Question 1 (1 point)
This diagram is a straightedge and compass construction. A is the center
of one circle,
and B is the center of the other. Explain how we know triangle ABC is
equilateral.

===========================================================

Explanation:

Parallel lines never cross, so we can rule out choices B, C, and D. These choices all have segments that cross or meet somehow. Segments AB and OC don't intersect, and their extended lines do not appear to intersect either.

---------

We don't really need to use a diagram for this problem even though a diagram is handy. The reason we don't need a diagram is simply look at the letters to see if there's any repeated letters.

For instance, with choice B, the letter O shows up twice. So that must mean the two segments intersect at point O. But we can't have parallel lines intersect, which allows us to rule out choice B. The other answer choices we rule out will follow the same idea.

Only AB and OC have letters that don't show up twice.

Answer:

A) AB and OC

Step-by-step explanation:

Ok, so basically, when two lines are parallel, t means they will never touch each other no matter how long they are

for example, these two l‘s are parallel

l l

in this problem, we just have to find the lines that are parallel

finsing the lines are quite easy, just look for the first letter, in this case, A, then find the other lettter, here it is B, and there is your line!

here all the lines are marked in red, whch makes finsing each line easier

proving our answer is correct...

BO and CO makes an upside down V shape ( like a roof )

CO and CD make a v Shape

and

CD and DO make an upside down L

i hope this helped!

Answer:

18

Step-by-step explanation:

-3a² - b³ + 3c² - 2b³

= -3(2)² - (-1)³ + 3(3)² - 2(-1)³

= -3(4) - (-1) + 3(9) - 2(-1)

= (-12 + 1 )+ (27 + 2)

= -11 + 29

= 18

Answer:

18

Step-by-step explanation:

a = 2, b = -1, c = 3

-3a^2 - b^3 + 3c^2 - 2b^3

-3(2^2) - (-1^3) + 3(3^2) - 2(-1^3)

-3(4) - (-1) + 3(9) - 2(-1)

-12 + 1 + 27 + 2

-12 + 30

18 <===

For f function, we don't need to us the value of g function. So, 1-3x = 1-3.-1/3 =2

Answer : 2

f(-⅓) = 2

Step-by-step-explanation :

[tex]f(x) = 1 - 3x \\ f( \frac{ - 1}{3} ) = 1 - 3( \frac{ - 1}{3} ) \\ f( \frac{ - 1}{3} ) = 1 + \frac{3}{3} = 1 + 1 = 2[/tex]

Answer:

The answer is $330.73.

Step-by-step explanation:

The answer is $330.73.

Step 1. Calculate simple interest: I = ?

Step 2. To get account balance add simple interest to the principal amount:

I + P = ?

Step 1. Calculate simple interest.

I = P * r * t

P - principal

r - rate

t - time period

We have:

P = $278.16

r = 2.1% = 2.1/100 = 0.021

t = 9

I = 278.16 * 0.021 * 9 = 52.57

Step 2. To get account balance add simple interest to the principal amount:

I + P = ?

52.57 + 278.16 = 330.73

Answer:

1.53 £

Step-by-step explanation:

9×17 = 153p

we know this because there are 5 days left in November and 12 days in December (hence the 17).

Answer:

The correct answer would be No fine is paid if the DVD is returned by the due date, because the first 0 means it is 0 days overdue, so it is returned on time, and the second 0 means the fine would be $0

Step-by-step explanation:

Answer:

-10

Step-by-step explanation:

g(x) = -3x^2 +4x+5

Let x = 3

g(3) = -3*(3)^2 +4*3+5

     = -3*9 +12+5

     = -27+12+5

     = -10    

Answer:

g(3) = -10

Step-by-step explanation:

g(x) = -3x^2 + 4x + 5

g(3) = -3(3^2) + 4(3) + 5

g(3) = -3(9) + 12 + 5

g(3) = -27 + 12 + 5

g(3) = -15 + 5

g(3) = -10

The four corners of a square are 90 degrees.

They are evenly split by the diagonal lines, so each corner is now two 45 degree angles.

The lines form triangles, which have 3 angles that need to equal 180 degrees.

Two of the angles are 45, so 45 + 45 = 90 degrees.

X = 180 -90 = 90 degrees.

Answer:

90 degrees

By 90 * 4 is 360

Step-by-step explanation:

I just got my g mail and I went in during the middle of the class

Answer:

hi :)

Step-by-step explanation:

Answer:

2-(-3)=2+3=5

-7+4=-3

Step-by-step explanation:

Answer:

2 - (-3) is 5 because (-) × (-) is (+)

And for -7 + 4 is 3 because (-) × (+) is (-).

Answer:

The x intercept is (-15/4 ,0)

Step-by-step explanation:

To find the x intercept, set y = 0 and solve for x

y = 4x+15

0 = 4x+15

subtract 15 from each side

-15 = 4x+15-15

-15 = 4x

Divide by 4

-15/4 = 4x/4

-15/4 = x

The x intercept is (-15/4 ,0)

Answer:

x = 10

Step-by-step explanation:

a² + b² = c²

6² + 8² = c²

36 + 64 = 100

√100 = ±10

x = 10

Answer:

10

Step-by-step explanation:

We can use the Pythagorean Theorem to find the value of x.

It states that in a right triangle, [tex]a^2 + b^2 = c^2[/tex].

A and b are the sides, while c is the hypotenuse.

We already know the measure of a and b, so we can find the measure of c easily.

[tex]6^2 + 8^2 = c^2\\\\36+64=c^2\\\\100=c^2\\\\10=c[/tex]

Hope this helped!

Ok so there are two ways to do this kind of pre-algebra.

I'm going to do it the way I learned it, and the way they teach you in schools.

Ok so you want the variables on one side and the constant term (normal numbers) on the other side (of the equation).

So to do that you have to bring the 6 to the right side.

17h=40+6

Except when you move it to the other side you have to change the sign in front of it.

+ → -

- → +

× → ÷

÷ → ×

In this case, there is an addition sign in front of the 6.

So + → - and the final equation is...

17h=40-6

If you want to do it the way they do it in schools, then you have to remove 6 from both sides (so it will still be equal).

17h+6=40

You have to subtract 6 from (17h+6), which would be 17h.

Then you have to subtract 6 from (40), which would be 40+(-6) or 40-6

The final equation is 17h=40-6

Ok so 40-6=34.

So 17h=34

Divide 34 by 17 or divide each side by 17.

h=34/17 or 2

♡ Hope this helped! ♡

❀ 0ranges ❀

Answer:

40-6=34.

So 17h=34

Divide 34 by 17 or divide each side by 17.

Step-by-step explanation:

Hope this helps!

Answer: 6 cm

Step-by-step explanation:

Given: The ratio of the areas of two similar  parallelograms is 4:9.

To find : The height of the  bigger one if the smaller is of height 4 cm.

Let h be the height of the  bigger one.

Since the areas of similar figures are proportional to the square of their corresponding sides.

Then, [tex]\dfrac{4^2}{h^2}=\dfrac{4}{9}[/tex]

[tex]\dfrac{16}{h^2}=\dfrac{4}{9}\\\\\Rightarrow\ h^2=\dfrac{9}{4}\times16\\\\\Rightarrow\ h^2=36\\\\\Rightarow\ h= 6\ cm\ \ \ \ \text{[ height cannot be negative.]}[/tex]

Hence, the height of bigger parallelogram = 6 cm

Answer:

2b - 2a

Step-by-step explanation:

AB = AO + OB

     = - 2a + 2b = 2b - 2a

Answer:

- 55

Step-by-step explanation:

a = −6, b = −5

Answer:

Let's call x as the number of friends, now, in Theatre A we have:

Price for x tickets = x*$14.50

price for 3 tubs of popcorn = 3*$5.75 = $17.25

Total price:

Pa(x) = $14.50*x + $17.25

Now, for Theatre B we have:

Price for x tickets = $13*x.

Price for 3 tubs of popcorn: = 3*$6.75 = $20.25

Total price:

Pb(x) = $13*x + $20.25.

Now, we can find the number of friends x in such case that they will pay the same in each theater by:

Pa(x) = Pb(x)

$14.50*x + $17.25 = $13*x + $20.25.

Now we solve this for x:

($14.50 - $13)*x = $20.25 - $17.25 = $3

$1.50*x = $3

x = $3/$1.50 = 2.

Then, if there are 2 friends, they will pay the same in both theatres

If there are more tha 2 friends, the cheaper place will be Theatre B, because the slope is smaller, which means that for each additional ticket the total price will increase less.

Answer:

its b

Step-by-step explanation:

tta be just trust me

Answer:

It's B and the length of the third side of the triangle is 9cm.

Step-by-step explanation:

One of the two equal sides  S. Both of them  2S. The third side is 2S5. The perimeter is 2S2S5 and that's 23. So 4S5 23, then 4S28, and S7. The third side is 2S5, and that's 9.

Answer:

b = √2

Step-by-step explanation:

Pythagorean Theorem: a² + b² = c²

a = Leg₁

b = Leg₂

c = Hypotenuse

Step 1: Plug in variables

3² + b² = (√11)²

Step 2: Solve

9 + b² = 11

b² = 2

b = √2

And we have our answer!

Answer:

6103.07 inches ^ 3

Step-by-step explanation:

Step 1: Find the volume of the head

d = 12

r = d/2

r = 6

[tex]=\frac{4}{3} (3.14)6^{3} \\=904.78 inches^{3}[/tex]

Step 2: Find the volume of the body

d = 16

r = d/2

r = 8

[tex]=\frac{4}{3} (3.14)8^{3} \\=2144.66inches^{3}[/tex]

Step 3: Find the volume of the legs

d = 18

r = d/2

r = 9

[tex]=\frac{4}{3} (3.14)9^{3} \\=3053.63 inches^{3}[/tex]

Step 4: Add the volumes together

[tex]904.78 +2144.66+3053.63=Volume[/tex]

[tex]6103.07=Volume[/tex]

Therefore the volume of the snowman is 6103.07 inches ^ 3

Answer:

You wont have any coins left. You will have a negative number of coins because 20 x 4 = 80. 80 - 50 = 30. You will need to owe 30 coins

Answer:

see below

Step-by-step explanation:

x⁵ - 8x⁴ + 22x³ - 26x² + 21x - 18 = 0

x = 2,  x = ± i,   x=3  with multiplicity 2

-----------------------------------------------------

x⁴ - 5x³ + 7x² - 5x + 6 = 0

x = 2,   x=3,   x = ± i

--------------------------------------------------------

-1 + 4i    =  4 + i

    i

--------------------------------------------------------

x³ - 26x² + 21x - 18 = 0

x = ± 2i,   x = 3/2

--------------------------------------------------------

(1 + i) (-3 - 4i)

= 1 - 7i

--------------------------------------------------------

6.

(-5 + 2i) + (3 - 6i)

= -2 -4i

--------------------------------------------------------

7.

x⁴ + 5x² + 4 = 0

x = ± i ,     x = ± 2i

--------------------------------------------------------

8.

(7 - i) - (-5 + 6i)

= 12 - 7i

--------------------------------------------------------

9.

(4 - i) (4 + i)

= 17

--------------------------------------------------------

10.

(3 + 8i) (4 - 3i)

= 36 + 23i

Answer:

x = 3

Step-by-step explanation:

What you wrote, x + 8/x - 3 means [tex] x + \dfrac{8}{x} - 3 [/tex].

I assume you didn't mean that, but instead, you mean

[tex] \dfrac{x + 8}{x - 3} [/tex], so I'll use this expression in the problem.

A fraction cannot have zero in the denominator since division by zero is undefined and not allowed. The denominator of the fraction is x - 3.

We need to find which value of x makes the expression x - 3 have a value of zero. Then that is the value of x that must be excluded from the domain.

We set the denominator equal to zero, and we solve for x.

x - 3 = 0

Add 3 to both sides.

x = 3

A value of 3 used for x makes the denominator equal zero, so the real number for which the expression is undefined is

x = 3.

Answer:

[tex](-3,-12)[/tex]

[tex]x=-3, y=-12[/tex]

Step-by-step explanation:

So we have the system:

[tex]3x+y=-21\\y=4x[/tex]

To solve this, we can do some substitution. Substitute the y in the first equation for the 4x in the second:

[tex]3x+y=-21\\3x+(4x)=-21[/tex]

Combine like terms:

[tex]7x=-21[/tex]

Divide both sides by 7. The left side cancels:

[tex](7x)/7=(-21)/7\\x=-3[/tex]

So we determined that x is -3. Now, plug this number back into the second equation:

[tex]y=4x\\y=4(-3)=-12[/tex]

So the solution is:

[tex](-3,-12)[/tex]

Answer:

[tex]\Large \boxed{x=-3 \ } \\ \\ \Large \boxed{y=-12}[/tex]

Step-by-step explanation:

3x + y = -21

y = 4x

Substitue y = 4x in the first equation.

3x + 4x = -21

Combine like terms.

7x = -21

Divide both sides by 7.

x = -3

Let x = -3 for the second equation.

y = 4(-3)

Multiply.

y = -12

The solution for the system of equations is x = -3 and y = -12.

Answers:

Domain = [tex][-5, -2] \cup [1,5)[/tex]

Range = [tex](-4,4][/tex]

=============================================

Explanation:

The domain is the set of allowed x value inputs. We note that the left-most point is when x = -5, and this point has a closed or filled in endpoint, so we're including this x value in the domain.

The left piece has its other endpoint at x = -2, so the interval [tex]-5 \le x \le -2[/tex] is part of the domain. We write that as [tex][-5,-2][/tex]is part of the domain's answer. The other part is [tex][1, 5)[/tex]. We include x = 1 but exclude x = 5 as there's a hole here.

Use the union symbol to glue the two intervals together and we end up with [tex][-5, -2] \cup [1,5)[/tex] as the full domain.

----------------------------

The range is the set of possible y values. The lowest point is when y = -4, but we exclude this endpoint since there's an open hole here. The highest point is when y = 4. The range is [tex]-4 < y \le 4[/tex] which we write as [tex](-4, 4][/tex]

Since there are no gaps in the range, we don't use any union symbols here. Any y value between -4 and 4 is possible, other than y = -4 itself.

the building is twenty feet

Step-by-step explanation:

Answer:

20

Step-by-step explanation:

Answer:

Step-by-step explanation:

[tex]1-5\left(3+2\cdot \:3\right)=-44\\\\Follow\:the\:PEMDAS\:order\:of\:operations\\\\\mathrm{Calculate\:within\:parentheses}\:\left(3+2\cdot \:3\right)\::\quad 9\\\\=1-5\cdot \:9\\\\\mathrm{Multiply\:and\:divide\:\left(left\:to\:right\right)}\:5\cdot \:9\::\quad 45\\\\=1-45\\\\\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:1-45\:\\\\:\quad -44[/tex]

Answer:

-36

Step-by-step explanation:

1-5(3+2x3)

-4(3+2x3)

-4(3+6)

-12-24

-36

Hope this helps ;) ❤❤❤

Answer:

  √89

Step-by-step explanation:

The distance formula is good for this.

  d = √((x2 -x1)^2 +(y2 -y1)^2)

  d = ((6 -(-2))^2 +(-1-4)^2) = √(64 +25)

  d = √89

The distance between the point is √89 units.

Answer: $112.50 ; $4612.5

Step-by-step explanation:

a) Determine how much interest Christine paid at the end of 1 year.

This will be:

Simple interest = PRT/100

where

P = principal = $4500

R = rate = 2.5%

T = time = 1 year

Interest = (4500 × 2.5 × 1)/100

= 11250/100

= $112.50

b) Determine the total amount Christine will repay the bank at the end of 1 year.

Total amount = Principal + Interest

= $4500 + $112.50

= $4612.5

Answer:

[tex] \alpha + \beta = \sqrt{2} [/tex]

[tex] \alpha \beta = \frac{1}{3} [/tex]

The quadratic equation is given by

[tex]y = {x}^{2} - ( \alpha + \beta )x + \alpha \beta [/tex]

[tex]y = {x}^{2} -x \sqrt{2} + \frac{1}{3} [/tex]