Last year the price of a college book was $32. This year the price of the book has increased. The college book's new price is $40. What is the percent increase in the price of the book? (answer must include %)

Answer:

140.22

Step-by-step explanation:

Answer:

z = 28

Step-by-step explanation:

Let's try this first:

6 = something - 1

Something = 7

Next:

We know that "something" is 1/4z

1/4z = 7

Divide both sides by 1/4 to isolate z

z = 28

Hope this helps :)

Have an awesome day!!

Z=28

first, add one to each side to eliminate the negative one. you'll get:

first, add one to each side to eliminate the negative one. you'll get:7= z

first, add one to each side to eliminate the negative one. you'll get:7= znow, to get rid of the 1/4, multiply both sides by 4.

first, add one to each side to eliminate the negative one. you'll get:7= znow, to get rid of the 1/4, multiply both sides by 4.(7x4)=(1/4z)4

first, add one to each side to eliminate the negative one. you'll get:7= znow, to get rid of the 1/4, multiply both sides by 4.(7x4)=(1/4z)4simplify to get 28=z.

Answer:

Plato answer is 13863

Step-by-step explanation:

Plato answer is 13863

Step-by-step explanation:

hope this helps! good luck!

Answer:

[tex]\frac{-6-(-2)}{9-3} \\-\frac{2}{3} or -0.67[/tex]

Step-by-step explanation:

The formula for finding the slope of a line is [tex]\frac{y_{1}-y_{2} }{x_{1}-x_{2}} \\[/tex]

Assign a number to each equation say (9, -6) is Equation 1 and (3, -2) is Equation 2.

Substitute the values into the equation.

Solve.

Have a nice day.

Answer:

Step-by-step Solution:

Hence, the simplified result is -6y + 4.

Answer:

2(3x+5)-3 = 6x+7

6/2(1+2) = 9

Step-by-step explanation:

whenever we run a perpendicular line to a base from a right-angle in a right-triangle, like in this case, we end up with 3 similar triangles, a Small one, a Medium and a containing Large one, therefore Check the picture below.

Answer:

the reciprocal of 4 I'd 1/4 and 4/7 is 7/4

Answer:

[tex]\frac{7}{32}[/tex]

Step-by-step explanation:

The reciprocal of a number n is [tex]\frac{1}{n}[/tex]

4 [tex]\frac{4}{7}[/tex] ( change to an improper fraction )

= [tex]\frac{32}{7}[/tex]

Then reciprocal is [tex]\frac{1}{\frac{32}{7} }[/tex] = [tex]\frac{7}{32}[/tex]

Answer:

Step-by-step explanation:

We can observe general terms of n:

Rewrite it as:

We need to find the least n for which aₙ > 500:

If n = 10:

If n = 11:

So the least n is 11

If I'm understanding the construction of this sequence correctly, we have

• a₁ = 0

(the sum is empty since there is no positive integer b such that b•1 + b = 1)

• a₂ = 3

(since 3 = 1•2 + 1)

• a₃ = 4 + 8 = 12

(since 4 = 1•3 + 1 and 8 = 2•3 + 2)

• a₄ = 5 + 10 + 15 = 30

(since 5 = 1•4 + 1, 10 = 2•4 + 2, and 15 = 3•4 + 3)

and so on.

Notice that for n ≥ 2, aₙ is simply the sum of the first n - 1 multiples of n + 1. So

[tex]\displaystyle a_n = \sum_{i = 1}^{n - 1} (n+1)i[/tex]

Recall that

[tex]\displaystyle \sum_{i=1}^n i = \frac{n(n+1)}2[/tex]

Then

[tex]\displaystyle a_n = (n+1) \sum_{i=1}^{n-1} i = (n+1) \cdot \frac{(n-1)n}2 = \frac{n(n^2-1)}2[/tex]

Solve for n such that aₙ > 500 :

n (n² - 1)/2 > 500

n (n² - 1) > 1000

n³ - n > 1000

We can solve this by inspection. Noticing that 10³ = 1000, if we replace n = 10 we get

10³ - 10 = 990 > 1000

which is false, but the difference is quite small. So we move up to n = 11 and find

11³ - 11 = 1320 > 1000

which is true, so n = 11 is the least number such that aₙ > 500.

