MaryAnne has 5 albums of postcards in her postcard collection. Each album contains 240 postcards. Which of the following represents the number of postcards in her collection?

Answer:

2nd option: [tex]3 \frac{65}{72} [/tex] pounds

Step-by-step explanation:

backpack +math book ----- [tex]18 \frac{7}{9} [/tex] pounds

backpack ----- [tex]14 \frac{7}{8} [/tex] pounds

Weight of math book

= (weight of backpack +math book) -(weight of math book)

[tex] = 18 \frac{7}{9} - 14 \frac{7}{8} \\ = 3 \frac{65}{72} [/tex]

Answer:

B. 3 and StartFraction 65 over 72 EndFraction pounds

Step-by-step explanation:

Answer: 21

Step-by-step explanation:

24 times 16 equals 384

21 times 90 equals 1890

Answer:

$3

Step-by-step explanation:

Plug in 2 for y, so you get 2x + 3(2) = 12, and that simplified would be

2x + 6 = 12. Next, subtract 6 from both sides, so you get 2x = 6. Divide 2 by both sides to get 3!

Answer:

Step-by-step explanation:

1. M is the midpoint of CD; CM = 3x - 10; MD = 6x - 22;        GIVEN

2.  CM = MD                                                                       Definition of Midpoint

3.  3x - 10 = 6x - 22                                                            Substitution Property

4.  -3x - 10 = - 22                                                      Subtraction Prop of Equality

5.  -3x =-12                                                               Addition Prop of Equality

6.  x = 4                                                                    Division Prop of Equality

The missing reasons in the two-column proof are:

1. Given

2. Definition of a midpoint

3. Addition property of equality

To apply the addition property of equality, both sides of an equation is added with equal quantity to make it balanced.

In the two-column proof given, the missing reasons are:

1. Given (the information was stated already)

2. Definition of a midpoint (CM = MD)

3. Addition property of equality (10 was added to both sides of the equation).

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Step 6 contains an error. Option C is correct

Trigonometry deals with the relationship between the sides and angles of a right-angle triangle.

The incorrect step is;

[tex]\rm 1 + cos \theta = 2 sin^2\frac{\theta}{2}[/tex]

The correct step is;

[tex]\rm 1 - cos \theta = 2 sin^2\frac{\theta}{2}[/tex]

Because when you multiply the whole equation the cosΘ will be negative and in the given solution it is positive. Step 6 contains an error.

Hence, option C is correct

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Answer:

1

Step-by-step explanation:

use division.

281 divided by 8

which is in all 35, but there is a remainder

and that remainder is 1

so one person will be on that last boat

Answer:

$27.09 in all

Step-by-step explanation:

$1.29 × 16.5 = $21.285

$1.29 × 4.5 = $5.805

$21.285 + $5.805 = $27.09

Answer:

x = 1 , y = 2

Step-by-step explanation:

Solve for substitution

J times the product of 4 and 7:

J(4x7)

Answer:

28j

Step-by-step explanation:

4 times 7=28

28 times j= 28j

Answer:

[tex]y=-\frac{7}{2}x+8[/tex]

Step-by-step explanation:

Given the equation

[tex]y\:=\:\frac{2}{7}x+9[/tex]

comparing the equation with the slope-intercept form

[tex]y =mx+b[/tex]            

Here,

so the slope of the line is 2/7

As we know that the slope of the perpendicular line is basically the negative reciprocal of the slope of the line, so

the slope of the perpendicular line will be: -7/2

Therefore, the point-slope form of the equation of the perpendicular line that goes through (4,-6) is:

[tex]y-y_1=m\left(x-x_1\right)[/tex]

[tex]y-\left(-6\right)=\frac{-7}{2}\left(x-4\right)[/tex]

[tex]y+6=\frac{-7}{2}\left(x-4\right)[/tex]

[tex]y+6-6=\frac{-7}{2}\left(x-4\right)-6[/tex]

[tex]y=-\frac{7}{2}x+8[/tex]

Answer:

x = [tex]\frac{2b+3}{5b-2}[/tex]

Step-by-step explanation:

Given

x(5b - 2) = 2b + 3 ← isolate x by dividing both sides by (5b - 2)

x = [tex]\frac{2b+3}{5b-2}[/tex]

Answer:

A equals 6

Step-by-step explanation:

6x3=18

Answer:

i think answer is

a=18/3=6

Answer:

4. 3

Step-by-step explanation:

If you multiply 2 by 3 it'll equal to 6. Same with 7 x 3= 21.

You could also subtract 7 from 2 equalling 5 and 21 - 6 equal to 15. Then you would but y over x giving you 15/5. 15 divided by 5 is 3. So both ways you get 3.

Hope that helps :)

Answer:

g

Step-by-step explanation:

Answer:

B 9 pounds of barbecue for $82.26

Step-by-step explanation:

$28.74/3 lb = $9.58/lb

A $57.48/6 lb = $9.58/lb

B $82.26/9 lb = $9.14/lb

C $114.96/12 lb = $9.58/lb

D $143.70/15 lb = =$9.58/lb

Answer: B 9 pounds of barbecue for $82.26

Answer:

Let's define:

X = number of pounds of the brand 1 (price = $2.50 per pound)

Y = number of pounds of the brand 2 (price = $2.80 per pound)

We want to make a mix of 480 pounds, then:

X + Y = 480.

And we want the mean price to be $2.68, then:

(X*$2.50 + Y*$2.80)/480 = $2.68

Then we have a system of equations:

X + Y = 480

(X*$2.50 + Y*$2.80)/480 = $2.68

To solve this, the first step will be to isolate one variable in one of the equations, and then replace this in the other equation.

