Mathematics High School

r 2- 12r - 28 = 0[tex]r 2- 12r - 28 = 0[/tex]

Answers

Answer 1

Answer:

Step-by-step explanation:

r² - 12r - 28 = 0

r² - (14 - 2)r - 28 = 0

r² - 14r + 2r - 28 = 0

r ( r - 14 ) + 2 ( r - 14 ) = 0

( r - 14) ( r + 2 ) = 0

Either

r - 14 = 0

r = 14

or

r + 2 = 0

r = -2

therefore r = - 2 or 14

Related Questions

I’m not smart so help me please get it right

Answers

Answer:

Surface area = 148cm^2

Volume = 120cm^2

Step-by-step explanation:

You are smart don't say you're not. :)

Answer:

Surface Area is 148 cm^2

Your Volume will be 120 cm ^3

Step-by-step explanation:

Surface Area you get by getting the area of each of the 2 dimensional shapes, the formula to get the surface area for a rectangualr prism is 2(wl+hl+hw), so you would plug in 2((5(6))+((4(6))+(4(5)) which will give you 2((30)+(24)+(20)) which will then give you 2(74) and the final answer will be 148 cm^2

The formula for Surface Area is w(l)(h) so in this case it will be 5(6)(4) which will be 30(4)= 120 cm^3

Hope this helps  

What is the value of x in the equation below? 3x - 15 = 60

Answers

Answer:

3x=60+15

x=75/3

x=25

Thus the answer is 25

Answer:

[tex]3x - 15 = 60 \\ 3x = 60 + 15 \\ 3x = 75 \\ x = \frac{75}{3} \\ x = 25[/tex]

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

Help needed for some geometry

Answers

In order to create a line parallel to line “I”, rotate line “I” 180° about points “F”. This can be done clockwise or counterclockwise.

Answer:

hope this help you. look it once.

4.2 decreased by the quantity 12 plus a number

Answers

Answer and Step-by-step explanation:

This is the same thing as:

4.2 - (12 + x)

The 4.2 is being subtracted by the value of 12 and a number, denoted as x.

#teamtrees #PAW (Plant And Water)


a) If there were 3 elephants at the zoo, how many hippos would there be?

Answers

Answer:

3 as well lol?

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

The length of a football field is 120 yards from one and one to the other end zone.​

Answers

Answer:

To solve, you need to use Pythagorean Theorum

a^2+b^2=c^2

100^2+53.33^2 = c^2

10,000+2844.0889=c^2

12844.1=c^2

square root

= 113 1/3 yards

So it is less than 120 yards

Step-by-step explanation:

Here's a primer on how the dimensions play out at every level, from high school football to the NCAA and on up to the NFL. There are two constants, across the level of competition: 120 yards (360 feet) of length and 53 1/3 yards (160 feet) of width.

i think this is what your looking for?!

During the first two weeks at his new job Damian earned a total of $500 he earned x dollars during the first week during the second week he earned 4 times as much as he did the first week. How much did Damian earn during the first week

Answers

Answer:

$100

Step-by-step explanation:

x + 4x = 500

5x = 500

x = 100

Can anyone help me with this math please I will give brainlist

Answers

Answer:

4.5 > 4.420

0.67 < 0.8

0.82 = 0.820

62.4 > 6.24

0.13, 0.3, 0.303, 0.32

0.08, 0.8, 0.82, 8.2

24.54, 24.4, 24.304, 24.24

6.5, 6.25, 6.05, 6.007

Step-by-step explanation:

The most useful way to compare fractions is to add extra zeros at the end.

For example, 0.67 ___ 0.80.

0.80 is obviously bigger than 0.67.

In 24.4, 24.54, 24.304, 24.24, you can add extra zeros as well.

24.400, 24.540, 24.304, 24.240 (This makes it much easier to group the numbers, whether from largest to smallest or smallest to larger).

**REMEMBER TO REMOVE THOSE ZEROS AFTER FINDING YOUR FINAL ANSWER**

What is the value of x?
to
x = [?]°

Answers

The horizontal in a pair of coordinates how far along tje point is ,so i cant tell u the awnser exactly but i can give explanation

HELP, I can't figure out the first question
Answer choice for first question
1. linearly
2.quadratically
3.exponentially

Answers

The answer is linearly

Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks. Tori hosts a podcast about computers, and Wendy hosts a podcast about parenting. Both podcasts have a set duration for each episode. Last year, Tori released 40 episodes and Wendy released 16 episodes, for a total of 5,584 minutes of content. This year, Tori released 27 episodes and Wendy released 11 episodes, which lasted a total of 3,795 minutes. How long is each episode? Each episode of Tori's podcast is minutes long, and each episode of Wendy's podcast is minutes long.

