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TEA [102]
3 years ago
15

Evaluate the algebraic expression for the given values of x = 3 and y = 4 7x - 2y - 1 =

Mathematics
1 answer:
stellarik [79]3 years ago
3 0

Step-by-step explanation:

The expression is 7x-2y-1.

If x=3, then you multiply 3 and 7.

7x3=21.

21-2y-1

If y=4, then you multiply 4 and 2.

4x2=8.

21-8-1

Then you combine like terms.

21-9

So the answer is 11.

Hope it helps!

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La funcion que representa el beneficio obtenido por una empresa si vende x unidades de uno de sus productos es f(x)= -70x^2+2800
DerKrebs [107]

Answer:

20

Step-by-step explanation:

La función es

f(x)=-70x^2+2800x-45000

Diferenciando con respecto a x obtenemos

f'(x)=-140x+2800

Igualar con cero

0=-140x+2800\\\Rightarrow x=\dfrac{2800}{140}\\\Rightarrow x=20

Doble derivada de la función

f''(x)=-140

Entonces, la función es máxima cuando el número de unidades vendidas,  x=20,

3 0
2 years ago
Find the volume of a prism-shaped watermelon in cubic inches if it's length is 10 inches, its width is 2/3 foot and it's height
Murljashka [212]
The volume is 60 cubic inches.

To solve, follow the formula Volume = Length · Height · Width. If you are solving without a calculator, simply multiply the length and the height first, then multiply the product of that by the width, 2 / 3.
V = 10 · 9 · 2/3
V = (10 · 9) 2/3
V = 90 · 2/3
<span>V = 60 in.³
</span>
Hope this helps. Good luck! :)
3 0
2 years ago
Eight times the sum of a number and two equals three
Westkost [7]

Answer:

8(x+2)=3

Step-by-step explanation:

x represents the number added to 2

i don't know how to explain sorry, i hope that helps you though :)

8 0
2 years ago
Which models show 40%? Check all that apply. A model with 4 shaded sections and 6 unshaded sections. A model with 40 shaded sect
Amanda [17]

Answer:

A model with 4 shaded sections and 6 unshaded sections.

A model with 40 shaded sections and 60 unshaded sections.

Step-by-step explanation:

Required:

Which models shows 40%

(a) 4 shaded and 6 unshaded

First, we calculate the total sections

Total = 4 + 6

Total = 10

The percentage of the shaded section is:

Shaded = \frac{4}{10} * 100\%

Shaded = 0.4 * 100\%

Shaded = 40\%

(b) 40 shaded and 60 unshaded

First, we calculate the total sections

Total = 40 + 60

Total = 100

The percentage of the shaded section is:

Shaded = \frac{40}{100} * 100\%

Shaded = 0.4 * 100\%

Shaded = 40\%

(c) 2 shaded and 8 unshaded

First, we calculate the total sections

Total = 2 + 8

Total = 10

The percentage of the shaded section is:

Shaded = \frac{2}{10} * 100\%

Shaded = 0.2 * 100\%

Shaded = 20\%

<em>Hence, (a) and (b) shows 40%</em>

8 0
2 years ago
Read 2 more answers
Find the domain of the function. (Enter your answer using interval notation.)
Rudik [331]
All real numbers since there is no exclusions. (-inf, inf)
7 0
3 years ago
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