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3 years ago

Simplify the following expression by combining like term show your work. 4x-6x

Mathematics

2 answers:

dem82 [27]3 years ago

4 0

Answer:

-2x

Step-by-step explanation:

four X's minus 6 X's leaves the absence of 2 X's

x x x x

- x x x x x x

_________

- x x

zubka84 [21]3 years ago

4 0

Answer:

-2x

Step-by-step explanation: A like term has the same variable and exponent. For example 3x^4 and 3x^3 are not like terms because they have different exponents and 3x^4 and 3y^4 are not like terms because they have different variables. In 4x-6x they are like terms. When you add or subtract like terms the variable and exponent stay the same so you only need to worry about the numbers out front which in this are 4 and 6. So when you have positive 4 and take 6 away you end up with -2 and since the variables and exponents stay the same you just add them back onto it and end up with -2x.

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Given that 99°, 153°, 162° are 3 of the interior angles of a n-sided polygon and that the remaining interior angles are 141° eac

Helen [10]

Answer:

n = 9

Step-by-step explanation:

The sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides

Given 3 angles and the remaining angle of 141° then there are

141(n - 3) angles of this size

Then

99 + 153 + 162 + 141(n - 3) = 180(n - 2) , that is

414 + 141n - 423 = 180n - 360

141n - 9 = 180n - 360 ( subtract 141n from both sides )

- 9 = 39n - 360 ( add 360 to both sides )

351 = 39n ( divide both sides by 39 )

9 = n

The polygon has 9 sides

8 0

3 years ago

Marcie cooked dinner for herself. The original recipe has a serving size of 4 and requires four and four fifths pounds of chicke

Margarita [4]

Answer:

1.2 pounds of chicken per serving.

Step-by-step explanation:

4 and 4/5 of pounds of chicken for serving of 4.

We can also write this as 4.8 pounds of chicken.

To find how much pound of chicken will be needed for a single serving we have to divide 4.8 by 4.

$\frac{4.8}{4} = 1.2 \: pounds \: of \: chicken$

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Thanks!

7 0

2 years ago

A textbook store sold a combined total of 289 sociology and math textbooks in a week. The number of math textbooks sold was 65 l

erica [24]

Answer:

Contradictrion

Step-by-step explanation:

First write an equation. If the total is 289, then that goes one the right side of the =. Sociology textbooks will be x. If there were 65 less than x, it will be 65-x. Lets set it up:

x + 65 -x =289

Then combine like terms.

65 = 289

There are no values of x that make the equation true. The input is a contradiction.

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8 0

3 years ago

The vertices of the triangle is A(-2,4), B(1,2), C(-2,-2)

spin [16.1K]

See description in the pic.