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3 years ago

Evaluate the expression 2x + x, when x = -3. O A -12 O B-9 OC -3 ooo

Mathematics

1 answer:

svp [43]3 years ago

5 0

Answer:

Option B) -9 is correct

The evaluated given expression when x=-3 is 2x+x=-9

Step-by-step explanation:

Given expression is 2x+x

Now to evalute the given expression when x=-3 as below :

2x+x when x=-3

That is put x=-3 in the given expression we get

2x+x=2(-3)+(-3)

=-6-3

=-9 ( adding the like terms here )

Therefore 2x+x=-9

The evaluated given expression when x=-3 is 2x+x=-9

Option B) -9 is correct

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An electrician needs 6 rolls of electrical wire to wire each room in a house. How many rooms can he wire with 3/4 of a roll of w

Vera_Pavlovna [14]

Answer:

1/8 room

Step-by-step explanation:

(3/4 roll)/(6 rolls/room) = (3/4)(1/6) rooms = 1/8 rooms

With 3/4 roll of wire, the electrician can wire 1/8 of a room.

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3 years ago

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monitta

Answer: D: Half turn about the origin

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3 years ago

Read 2 more answers

The equation of the line that goes through the point (1,5) and is parallel to the line 3x+5y=2 can be written in the form y=Mx+b

Llana [10]

Answer:

$y=-\frac{3}{5}x+\frac{28}{5}$

Step-by-step explanation:

step 1

Find the slope of the given line

we have

$3x+5y=2$

isolate the variable y

$5y=-3x+2\\\\y=-\frac{3}{5}x+\frac{2}{5}$

The slope of the given line is

$m=-\frac{3}{5}$

step 2

Find the equation of the line that goes through the point (1,5) and is parallel to the given line

Remember that

If two lines are parallel then their slopes are equal

therefore

we have

$m=-\frac{3}{5}$

$point\ (1,5)$

substitute in the equation of a line in slope intercept form

$y=mx+b$

$5=-\frac{3}{5}(1)+b$

solve for b

$b=5+\frac{3}{5}\\\\b=\frac{28}{5}$

substitute

$y=-\frac{3}{5}x+\frac{28}{5}$

3 0

4 years ago

Find the probability of this trial, x=8, n=11, p=0.9 where x is the successes in n trials

Oliga [24]

I just did some work for this, and I believe the correct answer is b. 7%.

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4 years ago

Madison invests money in an account paying a simple interest of 3.2% per year.If she invests $160 and no money will be added or

Tamiku [17]

The amount of interest she will earn in one year will be 5 dollars and 12 cents.

<h3>What is Simple interest?</h3>

The normal interest levied on the amount borrowed from any bank on a yearly basis is called the simple interest.

Given that:-

The interest of 3.2% per year
Invests $160 and no money will be added or removed from the investment.

The simple interest amount will be:-

SI = ( P x R x T ) / 100

SI = ( 160 x x 3.2 x 1 ) / 100

SI = $5.12

Therefore the amount of interest she will earn in one year will be 5 dollars and 12 cents.

To know more about simple interests follow

brainly.com/question/25793394

#SPJ1

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3 years ago