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nataly862011 [7]
4 years ago
10

-1/2x+2=-x+7 i need to know

Mathematics
1 answer:
ludmilkaskok [199]4 years ago
6 0

=  \frac{ - 1}{ \:  \: 2} x + 2 = x + 7

=  \frac{ - 1}{ \:  \:  \: 2} x + 2 - x = 7

=  \frac{ - 3}{ \:  \:  \: 2}x  + 2 = 7

=  \frac{ - 3}{ \:  \ \:  2}x = 7 - 2

=  \frac{ - 3}{ \:  \: \:  2} x = 5

x = 5 \:  \div  \frac{ - 3}{ \:  \: \:  2}

x = 5 \times  \frac{ \:  \:  \: 2}{ - 3}

x =  \frac{ - 10}{ \:  \:  \: 3}

∴  \frac{ - 1}{ \:  \:  \: 2}  \times  \frac{ - 10}{ \:  \:  \: 3}  =  \frac{ - 10}{ \:  \:  \: 3}  + 7

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Which inequality models this problem? the length of a rectangle is three times its width. if the perimeter is at most 112 centim
SVETLANKA909090 [29]
2W + 2L = P

P is at most 112.......< or = 112
L = 3W

answer is :
2W + 2(3W) < = 112 (thats less then or equal)


4 0
3 years ago
In substitution what is the answer to y=x^2-10x+14 y=7x-16
Blababa [14]

Step-by-step explanation:

y=7x-16 we substitute in y=x^2-10x+14

7x-16=x^2-10x+14

x^2-10x-7x=-30

×^2-17x+30=0

x=2

×=15

5 0
3 years ago
System of Equations- pls help with the following problem
Sergeu [11.5K]

Answer:

b no.is the correct answer.

7 0
2 years ago
Is the expression a polynomial? If yes, write in standardform, if not state why not
Studentka2010 [4]

Answer:

Step-by-step explanation:

1) Not a polynomial. Because x² is in the denominator.

2) Yes, it is a polynomial.

Standard form: 5x² + 2x - 99

3) Not a polynomial.

\sqrt{8x^{3}} = (8x^{3})^{\frac{1}{2}} = 8^{\frac{1}{2}}x^{\frac{3}{2}} .

Power of x is a fraction. so , it is not a polynomial.

4) Power of x is (-2). Power of x should not be a negative integer. SO, it is not a polynomial.

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6 0
2 years ago
A lunch menu has a 4-piece lunch special which consists of a sandwich, soup, dessert and drink. They offer the following choices
ryzh [129]

Answer:

There are 160 possible 4-piece lunch special meal.

Step-by-step explanation:

The lunch menu has a 4-piece lunch special which consists of a sandwich, soup, dessert and drink.

The available options for the sandwiches, soups, desserts and drinks are:

Sandwich: chicken, cheese and tomato, tuna, ham and lettuce, turkey

Soup: tomato, chicken noodle, vegetable

Dessert: ice-cream, piece of cake

Drink: tea, coffee, Coke, Sprite

So, the number of options are:

n (Sandwich) = n (A) = 5

n (Soup) = n (B) = 4

n (Dessert) = n (C) = 2

n (Drink) = n (D) = 4

There are 5 ways to select a sandwich, 4 ways to select a soup, 2 ways to select a dessert and 4 ways to select a drink.

The total number of possible 4-piece lunch special is:

Total number of 4-piece lunch special = n (A) × n (B) × n (C) × n (D)

                                                                =5\times4\times2\times4\\=160\\

Thus, there are 160 possible 4-piece lunch special meal.

8 0
3 years ago
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