Mary bought two doughnuts and a carton of milk for $2.87. The carton of milk was $1.29. How much is one doughnut?
equation

Answer:

Step-by-step explanation:

x      - some integer

2x+1      - an odd integer (the smaller one)

2x+1+2=2x+3       - the next odd integer consecutive to 2x+1  (the larger)

2×(2x+1)       - twice the smaller number

2x+3+2•(2x+1)     -the sum of the larger number and twice the smaller number

4•(2x+1)      - four times the smaller number

4•(2x+1)-27     - 27 less then four times the smaller number

2x + 3 + 2•(2x + 1) = 4•(2x + 1) - 27

2x + 3 + 4x + 2 = 8x + 4 - 27

            6x + 5  =  8x - 23

                  -5            -5

              6x  =  8x - 28

             -8x       -8x

            -2x  =  - 28

          ÷(-2)      ÷(-2)

              x  = 14

2x+1 = 2•14 + 1 = 29

2x+3 = 2•14 + 3 = 31

Check:  31+2•29=31+58=89;  4•29-27=116-27=89

Answer:

how many girls do you have

Answer:

5x-15+90+2x=7x+75

Step-by-step explanation:

you just want to add together the like terms which gives you 7x+75 like terms are just numbers that are similar such as 5x and 2x, or -15 and 90.

Answer: r=3

Step-by-step explanation:

4r-5=1-2r

-2r -2r

2r-5=1

+5 +5

2r=6

/2 /2

r=3

Answer:

A.

Step-by-step explanation:

Use the pythagoreon theory

4^2+10^2=16^2

116=256

5^2+12^2=13^2

169=169

7^2+24^2=25^2

625=625

8^2+15^2=17^2

289=289

Hope this helps! :)

Answer:

d b c

Step-by-step explanation:

fdfbwhgbcsjbcjbchsvbchwgchwvcdn

Answer:

45 degrees or choice D

Step-by-step explanation:

angles of a triangle will always amount to 180 when added

60+75+x=180

135+x=180

x=45

Answer:

45

Step-by-step explanation:

Triangle sum theorem states that all interior angles of a triangle = 180

Therefore, 60 + 75 + x = 180

Answer:

10ft

Step-by-step explanation:

The bottom length is 16 and the top length is 6, so you would do 16-6 to get the missing value.

Answer:

12

Step-by-step explanation:

126÷10.5=12

i hope this helps :D

Step-by-step explanation:

T1=a

T2=ar

r=T2÷T1

r=--18÷6

r=-3

T11=ar^10

T11=6×-3^10

T11=-354294

Answer:

354294

Step-by-step explanation:

a11=6*(-3)10=354294

Answer:

Step-by-step explanation:

let sale be x

and his salary be y

y=300+0.4x----------1 the old equation

y=450+0.2x----------2 the new equation

for his salary to be the same

equation 1 and 2 must be equal hence

300+0.4x=450+0.2x

solving for x we have

300-450+0.4x-0.2x=0

-150+0.2x=0

0.2x=150

x=150/0.2

x=$750

Answer:21

Step-by-step explanation:i did the math

y+3 = 5(x+5)

y+3 = 5x+25 ... distribute

y = 5x+25-3 ... subtract 3 from both sides

y = 5x+22

y-5x = 22 ... subtract 5x from both sides

-5x+y = 22 .... is one possible answer

5x-y = -22 ... is another possible answer

The difference is that I multiplied both sides by -1 so that the A term becomes positive.

The equation of the line, in point-slope form, is: A. y - 1 = -2(x - 4).

Where, a and b are coordinates of a point on a line, and m is the slope, the equation of the line in point-slope form can be written as, y - b = m(x - a).

Given:

Therefore, substitute (a, b) = (4, 1) and m = -2 into y - b = m(x - a).

Thus:

y - 1 = -2(x - 4)

Therefore, the equation of the line, in point-slope form, is: A. y - 1 = -2(x - 4).

Learn more about the point-slope form on:

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Answer:

Francisco will add 10 drops of food coloring to 5 cups of white frosting and get the orange frosting

Step-by-step explanation:

4 drops of food coloring to 2 cups of white frosting and get the orange frosting.

He has 5 cups of white frosting. He doesn't know how many drops of orange food coloring to add

Let x = drops of food coloring he will add

Drops of food coloring : cups of white frosting

4 : 2 = x : 5

4 / 2 = x / 5

Cross multiplication

4 * 5 = 2 * x

20 = 2x

Divide both sides by 2

x = 20 / 2

= 10

x = 10 drops of food coloring

Therefore, Francisco will add 10 drops of food coloring to 5 cups of white frosting and get the orange frosting

The relationship between the rise of the chair with respect to time is required.

The ski lift chair rises [tex]3.5\ \text{feet/s}[/tex]

Every [tex]4[/tex] seconds a ski lift chair rises [tex]14\ \text{feet}[/tex].

