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AfilCa [17]
3 years ago
6

Lin went 7/15 of a mile in 1/15 of an hour on her hoverboard. What was her speed on the hoverboard?

Mathematics
1 answer:
amm18123 years ago
3 0
7 miles!! I took the test so it could help
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Your school plans to buy hamburgers for the school fun day. it will cost $270 for each student to have a hamburger. each hamburg
AVprozaik [17]

Using the inequality, the school will need $ 146 in order for each student to have a hamburger

If this is the inequality:

124 + x ≥ 270

1) deduct 124 from both sides

124 + x - 124 ≥ 270 - 124

x ≥ 146

x can be 146 and below because the inequality sign states x is less than or equal to 146.

The school needs an additional maximum amount of 146 in order for each student to have a hamburger.

<h3>What is inequality?</h3>
  • An inequality in mathematics is a relation that compares two numbers or other mathematical expressions in an unequal way.
  • The majority of the time, size comparisons between two numbers on the number line are made. Different types of inequalities are represented by a variety of notations, including:
  • The symbol a < b indicates that a is smaller than b.
  • When a > b is used, it indicates that a is bigger than b.
  • A is not equivalent to b in any scenario. These relationships are referred to be stringent inequalities since either an or b is strictly bigger or less than the other. Equivalence is not considered.

To learn more about inequality with the given link

brainly.com/question/20383699

#SPJ4

8 0
2 years ago
The revenue (X) from the sales of a compay has an expected value of $6,263, with a standard deviation of $440 while the cost (Y)
shutvik [7]

Answer:

the covariance between the revenue and cost is 1,513. What is the variance of the profit (X-Y) of the company is 303468

Step-by-step explanation:

Given that;

E(x) = 6263

SD(x) = 440

F(y) = 4872

SD(y) = 336

COVI (x, y) = 1513

Variance x = [ SD(x) ]²

Variance x = [440]² = 193600

Variance y = [ SD(y) ]²

Variance y = [336]² = 112896

Now to get variance of the profit (X-Y) of the company we say;

variance ( x-y ) = variance x + variance y - 2covi(x.y)

we substitute

variance ( x-y ) = 193600 + 112896 - ( 2 × 1513 )

variance ( x-y ) = 306496 - 3026

variance ( x-y ) = 303468

therefore the covariance between the revenue and cost is 1,513. What is the variance of the profit (X-Y) of the company is 303468

7 0
3 years ago
Select all expressions that are equivalent to 16x-12-24x+4. <br><br> pls help ASAP!
AleksandrR [38]
-8x - 8.
16x - 24 x = -8x
-12 + 4 = 8
8 0
3 years ago
The total cost (in dollars) of producing x food processors is C(x) = 2500 + 50x -0.28.
Darya [45]

Answer:

The exact cost of producing the 21st food processor is $38.52.

The marginal cost to approximate the cost of producing the 21st food processor is $38.24

Step-by-step explanation:

Consider the provided function.

C(x) = 2500 + 50x -0.28x^2

(A) Find the exact cost of producing the 21st food processor

The exact cost producing 21st food processor is C(21)-C(20)

Substitute x=21 in above function.

C(x) = 2500 + 50(21) -0.28(21)^2

C(x) = 2500 +1050 -123.48

C(x) = 3426.52

Substitute x=20 in above function.

C(x) = 2500 + 50(20) -0.28(20)^2

C(x) = 2500 +1000-112

C(x) = 3388

The exact cost producing is:

C(21)-C(20)=3426.52-3388=38.52

Hence, the exact cost of producing the 21st food processor is $38.52.

Part (B) Use the marginal cost to approximate the cost of producing the 21st food processor,

To find the marginal cost first differentiate the function with respect to x.

C(x) = 2500 + 50x -0.28x^2

C'(x) =50-0.56x

Now substitute x=21 in above function.

C'(x) =50-0.56(21)

C'(x) =50-11.76

C'(x) =38.24

The marginal cost to approximate the cost of producing the 21st food processor is $38.24

5 0
3 years ago
A student is assessing the correlation between the number of workers in a factory and the number of units produced daily. The ta
Vinil7 [7]

Part A: Yes there is. As the number of workers increases, so does the production.

Part B:    y = 5x + 2

Part C: The slope indicates that for every person there is 5 units being produced, and the y-intercept indicates that 2 units are being made every day, regardless of if there are no workers ( this, however is unrealistic but it is how the data is )

6 0
2 years ago
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