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3 years ago

Translate the phrase into a math expression.

Mathematics

2 answers:

Art [367]3 years ago

8 0

Im absolutely positive it is D i promise

Ierofanga [76]3 years ago

4 0

It is B because your question says 12 LESS THAN twice a number

First you have to put the (twice a number) which would be 2n or 2•n either would work....

Then subtract out 12 from 2n or 2•n
As a result it is 2n-12 or 2•n-12

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Please help me with this problem!

mina [271]

Answer:

Step-by-step explanation:

The diagram shows lines passing through the points of two equations.

We will determine the points through which the lines pass through on the graphs.

Looking at the line on the right hand side of the graph, the slope is

(y2-y1)/x(2-x1) where

y2= 0, y1 = 4

x2 = 3, x1=0

Slope, m = (0-4)/3-0

Slope = -4/3

Recall the equation of a straight line is y = mx + c

Where c is the intercept.

So the equation is y

y = -4x/3 + 4

Looking at the line on the left hand side of the graph, the slope is

(y2-y1)/x(2-x1) where

y2= 0, y1 = 2

x2 = -1, x1 =0

Slope, m = (0-2)/-1-0

Slope = -2/-1 = 2

Applying equation of a straight line is y = mx + c

The equation

y = 2x + 2

So the equations are

-4x/3 + 4. If x lesser than or equal 0

2x + 2. If x greater than 0

4 0

3 years ago

At the movie theatre, child admission is $6.10 and adult admission is $9.90. On Friday, four times as many adult tickets as chil

Lena [83]

Answer:

26 child tickets

Step-by-step explanation:

4c = a to make the adult tickets equal to the child tickets multiply the child tickets by 4. then use substitution.

6.10c + 9.90(4c) = 1188.20

6.10c +39.6c = 1188.20

45.7c = 1188.20

c = 26

7 0

3 years ago

It is suspected that calcium in blood platelets may be related to blood pressure. As part of a study of this relationship, resea

mr Goodwill [35]

Answer:

Step-by-step explanation:

The null and the alternative hypothesis are:

$\mathbf{ H_o: \rho = 0} \\ \\ \mathbf{H_1: \rho \ne 0}$

The test statistics is as follows:

$t = \dfrac{r\sqrt{n-2} }{\sqrt{1-r^2}}$

$t = \dfrac{0.4 \sqrt{30-2} }{\sqrt{1-0.4^2}}$

$t = \dfrac{0.4 \sqrt{28} }{\sqrt{0.84}}$

t = 2.3094

The critical value

$t_{\alpha/df} = t_\ \{0.05/2 \ , \ 30-2 \} } \\ \\ = t_{0.025,28} = \pm 2.048 ( from \ the \ t-tables)$

Decision rule:

To reject $H_o$ if t > $t_{\alpha/df}$ .

So since t > $t_{\alpha/df}$ . we reject $H_o$ at ∝ = 0.05

Conclusion: There is sufficient evidence to conclude that blood pressure and patient calcium are linearly related.

3 0

3 years ago

1(ps4) = Y<br> Y = Your ps4 username

____ [38]

Answer:

<h2 /><h2><u><em>I guess Ill solve for Y then</em></u></h2><h2><u><em>Y = xxredd22</em></u></h2><h2><u><em></em></u></h2><h2><u><em></em></u></h2><h2>;)PLZ Mark me Brainllest or ill be sad :)</h2>

3 0

3 years ago

Read 2 more answers

Determine the equivalent system for the given system of equations:

Volgvan

Answer:

Step-by-step explanation:

5x+3y=1

4x-5y=4

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

4(5x+3y)=4(1)

-5(4x-5y)=-5(4)

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

20x+12y=4

-20x+25y=-20

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

37y=-16

y=-16/37

5x+3(-16/37)=1

5x-48/37=1

5x=1+48/37

5x=37/37+48/37

5x=85/37

x=(85/37)/5

x=(85/37)(1/5)

x=85/185

x=17/37

Answer: x=17/37, y=-16/37. (17/37, -16/37)

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

5x+3y=1

8x-10y=4

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

8(5x+3y)=8(1)

-5(8x-10y)=-5(4)

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

40x+24y=8

-40x+50y=-20

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

75y=-12

y=-12/75=-4/25

5x+3(-4/25)=1

5x-12/25=1

5x=1+12/25

5x=25/25+12/25

5x=37/25

x=(37/25)/5

x=(37/25)(1/5)

x=37/125

Answer: x=37/125, y=-4/25. (37/125, -4/25).

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

5x+3y=1

9x-2y=5

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

2(5x+3y)=2(1)

3(9x-2y)=3(5)

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

10x+6y=2

27x-6y=15

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

37x=17

x=17/37

5(17/37)+3y=1

85/37+3y=1

3y=1-85/37

3y=37/37-85/37

3y=-48/37

y=(-48/37)/3

y=(-48/37)(1/3)

y=-48/111

Answer: x=17/37, y=-48/111. (17/37, -48/111).

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

6 0

3 years ago

Read 2 more answers