[tex]4\ \text{seconds}=14\ \text{feet}[/tex]

Divide by [tex]4[/tex] on both sides

[tex]1\ \text{second}=\dfrac{14}{4}=3.5\ \text{feet}[/tex]

The rate of the height increase of the ski lift chair is [tex]3.5\ \text{feet/s}[/tex]

Learn more about rate of change:

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Answer:

7

Step-by-step explanation:

-2 x _ = -14

2(7)=14

(-)x(-) = +

-2(7)=-14

Answer:

C. arm span, foot length is predicted to increase by about 0.186 cm.

Step-by-step explanation:

edgen 2022

C) arm span and foot length are predicted to increase by about 0.186 cm.

Linear regression analysis is used to predict the value of a variable based on the value of another variable. The variable you want to predict is called the dependent variable. The variable you are using to predict the other variable's value is called the independent variable.

Given, The arm span and foot length were measured (in centimeters) for each of the 19 students in a statistics class and displayed in the scatterplot.

let "FL" be the foot length and "AS" be the Arm span.

Slope = Δy/Δx = ΔFL/ΔAS

ΔFL/ΔAS = 0.186

ΔFL = ΔAS* 0.186

thus an increase in AS by 1 cm will lead to an increase in FL by 0.186cm

Therefore,  the slope of the least-squares regression line means for each additional centimeter C) arm span, foot length is predicted to increase by about 0.186 cm.

Learn more about linear regression here:

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Answer:

5/8

Step-by-step explanation:

I believe this should be fraction addition (?)

3/8 + 1/4

8, 4: 8 = 3/8 + 2/8

= 3 + 2/8 = 5/8

You have a total of (5/8)th part of a complete pizza.

Given is that you have 3/8 of a pizza in one box and 1/4 in another box.

Assume that the total pizza you have is denoted by [x].

[x] = (3/8 + 1/4) of a pizza

[x] = (3 + 2)/8 of a pizza

[x] = 5/8 of a pizza

Therefore, you have a total of (5/8)th part of a complete pizza.

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Answer:

M=-1/4

Step-by-step explanation:

Use the slope intercept form y=mx+b to find the slope m.

Answer:

The slope of the equation: y=-1/4x+7 is -1/4

The slope of the equation: y=-3x+5 is -3

Step-by-step explanation:

It is easier to think of the slope at the number behind the x variable. But algebraically, y=mx+b is the formula and the number that is in the value of m is the slope of the linear function.

Answer:

209km

Step-by-step explanation:

3hr 48min=228min

228÷12=19

11×19=209km

Answer:

It would be -89/100

That is the lowest form and can not be reduced

Answer:

- 89/100

Step-by-step explanation:

You can't simplify it, so it'd remain over 100 !

Answer:

8.8412 x 5 = 44.206

11.0515 x 4 = 44.206

Step-by-step explanation:

division

To find two more multiplications with an answer of 44.206, let's use the following equation:

1) [tex]2.1 x 21.05 = 44.2055[/tex]In this calculation, if we multiply

2.1 by 21.05, we get an answer of 44.2055, which is very close to 44.206. 2) [tex]4.020 x 11.001 = 44.22602[/tex]By multiplying 4.020 by 11.001, we obtain a product of 44.22602, which is also close to the desired answer of 44.206. In conclusion,

we have provided two additional multiplications that have answers very close to 44.206. The first multiplication of[tex]2.1 x 21.05[/tex]  yields 44.2055, while the second multiplication of esults in 44.22602. Although the exact solution of 44.206 was not achieved, both calculations provide results within a very small margin of deviation.

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Answer:

1.6 or 8/5

Step-by-step explanation:

Answer: Polyhedron

Step-by-step explanation: A polyhedron is a shape, with 2 parts. Face and Edge, they can only be connected with a edge or a vertex. Only 5 regular polyhedrons exist; tetrahedron ~ 4 faced 'the cube' ~ 6 faced the octahedron ~ 8 faced ~ the dodecahedron ~ 12 faced, and the icosahedron ~ 20 faced.

Answer:

a = 3.09 m/s^2

Step-by-step explanation:

v^2 = Vo^2 +2ax

v= final velocity

Vo = initial velocity

a = acceleration

x = distance

(-10.9)^2 = (-27.7)^2 + 2(a)(-105)

118.81 = 767.29 - 210a

-210a = -648.48

a = 3.09 m/s^2

[tex]( {v})^{2} - ({v(0)} \: )^{2} = 2 \times a \times ∆x[/tex]

[tex]( { - 10.9})^{2} - ({ - 27.7})^{2} = 2 \times a \times - 105 \\ [/tex]

[tex]118.81 - 767.29 = - 210 \times a[/tex]

[tex] - 648.48 = - 210 \times a[/tex]

Negatives simplified :

[tex]648.48 = 210 \times a[/tex]

Divided both sides by 210 :

[tex]a = \frac{648.48}{210} \\ [/tex]

[tex]a = 3.088 \: \: \frac{m}{ {s}^{2} } \\ [/tex]

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I think it's the correct answer.

Hope helped.

And we're done.

Thanks for watching buddy good luck.

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Answer:

Hope this helps, I am sure they are correct!