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2 years ago

If x = 2 and y = -3, what is the value of 2x^2 + 3xy – 2y^2?

Mathematics

1 answer:

sammy [17]2 years ago

7 0

Answer: Given as,X=2 & Y=3,

now multiplying we get,

2xxy=2×2×3=12

Ans.) 12

Step-by-step explanation:

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Plzzz me and I will make you the brainiest (Promise)

Setler79 [48]

Answer:

idk but trump 2020

Step-by-step explanation:

6 0

3 years ago

The total cost (in dollars) for a company to manufacture and sell x items per week is C = 40 x + 640 , whereas the revenue broug

ikadub [295]

Answer:

The company must sell 60 or 70 items to obtain a weekly profit of 200.

Step-by-step explanation:

The profit is the difference between the revenue and the cost of a given task, therefore:

$\text{profit} = R - C\\\text{profit} = 66*x - 0.2*x^2 - (40*x + 640)\\\text{profit} = 66*x - 0.2*x^2 - 40*x - 640\\\text{profit} = - 0.2*x^2 + 26*x - 640$

To have a profit of 200, we need to sell:

$-0.2*x^2 + 26*x - 640 = 200\\-0.2*x^2 + 26*x -840 = 0\text{ } *\frac{-1}{0.2}\\x^2 -130 + -4200 = 0\\x_{1,2} = \frac{-(-130) \pm \sqrt{(-130)^2 - 4*1*(-4200)}}{2*1}\\x_{1,2} = \frac{130 \pm \sqrt{16900 + 16800}}{2}\\x_{1,2} = \frac{130 \pm \sqrt{100}}{2}\\x_{1,2} = \frac{130 \pm 10}{2}\\x_{1} = \frac{130 + 10}{2} = \frac{140}{2} = 70\\ x_{2} = \frac{130 - 10}{2} = \frac{120}{2} = 60$

The company must sell 60 or 70 items to obtain a weekly profit of 200.

3 0

3 years ago

Find the exact solution to the equation 10-log8(x+2)=9

ohaa [14]

Answer:

-0.89269063 ...

Step-by-step explanation:

Put it in the calculator

8 0

3 years ago

HELP DUE IN 10 MINUTES!

vfiekz [6]

Answer:

Step-by-step explanation:

97.65 is roughly 100

68℅ of 100 is 68

so it's 68

5 0

3 years ago

Read 2 more answers

Write the number of measures (sides/angles/diagonals) needed to construct the following :

gladu [14]

Square :4 sides,each side 90 degrees ..

:each angle is 90 degrees

: 4 diagonals

Rectangle: 4 sides..4 angles..2 diagonals..
Rhombus : 4 sides..2 angles...2 diagonals..
Parallelogram : 4 sides..4 angles..2 diagonals..
Quadrilateral: 4 sides...4 angles...4 diagonals..

If this answer helps you plz mark as brainlist..

3 0

3 years ago