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3 years ago

Simplify the following expression: (12x – 7) + (7x + 9)

Mathematics

2 answers:

soldi70 [24.7K]3 years ago

6 0

Answer:

Step-by-step explanation:

Natasha2012 [34]3 years ago

5 0

Answer:

Step-by-step explanation:

12x + 7x = 19x

-7 + +9 = 2

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Formula for the flow of current in an electrical circuit, V= IH, for I

HACTEHA [7]

Answer:V/H=I

Step-by-step explanation:

v=IH

V/H=I

3 0

3 years ago

Rewrite the following equation in standard form. y = -7x - 1

Lady bird [3.3K]

Standard form is written Ax + By = C where A, B, and C are all integers.

In other words, no fractions.

Also, the A or the coefficient of the x term must be positive.

The only thing we need to do is add 7x to both sides to get 7x + y = -1.

So 7x + y = -1 is our answer.

5 0

4 years ago

Read 2 more answers

Solve the system of linear equations by substitution. y = 2x + 8 y = -2x

posledela

Answer:

(- 2, 4 )

Step-by-step explanation:

y = 2x + 8 → (1)

y = - 2x → (2)

substitute y = 2x + 8 into (2)

2x + 8 = - 2x ( add 2x to both sides )

4x + 8 = 0 ( subtract 8 from both sides )

4x = - 8 ( divide both sides by 4 )

x = - 2

substitute x = - 2 into (2)

y = - 2(- 2) = 4

solution is (- 2, 4 )

6 0

3 years ago

Read 2 more answers

Suppose you have a bag containing 2 black marbles and 3 red marbles. You reach into the bag, select a marble, see what color it

TiliK225 [7]

Answer:

$\dfrac{9}{25}$

Step-by-step explanation:

Given that the bag contains black and red marbles.

Number of black marbles in the bag = 2

Number of red marbles in the bag = 3

Total number of marbles in the bag = Number of black marbles + Number of red marbles = 2 + 3 = 5

Let us have a look at the formula for probability of an event E, which can be observed as:

$P(E) = \dfrac{\text{Number of favorable cases}}{\text {Total number of cases}}$

$P(\text{First red marble}) = \dfrac{\text{Number of red marbles}}{\text{Total number of marbles}} = \dfrac{3}{5 }$

Now, the marble chosen at first is replaced.

Therefore, the count remains the same.

$P(\text{Second red marble}) = \dfrac{\text{Number of red marbles}}{\text{Total number of marbles}} = \dfrac{3}{5}$

Now, the required probability can be found as:

$P(\text{First red marble})\times P(\text{Second red marble}) = \dfrac{3}{5}\times \dfrac{3}{5} = \bold{\dfrac{9}{25} }$

3 0

3 years ago

Decide which of the following sets of points.

Luden [163]

Answer:

Im pretty sure that the answer would be choice f.

Step-by-step explanation:

7 0

3 years ago