Answers

Answer:

x = minutes of Tori's podcast = 88 minutes

y = minutes of Wendy's podcast = 129 minutes

Step-by-step explanation:

Let

x = minutes of Tori's podcast

y = minutes of Wendy's podcast

40x + 16y = 5,584 (1)

27x + 11y = 3,795 (2)

Multiply (1) by 11 and (2) by 16

440x + 176y = 61,424 (3)

432x + 176y = 60,720 (4)

Subtract (4) from (3) to eliminate y

440x - 432x = 61,424 - 60,720

8x = 704

x = 704/8

x = 88

Substitute x = 88 into (1)

40x + 16y = 5,584 (1)

40(88) + 16y = 5,584

3,520 + 16y = 5,584

16y = 5,584 - 3,520

16y = 2,064

y = 2,064/16

y = 129

x = minutes of Tori's podcast = 88 minutes

y = minutes of Wendy's podcast = 129 minutes

At a fair 15% less people attended on Monday than the number of people who attended on Sunday. If 425 people attended on Monday, find the number of people who came to the fair on Sunday

Answers

Answer: 500

Step-by-step explanation:

let we suppose x people went to the fair on Sunday.

now number of people attend the fair on monday=x-15%of x.

x-15x/100=100x-15x/100

85x/100

A/q

85x/100=425

85x=42500

x=42500/85

500

so, 500 people. attended the fair on sunday

Need answer please on this question

Answers

Answer:

answers are a d and b

Step-by-step explanation:

Simplificación de la raíz cuadrada de 50

Answers

Answer: 5√2

Step-by-step explanation:√50--->√2*√25

√25--->5

5*√2=5√2

a cat is stuck on the root. if the ladder is 16 feet long and must be placed six feet away from the building. how high can the ladder reach up the building to help save the cat

Answers

Step-by-step explanation:

a^2 + b^2 = c^2

height + 6^2 = 16^2

height = 14.83

Determine if the expression 9y^5+ y − 3y^3is a polynomial or not. If it is a
polynomial, state the type and degree of the polynomial.

Answers

It is a polynomial equation. The degree is 5

find the value using identities (302)3

Answers

Answer:

108,000,934

1.08934×10^8

Step-by-step explanation:

(302)^3

(a+b)^3

(a+b)^3==a^3+3a^2b+3ab^2+b^3

(300+2)

(300)^3+3(300^2+2)+3(300+2^2)+2^3

27,000,000+81,000,002+8+924

108,000,002+8+924

108,000,934 or 1.08934×10^8

Que números son divisibles entre 5 y 10 a la vez

Answers

Answer:

5

Step-by-step explanation:

Solve by Elimination:
x + 6y = 28
2x - 3y = -19

Answers

Answer:

x=-2

y=5

Step-by-step explanation:

x=28-6y

2x-3y=-19

(substitute the value of x)

2(28-6y)-3y=-19

y=5

x=28-6*5

x=-2

mr jones is painting a wall in his office. he has enough paint to cover 104 square feet . the wall he is painting is 12 feet wide and 9 feet long. Does he have enough paint to cover the wall

Answers

Answer:

no

Step-by-step explanation:

9x12=108

108 square feet so not enough paint.

needs more paint that covers 4 square feet

If two sides of a triangle measure 4 cm and 6 cm what could be the measure of the third side? A. 9 B. 10 C. 11 D. 12

Answers

Answer:

A. 9

Step-by-step explanation:

Triangle Inequality:  the lengths of any two sides of a triangle add up to more than the third side.

B. 10 can't be the answer because the 4 cm and 6 cm sides would just meet at a point on the 10 cm sides.

C. 11 and D. 12 can't be answers because the 4 cm and 6 cm sides would not meet (kind of like windshield wipers that are too short).

CAN SOMEONE HELP PLEASE

Answers

Point of intersection where the two lines meet is at (3, -2)

Answer:

Point of intersection where the two lines meet is at (3, -2)

Step-by-step explanation:

(15 POINTS AHH) Which of the following square roots is irrational?

Answers

Answer:

Triangle

Step-by-step explanation:

The square root of 99 is irrational.

Answer:

the triangle square root of 99

Step-by-step explanation:

determine the value of x (ill give brainliest)

Answers

Answer:

I believe the answer is 7

Answer:

12

Step-by-step explanation:

9 * 12 - 2 = 61

7 * 12 + 12 = 61

I need help with this problem due tonight 10 points!!!

Answers

Answer:

The value of the slope of the line is 1

Step-by-step explanation:

Here, we want to find the value of the slope of the line that passes through the given points

Mathematically, we have the equation as;

m = (y2-y1)/(x2-x1)

(x1,y1) = (4,-11)

(x2,y2) = (7,-8)

substituting these values in the slope equation, we have;

m = (-8-(-11))/(7-4) = 3/3 = 1

expression expression expression expression expression expression expression expression expression expression expression expression expression expression expression

Answers

Answer:

expression

Step-by-step explanation:

expression expresssion

Yani buys 4 dozen flyers for $7.25. What is
the cost of 12 dozen?
helppp now plz

Answers

Answer:

$21.75

Step-by-step explanation:

Divide $7.25 by 4 then multiply what you get from that by 12

Help me on this please

Answers

Answer:

Radius = 3

Since radius is half of diameter diameter is 6 because 3 x 2= 6

Now I multiply that by pi so...

6 x 3.14 = 18.84 So 18.84 is our answer.

Your question of the day

What makes a good student? Explain? Why?

Answers

Answer:

a good student someone that pays attention in class and studies. If they do the work, study and pay attention there should be no issues. most teachers like students like that and the should be able to pass the class.

WHAT IS THE MEDIAN pls help

Answers

Answer:

63

Step-by-step explanation:

If you put them from least to greatest order you cross out from both ends until you get to the middle, in that case I got to the middle in between 63 and 63 so you can go in between them so your answer is 63

It’s the numbers in the middle so it would be a number in between 80 and 63.
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