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3 years ago

-18 = -6n - 6 + 2n Solve for n.

Mathematics

1 answer:

vodomira [7]3 years ago

3 0

Answer:

n = 3

Step-by-step explanation:

-18 = -6n - 6 + 2n

-18 = -6n +2n -6 (Combine like terms)

-18= -4n -6

-18+6= -4n -6+6 (Addition Property of Equality)

-12 = -4n

-12/-4 = -4n/-4 (Division Property of Equality)

3=n

The value of 'n' is 3.

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Tell whether the angles are adjacent or vertical. Then find the value of x.

Gwar [14]

Answer:

x = 128

Step-by-step explanation:

Adjacent angles - Angles right next to each other. They share a common vertex

Vertical angles - angles that are vertically aligned with each other.

The angle that has a measure of 128 degrees and x are vertical angles

If you didn't know vertical angles are congruent so because one angle equals 128 degrees the other equals 128 degrees

x = 128

6 0

3 years ago

Read 2 more answers

What is 8(2x+5)=16x+40?

polet [3.4K]

Answer:

x = infinite amount of solutions

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Step-by-step explanation:

Step 1: Define Equation

8(2x + 5) = 16x + 40

Step 2: Solve for x

Distribute 8: 16x + 40 = 16x + 40
Subtract 40 on both sides: 16x = 16x
Divide 16 on both sides: x = x

Here we see that x does indeed equal x.

∴ x has an infinite amount of solutions.

3 0

3 years ago

Aratati ca A=ab+ba-aa-bb este pătrat perfect DAU FUNDA PLZZZZ

Nataly [62]

Answer:

Aratati ca numarul A=ab+ba-aa-bb este patrat perfect ( deasupra la ab ba aa bb este o linie orizontala) b)determinati nr ab astfel incat B=ab+5ab-126 sa fie patrat perfect ( deasupra la ab 5ab este o linie orizontala) c) aratati ca 25=3²+4² si 625=7²+24²

Step-by-step explanation:

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5 0

4 years ago

Which of the following points represents -2 1/4?

Studentka2010 [4]

Point E represents -2 1/4

5 0

4 years ago

(iii) (3x + 4)(3x - 5)

kiruha [24]

Answer:

$x_{1}=-\frac{4}{3}\\x_{2}=\frac{5}{3}\\$

Step-by-step explanation:

$(3x+4)(3x-5)=9x^{2} -15x+12x-20=9x^{2} -3x-20\\\\9x^{2} -3x-20=0\\\\D=b^{2} -4ac=(-3)^{2}-4*9*(-20)=9+720=27^{2} \\\\x_1_,_2=\frac{-b +_- \sqrt{D} }{2a}\\\\x_1=\frac{3-27}{18}=\frac{-24}{18} =-\frac{4}{3}\\\\x_2=\frac{3+27}{18}=\frac{30}{18} =\frac{5}{3} \\\\$

6 0

3 years ago

-18 = -6n - 6 + 2n Solve for n. ​

-18 = -6n - 6 + 2n Solve for n.