2x+7+2x=19 please help quick! We also need to show work

Answer:

The temperature when Emily went to bed was -4°F.

Step-by-step explanation:

8°F + 3°F = 11°F (noon)

The temperature had risen by 3°F by noon. This means to add 3.

noon + 6°F = the day's high temperature

11°F + 6°F = 17°F (the day's high temperature)

The temperature rose another 6°F in the afternoon. This means add 6 to the temperature from noon.

high temperature - 21°F = temperature at bed

17°F - 21°F = -4°F

The temperature dropped by 21°F when Emily went to bed. This means to subtract 21 from the day's high temperature.  

Risen, rose, and increase mean addition.

Decrease, dropped, and decline mean subtraction.

Hope this helps :)

Answer:

(-0.75, -3.25) and (4.125, -2.125)

Step-by-step explanation:

Let the town, Thayer = point A(-4, -4)

Town Purdy = point D(9, -1).

Let B and C represent the two rest stops that divides the highway (AD) into 3 equal parts, namely: AB = BC = CD.

Distance of point B from A to D = ⅓ of AD.

Point C = the midpoint of point B and D.

First, using the formula for internal division, let's find the coordinates of point B:

Internal division to find the coordinates of point B is given as:

[tex] x = \frac{mx_2 + nx_1}{m + n} [/tex]

[tex] y = \frac{my_2 + ny_1}{m + n} [/tex]

Where,

[tex] A(-4, -4) = (x_1, y_1) [/tex]

[tex] D(9, -1) = (x_2, y_2) [/tex]

[tex] m = 1, n = 3 [/tex]

Plug in the necessary values into the formula stated above to solve for x and y of point B:

[tex] x = \frac{1*9 + 3*(-4)}{1 + 3} [/tex]

[tex] x = \frac{9 - 12}{4} [/tex]

[tex] x = \frac{-3}{4} [/tex]

[tex] x = -\frac{-3}{4} = 0.75 [/tex]

[tex] y = \frac{1*(-1) + 3*(-4)}{m + n} [/tex]

[tex] y = \frac{-1 - 12}{1 + 3} [/tex]

[tex] y = \frac{-13}{4} [/tex]

[tex] y = -3.25 [/tex]

The coordinates of point B = (-0.75, -3.25)

Next, find the coordinates of point C, which is the midpoint of B(-0.75, -3.25) and D(9, -1) using the midpoint formula.

Midpoint (C) of BC, for B(-0.75, -3.25) and D(9, -1)  is given as:

[tex] M(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2}) [/tex]

Let [tex] B(-0.75, -3.25) = (x_1, y_1) [/tex]

[tex] D(9, -1) = (x_2, y_2) [/tex]

Thus:

[tex] C(\frac{-0.75 + 9}{2}, \frac{-3.25 + (-1)}{2}) [/tex]

[tex] C(\frac{8.25}{2}, \frac{-4.25}{2}) [/tex]

[tex] C(4.125, -2.125) [/tex]

The rest stops should be built at (-0.75, -3.25) and (4.125, -2.125) in the coordinate plane.

Answer:

x is in the range [-1,4]

Step-by-step explanation:

I haven't worked with absolute value inequalities in awhile, but let's take a wack at this.

We are given the following inequality:

| 2x - 3 | <= 5

This implies two possible cases:

[1] -5 <= 2x -3

Or

[2] 2x - 3 <= 5

So let's solve x for both of these cases:

[1] -5 <= 2x - 3

 -2 <= 2x

 -1  <= x

[2]  2x - 3 <= 5

 2x <= 8

  x <= 4

So from these cases, we can say the following is true:

x >= -1  and x <= 4

Thus, we can write this in the form

-1 <= x <= 4

Or in interval notation:

{ x is element of reals | -1 <= x <= 4}

Also written as

x is in the range [-1,4]

Where the closed brackets represent 1 and 4 as possible answers whereas parenthesis would imply they were not.

Cheers.

