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cluponka [151]
2 years ago
8

Plz help me ( no link plz) if you answer right i will make brainly and 15 points

Mathematics
1 answer:
lukranit [14]2 years ago
3 0

Answer:

7.5

Step-by-step explanation:

let x be the ticket and y the popcorn

x+y=15

x+3y=30

solve for x and y using simultaneous equations

x=7.5

y=7.5

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22.5x−4.6=3.5 Solve correctly
Colt1911 [192]

Answer:

x = 0.36

Step-by-step explanation:

22.5x − 4.6 = 3.5

first, add the -4.6 over

22.5x = 8.1

then, divide 8.1 by 22.5

x = 0.36

best of luck!

8 0
3 years ago
The publisher of a recently released nonfiction book expects that over the first 20 months after its release, the monthly profit
wolverine [178]

Answer:

(a)\frac{dP}{dt}=\frac{4800-1600t-240t^2}{(t^2+20)^2}

(b)P'(5)=-($4.54) Thousand

(c)P'(11)=-($2.10) Thousand

(d)The fifth Month

Step-by-step explanation:

Given the monthly profit model:

P(t)=\frac{240t-40t^2}{t^2+20}

(a)We want to derive a model that gives the Marginal Profit, P' of the book.

We differentiate

P(t)=\frac{240t-40t^2}{t^2+20} using quotient rule.

\frac{dP}{dt}=\frac{(t^2+20)(240-80t)-(240t-40t^2)(2t)}{(t^2+20)^2}

Simplifying

\frac{dP}{dt}=\frac{4800-1600t-240t^2}{(t^2+20)^2}

We have derived a model for the marginal profit.

(b) After 5 months, at t=5

Marginal Profit=P'(5)

\frac{dP}{dt}=\frac{4800-1600t-240t^2}{(t^2+20)^2}

P^{'}(5)=\frac{4800-1600(5)-240(5)^2}{(5^2+20)^2}

=-($4.54) Thousand of dollars

(c)Marginal Profit 11 Months after book release

P^{'}(11)=\frac{4800-1600(11)-240(11)^2}{(11^2+20)^2}

=-($2.10) Thousand of dollars

(d) Since the marginal profit at t=5 is negative, after the 5th Month, the profit starts to experience a steady decrease.

6 0
3 years ago
The label on Lulu’s new roll of tape shows that the roll has 7 meters of tape.
Anton [14]

Answer:

4 meters

Step-by-step explanation:

7-3=4 m

8 0
3 years ago
Read 2 more answers
85 points!! | All of the following expressions have the same value, when x= -2 and y= 4, except
slavikrds [6]

Answer:

They have two sets of equal answers...

Step-by-step explanation:

-2 * 2 * 4 = -16

0 - 4 * -2 * -2 = -16

0 * -2 * -2 * 4 = 0

0 * 4 * 4 = 0

4 0
3 years ago
9) Round 9.053 to the nearest tenth.
Margarita [4]

Step-by-step explanation:

9.1

....................

3 0
3 years ago
Read 2 more answers
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