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3 years ago

40 - 2x [(8 x 3 + 6) +12 -2 pls answer correctly

Mathematics

2 answers:

oksano4ka [1.4K]3 years ago

5 0

Answer:

-10

Step-by-step explanation:

40 - 2x [(8 x 3 + 6) + 12 -2

Using BODMAS meaning Bracket Of Division Multiplication Addition and Subtract

Solve Bracket first multiplying first inside the bracket then add your result

40 - 2x [(8 x 3 + 6) + 12 -2

40 - 2x [(24 + 6) + 12 -2

40 - 2x(30) + 12 -2

Multiple

40 - 60+12-2

-10

Degger [83]3 years ago

3 0

Answer:

40 is the answer . is it right or Not?

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Solve the system or linear equations

Vanyuwa [196]

Answer:

37. {-1, -1}.

Step-by-step explanation:

I'll solve the first one . The other can be solved in a similar way. We can use the method of elimination.

x1 - x2 = 0

3x1 - 2x2 = -1

We can multiply the first equation by -2. We then have an equation containing + 2x2 so when we add this to the second equation the 2x2 will be eliminated

So the first equation becomes:

-2x1 + 2x2 = 0 Bring down the second equation:

3x1 - 2x2 = -1 Now adding, we get:

x1 + 0 = -1

so x1 = -1.

Now we substitute this value of x1 in the original first equation:

-1 - x2 = 0

-1 = x2

x2 = -1.

So the solution set is {-1, -1}.

If there are more than 2 equations you can use a combination of substitutions and eliminations.

8 0

3 years ago

The length of a room is 18

Virty [35]

Question:

The length of a room is 18 1 /2 feet. If using 1 /4 inch = 1 foot scale, what would be the length of a wall on a blueprint of a floor plan?

Answer:

The length of a wall on a blueprint of a floor plan is $4.625 \text{ or } 4\frac{5}{8} \text{ inches }$

Solution:

Given that,

$Length\ of\ room = 18\frac{1}{2} \text{ feet }\\\\Length\ of\ room = 18.5 \text{ feet }$

The scale given is:

$\frac{1}{4}\ inch = 1\ foot$

To find: Length of a wall on a blueprint of a floor plan

Let "x" be the length of a wall on a blueprint of a floor plan

Then from given,

$\frac{1}{4}\ inch = 1\ foot\\\\x\ inches = 18.5\ feet$

This forms a proportion and we can solve by cross multiplying

$\frac{1}{4} \times 18.5 = x \times 1\\\\x = 4.625\\\\In\ terms\ of\ mixed\ fraction,\\\\x = 4\frac{5}{8}$

Thus length of a wall on a blueprint of a floor plan is $4.625 \text{ or } 4\frac{5}{8} \text{ inches }$

3 0

3 years ago

Read 2 more answers

Is AB parallel to CD?

Katen [24]

You have to evaluate the slopes of these lines. For line AB you have a slope of
$\frac{1 - ( - 3)}{0 - ( - 3)} = \frac{4}{3}$
For line CD you have a slope of
$\frac{ - 1 - ( - 5)}{3 - 0} = \frac{4}{3}$
Because the slopes are equal and the two lines are not one and the same, they are parallel.

6 0

3 years ago

The model includes a new park in the center of the city. If the dimensions of the

11111nata11111 [884]

The question is incomplete. Here is the complete question.

As a part of city building refurbishment project, architects have constructed a scale model of several city builidings to present to the city commission for approval. The scale of the model is 1 inch = 9 feet.

The model includes a new park in the center of the city. If the dimensions of the park in the model are 9 inches by 17 inches, what are the actual dimensions of the park?

Answer: 81 feet by 153 feet

Step-by-step explanation: Unit Scale is a ratio comparing actual dimensions of an object to the dimensions of model representing the actual object.

In the refurbishment project, the unit scale is given by

1 inch = 9 feet

So, the dimensions of the new park in actual dimensions would be

1 inch = 9 feet

9 inches = x

x = 9.9

x = 81 feet

1 inch = 9 feet

17 inches = y

y = 17.9

y = 153 feet

The actual dimensions of the new park are 81 feet by 153 feet.

6 0

3 years ago

Ak190 has the best answers

cupoosta [38]

Answer:

bhi

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

40 - 2x [(8 x 3 + 6) +12 -2 pls answer correctly​

40 - 2x [(8 x 3 + 6) +12 -2 pls answer correctly