5, 4.1

Answer:

pythagorean theorem

Step-by-step explanation:

a²+b²=c²

Pythagorean theorem

Answer:

5 by 10

Step-by-step explanation:

We know that the equation of a perimeter of a recangle is 2(l)+2(w), l being length and w being width. We know that l=2w. So the perimeter of this room would be:

2(2w)+2(w)=30

4w+2w=30

6w=30

w=5

l=2w

l=10

the dimensions are 5 by ten

The dimensions of the rectangular room with a perimeter of 30 meters and length twice its width are 5 meters wide and 10 meters long.

The subject matter of your question falls into the category of Mathematics, specifically dealing with basic geometry and algebra. You want to find the width and length of a rectangular room given that it is twice as long as it is wide, and that its perimeter is 30 meters.

The perimeter P of a rectangle is calculated by the formula 2L + 2W = P, where L is the length and W is the width. Since the length is given as twice the width, we can substitute 2W for L in the formula and get 2(2W) + 2W = 30, which simplifies to 6W = 30. Solving for W, we find that W = 5. Therefore, the width of the room is 5 meters and the length of the room is 2W = 2*5 = 10 meters.

https://brainly.com/question/32924529

#SPJ2

Answer: c is your answer

Step-by-step explanation:

Answer:

∠B

∠Y

Step-by-step explanation:

we know that

In the right triangle ABC

[tex]tan(B)=\frac{AC}{BC}[/tex] ----> opposite side to angle B divided by the adjacent side to angle B

substitute the values

[tex]tan(B)=\frac{3}{4}[/tex]

Remember that

If two triangles are similar, then the corresponding sides are proportional and the corresponding angles are congruent

so

∠A=∠W

∠B=∠Y

∠C=∠Z

therefore

[tex]tan(B)=tan(Y)[/tex]

Base on the fact that the triangle ABC and WYZ are similar, the angles whose tangent equals 3 / 4 are ∠B and ∠Y

Similar triangle are only different in sizes but are of the same shape.

Similar triangles, corresponding sides are always in the same ratio. Corresponding angles of similar triangles are always congruent. Therefore,

∠A = ∠W

∠B = ∠Y

∠C = ∠Z

Therefore, let's find all angles in the similar triangles whose tangent is equal to 3 / 4 .

tan ∅ = opposite / adjacent

Since,

tan B = 3 / 4

Then

tan Y = 3 / 4

Therefore,

The angles whose tangent equals 3 / 4 are ∠B and ∠Y

learn more on similar triangle here: https://brainly.com/question/11969453

Answer:

i think its C

Step-by-step explanation:

Final answer:

To solve the triangle with sides a=26, b=29, and angle A=58 degrees, apply the Law of Sines to find another angle, use the sum of angles to find the third angle, and then the Law of Cosines to find the remaining side, ensuring all conditions are satisfied for a valid triangle.

Explanation:

To find all solutions for a triangle given a=26, b=29, and A=58 degrees, we use the Law of Sines, which relates the lengths of sides to the sine of their opposite angles. Since sin A > sin a (opposite side to angle A) would result in no solution and considering the given values, we don't encounter this issue. Instead, we have:

sin B / b = sin A / a

Rearranging for B, we have:

B = sin⁻¹(sin A / a × b)

Plugging in our numbers:

B = sin⁻¹((sin 58°) / 26 × 29)

Once B is calculated, we can find angle C since the interior angles of a triangle sum to 180 degrees. Following that, we can use the Law of Cosines to find the third side, c. The process is:

After finding all angles and sides, verify the solution by checking if the interior angles sum to 180 degrees and the sides satisfy the Triangle Inequality Theorem.

Answer:

answer: 1

Step-by-step explanation:

using pemdas you would first go into the parenthesis and multiply 2 by 2 the subtract that from three giving you -1. then, you would multiply that by 1 and add that to 2.

Answer: 8 and 9

Step-by-step explanation:

8 times 9 equals 72

9 minus 8 equals 1.

Answer:

The surface area of the figure is 96 + 64π ⇒ 1st answer

Step-by-step explanation:

* Lats revise how to find the surface area of the cylinder

- The surface area = lateral area + 2 × area of one base

- The lateral area = perimeter of the base × its height

* Lets solve the problem

- The figure is have cylinder

- Its diameter = 8 cm

∴ Its radius = 8 ÷ 2 = 4 cm

- Its height = 12 cm

∵ The perimeter of the semi-circle = πr

∴ The perimeter of the base = 4π cm

∵ The area of semi-circle = 1/2 πr²

∴ The area of the base = 1/2 × π × 4² = 8π cm²

* Now lets find the surface area of the half-cylinder

- SA = lateral area + 2 × area of one base + the rectangular face

∵ LA = perimeter of base × its height

∴ LA = 4π × 12 = 48π cm²

∵ The dimensions of the rectangular face are the diameter and the

   height of the cylinder

∴ The area of the rectangular face = 8 × 12 = 96 cm²

∵ The area of the two bases = 2 × 8π = 16π cm²

∴ SA = 48π + 16π + 96 = 64π + 96 cm²

* The surface area of the figure is 96 + 64π

Answer:

A

Step-by-step explanation:

edge 2021

Answer:

x=y/4 + 4

Step-by-step explanation:

y=4x-16

-need to isolate x

add 16 to both sides.

y+16=4x

divide by 4 on both sides.

y/4 + 4 = x

For this case we have the following equation:

[tex]x + 1 = \frac {2} {x + 1}[/tex]

We must find the value of [tex]x + 1[/tex]:

Multiplying both sides of the equation by[tex]x + 1:[/tex]

[tex](x + 1) ^ 2 = 2[/tex]

Applying square root on both sides of the equation to eliminate the exponent:

[tex]x + 1 = \sqrt {2}[/tex]

Answer:

Option B

Answer: B

Step-by-step explanation: