Guys I need help please actually answer and explain! Will mark brainlest!

I need the answer for part b and c of number 23.

Answer:

85°

Step-by-step explanation:

So in geometry, the formula to find the sum of all interior angles is denoted as follows:

n = number of sides in the polygon

( n - 2 ) × 180° = sum of the interior angles

Using that formula, a triangle has 3 sides, so

n = 3 , therefore:

= ( 3 - 2 ) × 180°

= 1 × 180°

= 180°

Since the total sum of the interior angles of a triangle all have to add up to 180°, you can create the following equation and solve:

34° + 61° + x = 180°

Solve for x.

Answer:

Reasonable prediction = 240 students

Step-by-step explanation:

Given that:

6 out of every 8 students own a pet.

Ratio = 6 : 8

Number of students surveyed = 320

Predicted number of students who own pets = x

Ratio = x : 320

As the relationship is proportional;

6 : 8 :: x : 320

Product of mean = Product of extreme

8x = 320 * 6

8x = 1920

Dividing both sides by 8

[tex]\frac{8x}{8}=\frac{1920}{8}\\x=240[/tex]

Hence,

Reasonable prediction = 240 students

Answer: (hope I got them correct)

A) -15/7

B) [tex]y=-\frac{15}{7}x-\frac{4}{7}[/tex]

C) It cuts the x-axis at (-4/15,0) and the y-axis at (0,-4/7).

Step-by-step explanation:

A) Slope = [8-(-7)]/(-4-3) = -15/7

B) Let [tex]y=-\frac{15}{7}x+c[/tex] be the required equation.

Substitute x=-4, y=8.

8=(-15/7)(-4)+c

c=-4/7

The equation is therefore [tex]y=-\frac{15}{7}x-\frac{4}{7}[/tex].

C) Substitute y=0, we will get x = -4/15 i.e. it cuts the x-axis at (-4/15,0).

Substitute x=0, we will get y = -4/7 i.e. it cuts the y-axis at (0,-4/7).

Answer:

$49.50

Step-by-step explanation:

Simple interest formula => interest = principal x rate x time period

interest = 500 x .033 x 3 years

interest = 49.50

I hope this helps!

-TheBusinessMan

Answer:

Positive Roots: 2 or 0

Negative Roots: 1

Step-by-step explanation:

  f (x) = 6x3 − 3x2 + 5x + 9

To find the possible number of positive roots, look at the signs on the coefficients and count the number of times the signs on the coefficients change from positive to negative or negative to positive.

  f (x) = 6x3 − 3x2 + 5x + 9

Since there are 2 sign changes from the highest order term to the lowest, there are at most 2 positive roots (Descartes' Rule of Signs). The other possible numbers of positive roots are found by subtracting off pairs of roots (2 − 2).

Positive Roots: 2 or 0

To find the possible number of negative r oots, replace x with −x and repeat the sign comparison.

  f (−x) = 6(−x)3 − 3(−x)2 + 5 (−x) + 9

Simplify each term.

  Apply the product rule to −x.

     f (−x) = 6 ((−1)3x^3) − 3(−x)^2 + 5 (−x) + 9

   Raise −1 to the power of 3.

     f (−x) = 6 (−x^3) − 3(−x)^2 + 5 (−x) + 9

   Multiply −1 by 6.

     f (−x) = −6x^3 − 3(−x)^2 + 5 (−x) + 9

   Apply the product rule to −x.

     f (−x) = −6x^3 − 3 ((−1)^2(x^2)) + 5 (−x) + 9

Raise −1 to the power of 2.

     f (−x) = −6x^3 − 3 (1x^2) + 5 (−x) + 9

Since there is 1 sign change from the highest order t erm to the lowest, there is at most 1 negative

root (Descartes' Rule of Signs). Negative Roots: 1

The possible number of positive roots is 2 or 0, and the possible number of negative roots is 1. Positive Roots: 2 or 0

Negative Roots: 1

True,

-4x=-28

Divide by -4 on both sides and since the negatives cancel eachother, you're left with x=7

Answer:

the amount of miles he runs (m) is independent and the number of calories (c) he burns is dependent

Answer:

I believe c.