Answer:

7/11 as a fraction if your talking about a fraction

Answer:

c

Step-by-step explanation:

Answer:

[tex]r'(t)=(sin(6t)+6tcos(6t),2t,cos(7t)-7tsin(7t))[/tex]

Step-by-step explanation:

We need to find the derivative [tex]r'(t)[/tex] of the vector function :

[tex]r(t)=(tsin(6t),t^{2},tcos(7t))[/tex]

In order to find [tex]r'(t)[/tex], we are going to differentiate each of its components ⇒

We can write the following ⇒

[tex]r(t)=(f(t),g(t),h(t))=(tsin(6t),t^{2},tcos(7t))[/tex] ⇒

[tex]f(t)=tsin(6t)\\g(t)=t^{2}\\h(t)=tcos(7t)[/tex]

Let's differentiate each function to obtain [tex]r'(t)[/tex] :

[tex]f(t)=tsin(6t)[/tex] ⇒ [tex]f'(t)=1.sin(6t)+t.cos(6t).6=sin(6t)+6tcos(6t)[/tex] ⇒

[tex]f'(t)=sin(6t)+6tcos(6t)[/tex]

Now with [tex]g(t)[/tex] :

[tex]g(t)=t^{2}[/tex] ⇒

[tex]g'(t)=2t[/tex]

With [tex]h(t)[/tex] :

[tex]h(t)=tcos(7t)[/tex] ⇒ [tex]h'(t)=1.cos(7t)+t[-sin(7t)].7[/tex] ⇒

[tex]h'(t)=cos(7t)-7tsin(7t)[/tex]

Finally we need to complete [tex]r'(t)=(f'(t),g'(t),h'(t))[/tex] with its components :

[tex]r'(t)=(sin(6t)+6tcos(6t),2t,cos(7t)-7tsin(7t))[/tex]

Answer:

d. 443.73

Step-by-step explanation:

i got it right on the test

Ralph approximate monthly lease payment is: d. $443. 73.

First step:

Residual value=$32,000×72%

Residual value=$23,040

Second step:

Depreciation=$32,000-$23,040

Depreciation=$8,960

Third step:

Base monthly lease payment=$8,960/36

Base monthly lease payment=$248.89

Fourth step:

Interest per month=($32,000+$23,040)×0.00354

Interest per month=$55,040×0.00354

Interest per month=$194.84

Fifth step

Monthly lease payment=$248.89+$194.84

Monthly lease payment=$443.73

Inconclusion Ralph approximate monthly lease payment is: d. $443. 73.

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Answer:

I think its c

Step-by-step explanation:

Answer: 10*1/20*1+10*1/20*3

(hints..... 1 experts =1/20*60mins and 1 dull =1/20*180mins)

Answer: Let your no.= x

double the number=2x

add 4 = 2x+4

subtract same number=2x+4-x

subtract 3=2x+4-x-3

I get my number plus 1=x+1

so equation we get

2x+4-x-3=x+1

x+1=x+1

x=x

it means  x is equal to all real number

So your number can be any real number

Answer:

  [tex](4.3\cdot 2.6)\times 10^{5+7}[/tex]

Step-by-step explanation:

All parts are multiplied. The powers of 10 are multiplied by adding their exponents. The product is formed as shown below.

Answer:

-343

Step-by-step explanation:

(-7)(-7)=49

(49)(-7)= -343

Answer:

data about a person's heartbeat, perspiration levels, respiration, and body movements.

Step-by-step explanation:

the answer to the question is that

biometric measures are useful for evaluating data like that of heartbeat, perspiration levels, respiration, body movements of a person.

Biometrics is useful for the evaluation of the physical characteristics of a person. such a measure is for authentication and security identification. the system gives allowance for certain features of a person to be recognized using biometric data and also algorithm.

Answer:

-3/2

Step-by-step explanation:

Since we have two points, we can use the slope formula

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

   = ( 7-4)/(1-3)

   = 3/-2

  = -3/2

Answer:

The answer is

Step-by-step explanation:

The slope of a line given two points can be found by using the formula

[tex]m = \frac{y_{2} -y_{1}}{x_{2} -x_{1} } [/tex]

where

(x1 , y1) and (x2 , y2) are the points

m is the slope

From the question the points are

(3,4) and (1,7)

The slope is

[tex]m = \frac{7-4}{1 - 3} \\ = - \frac{3}{2} [/tex]

We have the final answer as

[tex] - \frac{3}{2} [/tex]

Hope this helps you

Answer:

Mean- 5

Median- 6

Mode- 6

Step-by-step explanation:

1. Place the numbers in order from smallest to biggest.

0,2,3,4,5,6,6,6,7,8,8

Finding the mean (average)- add all the numbers in thd data set together. Which would be 55. Then, you would divide that number by the number of the numbers in the data set. (11 numbers.) 55/11. 55 divided by 11 is 5, so that is your answer.

