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Wewaii [24]
3 years ago
15

A local bookstore finds that each day approximately 20% of their sales are nonfiction books if they sell 425 books one day how m

any of those books are nonfiction?
Mathematics
1 answer:
VikaD [51]3 years ago
6 0
Steps:
1. Do a proportion
X/425= 20/100
2. Do 425 times 20 which equals 8,500
3. Do 8,500 divided by 100 which equals 85
4. Your answer is: 85
You might be interested in
Solve the following differential equations or initial value problems. In part (a), leave your answer in implicit form. For parts
shepuryov [24]

Answer:

(a) (y^5)/5 + y^4 = (t^3)/3 + 7t + C

(b) y = arctan(t(lnt - 1) + C)

(c) y = -1/ln|0.09(t + 1)²/t|

Step-by-step explanation:

(a) dy/dt = (t^2 + 7)/(y^4 - 4y^3)

Separate the variables

(y^4 - 4y^3)dy = (t^2 + 7)dt

Integrate both sides

(y^5)/5 + y^4 = (t^3)/3 + 7t + C

(b) dy/dt = (cos²y)lnt

Separate the variables

dy/cos²y = lnt dt

Integrate both sides

tany = t(lnt - 1) + C

y = arctan(t(lnt - 1) + C)

(c) (t² + t) dy/dt + y² = ty², y(1) = -1

(t² + t) dy/dt = ty² - y²

(t² + t) dy/dt = y²(t - 1)

(t² + t)/(t - 1)dy/dt = y²

Separating the variables

(t - 1)dt/(t² + t) = dy/y²

tdt/(t² + t) - dt/(t² + t) = dy/y²

dt/(t + 1) - dt/(t(t + 1)) = dy/y²

dt/(t + 1) - dt/t + dt/(t + 1) = dy/y²

Integrate both sides

ln(t + 1) - lnt + ln(t + 1) + lnC = -1/y

2ln(t + 1) - lnt + lnC = -1/y

ln|C(t + 1)²/t| = -1/y

y = -1/ln|C(t + 1)²/t|

Apply y(1) = -1

-1 = ln|C(1 + 1)²/1|

-1 = ln(4C)

4C = e^(-1)

C = (1/4)e^(-1) ≈ 0.09

y = -1/ln|0.09(t + 1)²/t|

8 0
3 years ago
I’ll give BRAINLIEST to best answer, please answer fast.
Basile [38]

2 waffles =3$

2x4=8 waffles (How many waffles Sage wants)

3 + 3 + 3 + 3= 12  (or 3x4)

(2) (4) (6) (8)

<u>12$ at I Scream</u>

4 waffles= 4$

4 waffles x2=8$

<u>8$ at Scoopz</u>

12-8= 4

<h3>Sage would save 4 dollars if she got 8 waffles at Scoopz.</h3>

3 0
2 years ago
Solve for X<br><br> -3 (2x + 6) = 12<br><br> pls help <br> im ready to got bed<br> lol
kramer

Answer:

x=-5 Hope this helped! Goodnight!

Step-by-step explanation:

Let's solve your equation step-by-step.

−3(2x+6)=12

Step 1: Simplify both sides of the equation.

−3(2x+6)=12

(−3)(2x)+(−3)(6)=12(Distribute)

−6x+−18=12

−6x−18=12

Step 2: Add 18 to both sides.

−6x−18+18=12+18

−6x=30

Step 3: Divide both sides by -6.

−6x /−6 = 30 /−6

x=-5

6 0
3 years ago
Read 2 more answers
PLEASE CAN SOMEBODY HELP PLEASE I AM BEGGING YOU PLEASE
rusak2 [61]
(3,-1)? i believe that's what it would be
5 0
3 years ago
Read 2 more answers
Find the equation of a line given the point and slope below.
Levart [38]

Step-by-step explanation:

\frac{y - 6}{x - 3}  =  - 3

- 3(x - 3) = y - 6

- 3x + 9 = y - 6

y =  - 3x + 9  + 6 =  - 3x + 15

Option C

4 0
3 years ago
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