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Hatshy [7]
3 years ago
10

Simplify this 6x-3y-z+2x+3y-7z

Mathematics
1 answer:
erica [24]3 years ago
3 0

Answer:

8x - 8z.

Step-by-step explanation:

Let's first rearrange 6x-3y-z+2x+3y-7z where all the x's are together, all y's together, and all z's are together:

6x +2x + 3y - 3y - z - 7z.

First we combine like terms.

6x + 2x ⇒ 8x

3y - 3y ⇒ 0

z - 7z   ⇒ -8z.

Since the y's result in 0, we do not include them.

Therefore, our answer is 8x - 8z.

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2. y = k2 - 13k +42​
bekas [8.4K]

For this case we must solve the following quadratic equation:

y = k ^ 2-13k + 42

With y = 0 we have:

k ^ 2-13k + 42 = 0

The roots will be given by:

k = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}

Where:

a = 1\\b = -13\\c = 42

Substituting:

k = \frac {- (- 13) \pm \sqrt {(- 13) ^ 2-4 (1) (42)}} {2 (1)}\\k = \frac {13 \pm \sqrt {169-168}} {2}\\k = \frac {13 \pm \sqrt {1}} {2}\\k = \frac {13 \pm1} {2}

Thus, we have two roots:

k_ {1} = \frac {13 + 1} {2} = \frac {14} {2} = 7\\k_ {2} = \frac {13-1} {2} = \frac {12} {2} = 6

Answer:

k_ {1} = 7\\k_ {2} = 6

6 0
3 years ago
Learning Task 3
Serhud [2]

Answer:

Step-by-step explanation:

Conflict is

a.

the deliberate attempt to control a person by force, to oppose someone, or to harm another person.

b.

when two or more people or groups work together to achieve a goal that will benefit more than one person.

c.

a state of balance between cooperation and conflict.

d.

the division of labor.Conflict is

a.

the deliberate attempt to control a person by force, to oppose someone, or to harm another person.

b.

when two or more people or groups work together to achieve a goal that will benefit more than one person.

c.

a state of balance between cooperation and conflict.

d.

the division of labor.Conflict is

a.

the deliberate attempt to control a person by force, to oppose someone, or to harm another person.

b.

when two or more people or groups work together to achieve a goal that will benefit more than one person.

c.

a state of balance between cooperation and conflict.

d.

the division of labor.Conflict is

a.

the deliberate attempt to control a person by force, to oppose someone, or to harm another person.

b.

when two or more people or groups work together to achieve a goal that will benefit more than one person.

c.

a state of balance between cooperation and conflict.

d.

the division of labor.Conflict is

a.

the deliberate attempt to control a person by force, to oppose someone, or to harm another person.

b.

when two or more people or groups work together to achieve a goal that will benefit more than one person.

c.

a state of balance between cooperation and conflict.

d.

the division of labor.Conflict is

a.

the deliberate attempt to control a person by force, to oppose someone, or to harm another person.

b.

when two or more people or groups work together to achieve a goal that will benefit more than one person.

c.

a state of balance between cooperation and conflict.

d.

the division of labor.Conflict is

a.

the deliberate attempt to control a person by force, to oppose someone, or to harm another person.

b.

when two or more people or groups work together to achieve a goal that will benefit more than one person.

c.

a state of balance between cooperation and conflict.

d.

the division of labor.

8 0
3 years ago
What expression represents"one third of the difference between fifteen and some number"?
Scrat [10]
1/3(15 - p) or (15 - p) / 3...so it is A
6 0
3 years ago
A cube has six sides that are numbered 1 to 6. The sides numbered 1, 2, and 5 are green, and the sides numbered 3,4
Arturiano [62]

Answer:

the answer is 5/6

Step-by-step explanation:

got it right

5 0
4 years ago
Apply the markup or markdown to each item and then find the retail sale price of the following items. ​Round to two decimal plac
Elenna [48]
I just did on a calculator, I hope it helped a littler

8 0
3 years ago
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