Finding the median- This is why we put the numbers in order. We are finding the number that is directly in the middle of the numbers. Mark one on each side until you get to the number in the middle. In this case, the median number will be 6.

Finding the mode- This one is easy. It's simply the number that repeats itself the most. In this case it would be 6 because it repeats itself 3 times.

Answer

-4+12r

8r-6+2+4r

-6+2=-4

8r+4r=12r

Answer:

The answer is 8

Step-by-step explanation:

2x-3=13

2x=13+3

2x=16

x=8

Answer:

y=7/36

Step-by-step explanation:

Since y varies inversely to the square of x, we can say

[tex]y = z/x^2[/tex]

where z is the constant of variation.

Then, from knowing that y=7/4 when x=1, we plug them in to find z.

[tex]7/4=z/(1^2)\\z=7/4[/tex]

Now we have the full equation,

[tex]y=7/4x^2[/tex]

Plug x=3 in and we get,

[tex]y=7/4(3^2) = 7/36[/tex]

Answer:

basicly each side equals 2.25 thats the only possible way i see it but im kinda dumb

Step-by-step explanation:

Answer:

tain, duc, viv, graph

Step-by-step explanation:

Answer:

tain, duc, viv, graph Also as 3, 3, 2, 3

Step-by-step explanation:

Answer:

46

Step-by-step explanation:

[tex]f(x) = 10(3 - x) + 6 \\ f( - 1) = 10(3 - ( - 1)) + 6 \\ f( - 1) = 10(3 + 1) + 6 \\ f( - 1) = 10 \times 4 + 6 \\ f( - 1) = 40 + 6 \\ \huge \red{ \boxed{ f( - 1) = 46}} \\ [/tex]

Answer and Explanation:

Solution: The operation of concatenation for a set of string on p. and the set is

     AB = {XY | X ∈ A and y ∈ B}.

We need to satisfy all these following properties to find out the standard set is closed under concatenation.

1- Union of two standard sets also belongs to the classic collection. For example, A and B are regular. AUB also belongs to a regular group.

2- Compliment of two standards set A and B are A’ and B’ also belonging to the standard set.

3- Intersection of two standards set A and B is A∩B is also a regular set member.

4- The difference between two regular sets is also standard. For example, the difference between A and B is A-B is also a standard set.

The closure of the regular set is also standard, and the concatenation of traditional sets is regular.

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{8 + 12j}}}}}[/tex]

Step-by-step explanation:

[tex] \sf{2(4 + 6j)}[/tex]

Distribute 2 through the parentheses

[tex] \longrightarrow{ \sf{2 \times 4 + 2 \times 6j}}[/tex]

[tex] \longrightarrow{ \sf{8 + 12j}}[/tex]

Hope I helped!

Best regards! :D

Answer:

There Is No Value For The Digit 0

Step-by-step explanation:

devide 2/3 to 1/4 to get theanwser

Step-by-step explanation:

Answer: $4.75.

Step-by-step explanation:

It is given that a news offers a subscription that costs $28.50 for 6 months.

We need to find the unit price per month.

The formula for unit price per month is

[tex]\text{Unit price per month}=\dfrac{\text{Total subscription cost}}{\text{Number of months}}[/tex]

[tex]\text{Unit price per month}=\dfrac{28.50}{6}[/tex]

[tex]\text{Unit price per month}=\dfrac{285}{60}[/tex]

[tex]\text{Unit price per month}=4.75[/tex]

Therefore, the unit price per month is $4.75.

x = one number

x + 1 = second number

x + x + 1 = 129

Combine like terms

2x + 1 = 129

Subtract 1 from both sides.

2x = 128

Divide both sides by 2

x = 64

The locker numbers are 64 and 65