R=-6 and t=3. what is 12-t | 3r-2 |

Answers

Answer 1

Answer: 12 - t|3r - 2|

r = -6; t = 3

subtitute:

12 - 3 · |3 · (-6) - 2| = 12 - 3 · |-18 - 2| = 12 - 3 · |-20| = 12 - 3 · 20 = 12 - 60 = -48

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For what values of k does the equation x^2 - (5k+1)x + 9k^2 = 0 have real roots?

Answers

K has a range from[ -1/11 to 1]

real roots occur when the determinant b^2-4ac >= 0

so substituting:-

(5k + 1)^2 - 4*1* (9k^2) >= 0
25k^2 + 10k + 1 - 36k^2 >= 0
-11k^2 +10k + 1 >= 0
11k^2 - 10k - 1 <= 0
(11k + 1)(k - 1) <= 0

the equation will have real roots for -1/11 =< k <= 1

If 8 men can chop down 28 trees in one day, how many trees can 20 men chop down in
one day?

Answers

The number of trees that 20 men chop down in one day will be 70.

What are ratio and proportion?

A ratio is a group of sequentially ordered numbers a and b expressed as a/b, where b is never equal to zero. When two objects are equal, a statement is said to be proportional.

If 8 men can chop down 28 trees in one day.

Let 'x' be the number of trees.

We know that the ratio of man and tree will remain constant. Then the equation is given as,

28 / 8 = 20 / x

Simplify the equation, then we have

8 / 28 = 20 / x

x = 20 (28 / 8)

x = 70

The number of trees that 20 men chop down in one day will be 70.

More about the ratio and the proportion link is given below.

brainly.com/question/14335762

#SPJ2

28 / 8 = 3.5
20 x 3.5 = 70
20 men can chop down 70 trees

The sum of the digits of a two-digit number is 9. If the digits are reversed, the new number is 27 less than the original. Find the original number.

Answers

I did another one just like this about an hour ago. I did it the elegant, tedious way,
and it took about 2 feet of screen. Then I realized there was a totally bourgeois but
easy way to do it. For 5 points, I'll give you the method for the masses:

List all the possible pairs of digits that add up to 9, along with their flips:

18 . . . . . 81
27 . . . . . 72
36 . . . . . 63
45 . . . . . 54

Do you see any pair that are different by 27 ?
How about 36 and 63 ?

So the original number is 63, and when you flip it, it becomes 36, which is 27 less.

Find the product. x 3(x 2 5x 1) x 6 5x 4 x 3 x 5 5x 4 x 3 x 5 5x 3 x 3

Answers

$x^(3) ( x^(2) +5x+1)= x^(5) +5 x^(4) + x^(3)$

Find the length of x

Answers

Answer:

Step-by-step explanation:

Law of Sines:

Sin(a)/opposite side=Sin(b)/opposite

Sin(55)/x=sin(90)/59

Sin(55)/(Sin(90)/59)

sin(90)=1

Sin(55)/(1/59)

59Sin(55)=48.33

Please mark brainliest :)

Remmi wrote the equation of the line y=1/3(x+2) He solved for x and got x=3y-2 Which of the following is an equivalent equation for x?a. x=y-11/3
b. x=y+7/3
c. x=3(y-2/3)
d. x=3(y+2/3)

Answers

By examining the choices, it can be noted that the equivalent equation is obtained by factoring 3 out of the right side of the equation, x = 3y - 2 which will give an answer of x = 3(y - 2/3). Thus, the answer is letter C.

Just took the quiz.

The answer is x=3(y-2/3)

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36 & 64 are both square numbers. They Have a sum of a 100 Find Two Square numbers that have a sum of 130

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