All categories

3 years ago

Solve the equation -6(2a + 7) = -22- 8a

Mathematics

2 answers:

Andru [333]3 years ago

3 0

Answer: a = -5

Step-by-step explanation:

First, open up the brackets, and solve it

-12a -42 = -22 -8a. (-6 x 2a, and -6 x 7)

bring the -8a to the left side, so that all the a’s are together

-12a -42 + 8a = -22 (add -42 on both sides like we did with -8a)

-12a + 8a = -22 + 42

solve

-4a = 20

divide -4 on both sides

a = -5

katen-ka-za [31]3 years ago

3 0

Answer:

a=-5

Step-by-step explanation:

Here you go mate

PEMDAS: Parenthesis,Exponent,Multiplication,Division,Addition,Subtraction

Step 1

-6(2a + 7) = -22- 8a Equation/Question

Step 2

-6(2a + 7) = -22- 8a Remove parenthesis

-12a-42=-8a-22

Step 3

-12a-42=-8a-22 Add 8a to the sides

-4a-42=-22

Step 4

-4a-42=-22 Subtract 42

4a=20

Step 5

4a=20 Divide both sides by 4

answer

-5

You might be interested in

What is the slope of the line through (-7.-2) and (-6,7)

Xelga [282]

Answer:

gradient = 9

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Name the geometric terms modeled by a wall <br> and floor

Gwar [14]

The geometric terms modelled will be:

1. Plane

2 Point

3Point

4Plane

5Line

6.Point

7Point

8 Plane

9.Plane

10.Line

It should be noted that a line is a one-dimensional figure, that has length but no width. It should be noted that a line is made of a set of points that is extended in opposite directions.

The plane is flat surface.

Learn more about line on:

brainly.com/question/1655368

#SPJ1

Name the geometric term modeled by each object.

1. wall of a classroom

2. a knot in a piece of thread

3. tip of a needle

4 floor of a room

5 edge of a table

6. tip of a pencil

7 far distant star

8 screen of a flat TV

9 sheet of paper

10. light beam

7 0

1 year ago

Can you help me to solve this

Ber [7]

Answer:

$\frac{4a-2}{2a+1}$

Step-by-step explanation:

Factorise the numerator and denominator

8a² - 2 ← factor out 2 from each term

= 2(4a² - 1) ← 4a² - 1 is a difference of squares

= 2(2a - 1)(2a + 1)

4a² + 4a + 1 ← is a perfect square

= (2a + 1)²

Thus

$\frac{8a^2-2}{4a^2+4a+1}$

= $\frac{2(2a-1)(2a+1)}{(2a+1)(2a+1)}$ ← cancel (2a + 1) on numerator/ denominator

= $\frac{2(2a-1)}{2a+1}$

= $\frac{4a-2}{2a+1}$

3 0

2 years ago

Read 2 more answers

A number greater than 40 whose prime factorization contains 3 prime numbers that do not repeat

Tomtit [17]

That is true because factors of 40 are 10,5

5 0

2 years ago

Juan tiene cubos azules de 55 mm de arista y cubos rojos de 45 mm de arista. Los apila en dos columnas, una de cada color ; quie

balu736 [363]

the question in English

Juan has blue cubes with a 55 mm edge and red cubes with a 45 mm edge. He stacks them in two columns, one of each color; he wants the two columns to be the same height. How many cubes does he need, as a minimum, of each color?

Let

x---------> the number of blue cubes

y--------> the number of red cubes

we know that

Juan wants that the two columns to be the same height

$55x=45y$

solve for y

$y=\frac{55}{45}x$

I proceed to calculate a table, assuming values of x to calculate the value of y. When the values of x and y are whole numbers, I will have found the solution.

the table in the attached figure

therefore

<u>the answer is</u>

9 blue cubes

11 red cubes

7 0

2 years ago