Answer:

Step-by-step explanation:

Let,5:13=3:x

Now we have,

5/13=3/x

5x=13×3

x=39/5

x=7.8

Step-by-step explanation:

5/13=3/x5 x =13 × 3 x =39/5 x =7.8

Answer:

$27.00x.15=4.05

27.00+4.05=$31.05

$31.05/3= 10.35

Each person will pay $10.35

Answer:

C

Step-by-step explanation:

Pyramids and Sphinx are Egypt

Aqueducts and Colosseim and Rome

Taj Mahal and Panama Canal aren't even in the same location

China is well known for its Great Wall so its C

Answer:

63,967

Step-by-step explanation:

Answer:

63,967

Step-by-step explanation:

did the math it took kinda long

Answer: x > 14

Step-by-step explanation: At least means that the minimum is 14. This means x, her age would have to be greater than 14.

Answer:

the first is is a nonlinear

Step-by-step explanation:

the first graph is nonlinear

Answer:

For a 100m run record he has an average speed of 10.44 miles per second.

For a 200m run record he has an average speed of 10.42 miles per second.

Answer:

20,655 I think

Step-by-step explanation:

9*17*145 = 20,655

Answer:

The first two are parallel and the last one is not parallel

Step-by-step explanation:

TO find out whether LN is parallel to XY, we must check to see if the ratio from LX to XM is the same as the ratio from NY to YM

First one:

LX:XM is equal to 2:7

NY: YM is equal to 4:14

Since NY to YM is exactly double of LX to XM, the lines are parallel

Second one:

LX:XM is equal to 2:6

NY:YM is equal to 3:9

Since both of them have similar ratios,

or both can be divided by 1:3, the lines are parallel.

(2:6= 1:3 x 2) (3:9= 1:3 x 3)

Third one:

LX:XM is equal to 2:3

NY:YM is equal to 4:7

Neither of them have a similar ratio or a common factor, so the lines are not parallel

Answer:

none

Step-by-step explanation:

not sure but the answer is 40 cause 12-7=5 10x3=30 and 3+2=5 and 5+30+5=40

Answer:

[tex](12 - 7) + (10 \times 3) + (3 + 2) \\ \\ = 5 + 30 + 5 \\ \\ = 40 \: is \: none[/tex]

# keep learning#

# Bora 7 #

# £

Answer:

y = -7x - 2

Step-by-step explanation:

To write this into an equation, we need to use the y = mx + b formula.

y = mx + b

-30 = -7(4) + b  <--- Substitute 4 as x, and -30 as y.

-30 = -28 + b  

+ 28    +28  <--- Add 28 on both sides of the equation.

-2 = b

Final equation:

y = -7x - 2

Answer:

Step-by-step explanation:

using the formula: y - y1 = m ( x - x1 )

                            : y - -30 = -7 ( x - 4 )

                            : y + 30 = -7x + 28

                            : y = -7x + 28 - 30

                             : y = -7x - 2

Answer:

y = -3x - 1

Use the methods on your other questions.

Answer:

A=π [units²].

Step-by-step explanation:

for more details see the attachments (one is the required graph, another is calculation of the required area).

20₃ - 11₃ = 20₃ - 10₃ - 1₃

… = 10₃ - 1₃

… = 2₃

Put another way, we "borrow a 1" from the 3¹ digits place:

20₃ = 1(3)₃ - 11₃ = 2₃

But this is just the number 2 (in base 10), which in base 2 would be 10₂.

Answer:

  x = 1

Step-by-step explanation:

f(x) = g(x) where the graphs cross, at x = 1.

Answer:

D.) 19 would be your answer!!

Hope this helps! :)

We know that:

Solution:

Hence, the value of b to make this equation equivalent is 9.58

Answer:

18/5 miles

Step-by-step explanation:

let d be the mountain dist path

upward biking

x miles - 1 hr

d 45 mins

3x/4 = d

riding down

x+3 - 60 min

d. - 20

(1/3)(x+3) = d

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

4x+12 = 9x

x = 12/5

d =( 12*3)/(4*5)= 9/5

upward+downward = 2*(9/5) = 18/5