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rodikova [14]
4 years ago
10

Questions attached below ( *︾▽︾) Thanks for the help :)

Mathematics
1 answer:
german4 years ago
8 0

Answer:

See below

Step-by-step explanation:

Attachment 1 : (a) Remember that it mentions x is the years since 1900. That would mean that the table is a bit different. To create this " new table " simply subtract 1900 from the years provided, and substitute.

To create this equation we will need a regression calculator. The equation will be as follows.

y = 0.125873x - 7.11916 ( note that you can double check this equation be substituting points from the table in the attachment )

(b) 2025 - 1900 = 126 years,

y = 0.125873(125) - 7.11916 = $ 8.614965

Minimum Wage : $ 8.614965

Attachment 2 : The rest of the problems can be solved similarly...

(a) Quadratic Regression Equation : - 0.49311x² + 23.2798x + 996.029

(b) - 0.49311(20)² + 23.2798(20) + 996.029 = 1264.381 mg/cm³

Attachment 3 : (a) Exponential Regression : 9.08292(1.09965)ˣ

(b) 9.08292(1.09965)⁶⁰ = 2713.27743\dots ( About 2713 recommendations )

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Ivan
(5y - 1) + (-2y + 4)  = 5y - 1 - 2y + 4
                              = 5y - 2y - 1 + 4
                              = 3y + 3    [OPTION B] 
8 0
3 years ago
Solve for x <br> 3x+4 = (2/5)x +2
julsineya [31]

Answer:-10/13

Step-by-step explanation:

3x+4 = (2/5)x + 2

First move the 4 to the other side by subtracting it.

it becomes : 3x = (2/5)x - 2

then multiply everything by 5 to get rid of the fraction.

it becomes 15x = 2x -10

then move the 2x to the other side by subtracting it.

you get 13x = -10

now you can divide everything by 13 to isolate the x.

and you get x = -10/13

3 0
3 years ago
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if it takes 60 minutes for 9 people to paint 5 walls thhen how many minutes does it take for 4 people to paint 6 walls
adoni [48]

--  9 people paint 5 walls in 60 minutes

--  9 people paint (5 / 5) = 1 wall in (60 / 5) = 12 minutes

--  (9 / 9) = 1 person paints 1 wall in (9 x 12) = 108 minutes

-- 1 person paints (1 x 6) = 6 walls in (108 x 6) = 648 minutes

-- (1 x 4) = 4 people paint 6 walls in (648 / 4) = 162 minutes .
 
8 0
4 years ago
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Solve the system of equations: y=4x-3, y=-2x+9
Lyrx [107]

Answer:

y= 5

x= 2

Step-by-step explanation:

y = 4x - 3 ... (1)

y= -2x +9.... (2)

Multiply equation (2) by 2

It becomes;

2y = -4x +18 ...(3)

Add equation (3) and (1)

It becomes;

3y = 15

y = 5.

Substitute y = 5 in equation (1)

It becomes;

5 = 4x -3

Collecting like terms:

4x = 5 + 3

4x = 8

x = 8/4

x = 2

3 0
4 years ago
A right cylindrical container perfectly holds 5 tennis balls placed one above the other. The radius of each ball is 3.35 centime
mash [69]

Answer: 394 cm3


Step-by-step explanation:

volume of cylinder - volume of 5 balls=extra volume

voc=πr2h=1181.09

pi=22/7

r=3.35

h= 5 x diameter of ball=33.5 (diameter = 2r)


vo5b=5(4/3πr3)=787.4

r=3.35

ev=voc-vo5b

=393.69


ROUND TO 394

5 0
3 years ago
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