Let's isolate X in the first eq.

X = 480 - Y.

Now we can replace this in the other equation and get:

((480 - Y)*$2.50 + Y*$2.80)/480 = $2.68

Now let's solve this for Y.

((480 - Y)*$2.50 + Y*$2.80) = $2.68*480 = $1,286.40

$1,200 + Y*$0.30 = $1,286.40

y*$0.30 =  $1,286.40 - $1,200 = $86.40

Y = $86.40/$0.30 = 288

Then:

X = 480 - Y = 480 - 288 = 192

Then the manager must use 192 pounds of the brand that costs $2.50 per pound, and 288 pounds of the brand that costs $2.80 per pound.

Answer: synthesis

polymerization

oxidation

Step-by-step explanation:

Answer: synthesis

polymerization

oxidation

Answer:

The first option.

Step-by-step explanation:

5*6=30 and 9*6=54. We're just multiplying what we had originally by 6, meaning we'll have the same shade, but in a bigger quantity.

Answer:

11/20 is the answer

Answer:

Concert Specialties is the better buy

Step-by-step explanation:

In order to determine which of the two deals is the better buy, we first need to find out how many of each pack we would need to get the needed 12 tickets. Once we have this value we multiply it by the dollar amount of each pack and compare the totals like so...

Concert Specialties => pack of 3 * 4 = 12 tickets => 4 * 75 = $300

We 'R' Entertainment => pack of 4 * 3 = 12 tickets => 3 * 108 = $324

Therefore, we can now see that the Concert Specialties is the better buy since you are getting the 12 tickets for $24 less than We 'R' Entertainment

Answer:

Answer: A- 1.50$ for (1 lb) make sure you pick the graph with the coat that go to 7 not 12!

Step-by-step explanation:

but maybe its 1.25

Answer:

1.25

Step-by-step explanation:

[tex]\huge\underline{\frak{ \: \: \: \: \: \: Solution : \: \: \: \: \: \: }} \\ \\ [/tex]

[tex]\frak {\pink{Let}}\begin{cases} \sf{\red{Breadth \: be \: x}}\\ \sf{\orange{The \: Length = x + 9}}\end{cases} \\ [/tex]

[tex]\bigstar \: \underline{\textsf{According to the given Question :} }\\ \\[/tex]

[tex]:\implies \sf Area = Length \times Breadth \\ \\ \\ [/tex]

[tex]:\implies \sf 360=(x + 9 ) x \\ \\ \\ [/tex]

[tex]:\implies \sf 360= {x}^{2} + 9x \\ \\ \\ [/tex]

[tex]:\implies \sf {x}^{2} + 9x - 360 = 0\\ \\ \\ [/tex]

[tex]:\implies \sf {x}^{2} + 24x - 15x - 360 = 0\\ \\ \\ [/tex]

[tex]:\implies \sf x(x + 24) - 15(x + 24) = 0\\ \\ \\ [/tex]

[tex]:\implies \sf (x + 24) \: (x - 15) = 0\\ \\ \\ [/tex]

[tex]:\implies \underline{ \boxed{ \sf x = - 24 \: or \: x = 15}}\\ \\ \\ [/tex]

[tex]\therefore\:\underline{\textsf{Ignoring the negative value, the Breadth of rectangular garden is \textbf{15 ft}}}. \\ \\ \\ [/tex]

[tex]\bigstar \: \underline{\textsf{Dimensions of rectangular garden :}} \\ \\ [/tex]

[tex]\bullet\:\:\textsf{The Breadth of rectangular garden = x = \textbf{15 ft.}} \\ \\ [/tex]

[tex]\bullet\:\:\textsf{The Length of rectangular garden = x + 9 = 15 + 9 = \textbf{24 ft.}} \\ \\ [/tex]

Answer:

5(x-3)

Step-by-step explanation:

The word "SUM" means the answer to an "ADDITION".

"SUM" is always used with the word "AND" to indicate which numbers are being added.

The SUM of a number AND -3 is written as:  

( x + ( − 3 ) ), or  ( x -3 )

(where we have chosen the number to be  x .)

But we want FIVE of those sums; this means:

5  ( x − 3 )

Answer:

B: Y=1/2×+2 I think that's it

The division is one of the four fundamental arithmetic operations. The time it will take both of them together to paint the house is 6.857 hours.

The division is one of the four fundamental arithmetic operations, which tells us how the numbers are combined to form a new one.

Let the area that is needed to be painted be x.

Given that Walter can paint the house by himself in 12 hours. Therefore, we can write the rate at which Water paint is,

Rate = Area needed to be painted / Time

       = x / 12 hours

       = x/12

Further, given that Helen can paint the house by herself in 16 hours. Therefore, we can write the rate at which Helen paint is,

Rate = Area needed to be painted / Time

       = x / 16 hours

       = x/16

Now, the rate at which they both will paint or the area that they will cover in an hour is,

Rate = (x/12) + (x/16)

       = (4x/48) + (3x/48)

       = (4x + 3x)/48

       = 7x / 48

Furthermore, the time it will take both of them together to paint the house is,

Time = Area needed to be painted / Rate

        = x / (7x/48)

        = 48/7 hours

        = 6.857 hours

Hence, the time it will take both of them together to paint the house is 6.857 hours.

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Answer:

7.5 gallons

Step-by-step explanation:

divide 12 by 3 to get oz per minute. 4

do 60 × 4 to get total minutes 240

4×240=960

put 960 oz into gallons and get 7.5