3 years ago

Evaluate the expression -4x+7 if x= -1

Mathematics

1 answer:

xxTIMURxx [149]3 years ago

7 0

Answer:

Step-by-step explanation:

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Will mark brainliest to whoever answers correctly first!!!

IgorLugansk [536]

To find the volume, you do area multiplied by thickness( or height)
In this example, you do (1/2*9*6)*10 which is 270
hope I helped ;)

7 0

3 years ago

A manufacturer produces bolts of a fabric with a fixed width. A quantity q of this fabric (measured in yards) that is sold is a

BigorU [14]

Answer:

$R'(20) = 2000$

Step-by-step explanation:

We are given the following in the question:

Quantity, q

Selling price in dollars per yard, p

$q=f(p)$

Total revenue earned =

$R(p)=pf(p)$

f(20)=13000

This means that 13000 yards of fabric is sold when the selling price is 20 dollars per yard.

f′(20)=−550

This means that increasing the selling price by 1 dollar per yards there is a decrease in fabric sales by 550.

We have to find R'(20)

Differentiating the above expression, we have,

$R'(p) = \displaystyle\frac{d(R(p))}{dp} = \frac{d(pf(p))}{dp} = f(p) + pf'(p)$

Putting the values, we get,

$R'(p) = f(p) + pf'(p)\\\\R'(20) = f(20) + 20(f'(20))\\\\R'(20) = 13000 + 20(-550) = 2000$

7 0

3 years ago

Which of the following proportions is TRUE? a. 1:4 = 2:5 b. 6:9 = 10:12 c. 5:11 = 15:30 d. 2:7 = 4:14

Vlad1618 [11]

2:7 = 4:14 because each is equal to 2/7. If you simplify 4:14 by dividing by 2, it simplifies to 2:7.

5 0

3 years ago

65006500 is 666 thousands plus 555 hundreds.

madam [21]

Answer:

Choice C

Step-by-step explanation:

5 Thousand + 15 hundred = 6500

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3 years ago

A car slows down at -5.00m/s^2 until it comes to a stop after traveling 15.0m how much time did it take to stop

Kruka [31]

Answer:

4.56 s

Step-by-step explanation:

4 0

3 years ago