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2 years ago

Just out of curiosity, what is (-7)-(+6)?

Mathematics

1 answer:

zimovet [89]2 years ago

5 0

The answer is (-7)-(6)= -1

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Evaluate the expression 2a + 3b + 6 when a=2 and b=4

Vitek1552 [10]

Answer:

22 or 4+12+6

Step-by-step explanation:

Since A is equal to 2, times 2 by 2 and get 4

Since B= 4 you times 3 by 4 and get 12

4+12 is 16

16 plus 6 is 22

5 0

3 years ago

Which system of equation should you use to solve this problem

Alex17521 [72]

Last option is the correct answer.

Step-by-step explanation:

Given that

Let x stand for the solution a and y stand for the solution B

So,

According to statement that

30 gallons have to be made

$x+y=30$

Solution A contains 29 percent bromine => 0.29x

Solution B contains 53 percent =>0.53y

And the mixture of 30 gallons contains 45% bromine

$0.29x+0.53y=30*0.45\\0.29x+0.53y=13.5$

Following equations will be used for solving the problem

$x+y = 30\\0.29x+0.53y=13.5$

Hence,

Last option is the correct answer.

Keywords: Equations, Variables

Learn more about linear equations at:

#LearnwithBrainly

4 0

2 years ago

Solve y=-x+2 and y=-2x-1 as a graph, substitution, or elimination?

kotegsom [21]

Answer:

(- 3, 5 )

Step-by-step explanation:

Given the 2 equations

y = - x + 2 → (1)

y = - 2x - 1 → (2)

Using substitution method.

Substitute y = - x + 2 into (2)

- x + 2 = - 2x - 1 ( add 2x to both sides )

x + 2 = - 1 ( subtract 2 from both sides )

x = - 3

Substitute x = - 3 into (1)

y = - (- 3) + 2 = 3 + 2 = 5

Solution is (- 3, 5 )

8 0

2 years ago

If a whole pan of brownies is being sold for $16, how much it cost to purchase 3/4<br> of the pan?

KATRIN_1 [288]

Answer:

$12

Step-by-step explanation:

We have to do this operation:

(16/4) x 3 = 4 x 3 = $12

5 0

2 years ago

Read 2 more answers

The area of the entire large rectangle

Luda [366]

There is no rectangle but the formula is

$a = l \times w$

5 0

2 years ago