Step-by-step explanation:

Answer:

its a i did it and it was correct

Step-by-step explanation:

Answer:

[tex]\frac{x-5}{x+1}[/tex], [tex]x\neq -1, x\neq -9[/tex]

Step-by-step explanation:

x^2 + 4x - 45

= (x+9)(x-5)

x^2 + 10x + 9

= (x+9)(x+1)

So the fraction goes to

[tex]\frac{(x+9)(x-5)}{(x+9)(x+1)}[/tex] which is [tex]\frac{x-5}{x+1}[/tex].

Since the denominator cannot be 0, x^2 + 10x + 9 cannot be equal to 0. Therefore x cannot be -1 or -9.

Answer:

mathm waaayys can help you

Step-by-step explanation:

Answer: 720,000,000,000

Step-by-step explanation: Find your answer by multiplying the 2 percent's.

Let p, equal percent.

800000000.0%x9000000.0% = p

800000000.0%x9000000.0% = 720,000,000,000

720,000,000,000  = p

Answer:

406789

Step-by-step explanation:

Answer:

Ok ill help u ! What do u need help on?

Answer:

x=2;DE,EF=9,DF=5

Step-by-step explanation:

Since DEF is isoceles, you can set the equations

x+7 and 2x+5 equal to each other

x+7=2x+5, now solve for x

-x=-2,

x=2, now plug in for each side

DE,EF=9

DF=3(2)-1=5

Answer:

28+28=56 so 28 and 28 and the bottom will be 56

Answer:

2x+5y=103

Step-by-step explanation:

x=price per box of grapefruit

y=price per box of oranges

Answer:

That would be 40%.

Answer:

348,750 dollars in 3 years

Step-by-step explanation:

   You inheritanced 15,500 dollars. You put that into a account which has a 7.5% interest rate for one year. 15,500 x 7.5 = 116,250 a year. now you want to know how much that'll be in 3 years multiply 116,250 x 3 = 248,750.

(I'm sorry if this is incorrect i tried doing the math correctly!)

Answer:

Step-by-step explanation:

I = P x r x t

p=15500

i=7.5% must change to decimal of 0.075

t= 3 (years)

In this case

I= 15,500 X 0.075 X 3=  3,487.5

(1, 162.5 x 3)= 3487.5

Solved to nearest dollar of 3,488

Answer:

Step-by-step explanation:

(6-2i)(2-3i)=

we will use foil to multiply

-12-18i-4i+6(i^2)=

now remeber that (i^2)=-1

=12-22i-6=6-22i

Explanation: To multiply two complex numbers, use the F.O.I.L method.

So we have (6 - 2i)(2 - 3i).

So we have 12 - 18i - 4i + 6i².

Combining like terms, we have 12 - 22i + 6i².

Now, remember that i² is equal to -1 so we have

12 - 22i + 6(-1) or 12 - 22i - 6 or 6 - 22i.

So our answer is 6 - 22i.

Answer:

slope = -4

Step-by-step explanation:

slope formula is

slope = y2-y1/x2-x1

as we know that from the question x1 = 3 , y1 = 0

and x2 = 2 , y2 = 4

then put these equation in the slope formula and we get slope which is equal to (-4)

Answer: blank = 2

Step-by-step explanation:

i checked the denominators to see if they had some form of correlation. i did this with the denominators because both of them were given. i saw that 16 is twice the number of 8, so i just said "what is twice the number of 1?" and got my answer.

Answer:

2

Step-by-step explanation:

Trippie is amazing, good job. What's your favorite song from him mine is Excitement.

Answer:

3.38

Step-by-step explanation:

first do the multiplication

2×0.81

= 1.62

then the subtraction

5- 1.62= 3.38

Answer:

The rule: Adds twice as much as the previous number added

Next number: 38

Step-by-step explanation:

Answer:

36

Step-by-step explanation:

The rule is every time you add 2 so 6 plus 2 equals 8 them you would do 8+4=12. your counting by 2 as u go up the line.