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3 years ago

- 12 ÷ (-4) How do I solve this?

2 answers:

3 0

Two negatives make a positive so that is going to produce a positive number so -12÷-4 you just do normal division like always and it equals a great positive 3

murzikaleks [220]3 years ago

3 0

Step-by-step explanation:

We're going to be diving -12 by -4.

What do we need to know?

Integer Rule - when 2 negative numbers multiply or divide, the product/quotient is positive.

Solve using the integer rule:

$-12 \div -4 =3$ is the same as $12 \div 4 = 3$

3 is your quotient.

You might be interested in

What is the slope of the line that passes through (-6,2) and (-3,4)? HELP!!!

dolphi86 [110]

Answer:

<h2>the slope is 2/3</h2>

Step-by-step explanation:

You can solve it many ways but i worked it like this

(-6,2) and (-3,4)

you set 4-2 over -6 - -3

u get 2/3

and thats your slope

Your welcomeee!!!!!!!!!!!!!!1

6 0

3 years ago

A college student completed some courses worth 3 credits and some courses worth 4 credits. The student earned a total of 59 cred

quester [9]

Answer:

He completed 13 courses worth 3 credits and 5 courses worth 4 credits.

Step-by-step explanation:

Let

Number of courses worth 3 credits = x

Number of courses worth 4 credits = y

1. The student completed a total of 18 courses, then

$x+y=18$

2. The student earned a total of 59 credits, he earned 3x on 3 credits' courses and 4y on 4 credits' courses, so

$3x+4y=59$

3. You get the system of two equations:

$\left\{\begin{array}{l}x+y=18\\ \\3x+4y=59\end{array}\right.$

From the first equation

$x=18-y$

Substitute it into the second equation:

$3(18-y)+4y=59\\ \\54-3y+4y=59\\ \\4y-3y=59-54\\ \\y=5\\ \\x=18-5=13$

He completed 13 courses worth 3 credits and 5 courses worth 4 credits.

6 0

3 years ago

The lengths of a lawn mower part are approximately normally distributed with a given mean = 4 in. and standard deviation = 0.2 i

Charra [1.4K]

Answer:

68 %

Step-by-step explanation:

Let's call X to the random variable ''lengths of a lawn mower part''.

X ~ N(given mean;standard deviation)

X ~ N(4 in;0.2 in)

To find the percentage,first we are going to turn this random variable X into a random variable Z. Z will be a N(0;1)

We do this by subtracting the given mean to the original variable and dividing by it deviation.

P (3.8 in < X < 4.2 in) =

P [(3.8 in - 4 in) / (0.2 in)] < [(X - 4 in)] / (0.2 in) < [(4.2 in - 4 in) / (0.2 in)]

P ( -1 < Z < 1 ) = P (Z < 1) - P (Z< -1)

Where we can find P (Z < 1) and P (Z< -1) in any table of a N(0;1)

P (Z < 1) - P (Z< -1) = 0.8413 - 0.1587 = 0.6826 = 68%

5 0

3 years ago

Read 2 more answers

An 8-car Ferris wheel is shaped like a regular octagon. Does the Ferris wheel have rotational symmetry?

sleet_krkn [62]

Answer:

Yes, it does.

Step-by-step explanation:

Every regular shaped figure will have rotational symmetry, since they are built with identical segments all around.

To find the answer, ask yourself « If I rotate the shape, is there a time where I’ll find the exact same shape again with a different angle? »

So, a square has rotational symmetry, but not a rectangle.

A equilateral triangle has rotational symmetry, but not any other type of triangle.

8 0

3 years ago

A truck can be rented from Company A for $100 a day plus $0.50 per mile. Company B charges $40 a day plus $0.80 per mile to

Rus_ich [418]

Answer:

18 miles

Step-by-step explanation:

Let

The number of miles = x .

According to Question ,

100 + 0.5(x) = 40 + 0.8(x)
100 + 0.5x = 40+ 0.8x
100 - 40 = 0.8x - 0.5x
60 = 0.3x
x = 60/3 * 10
x = 18

7 0

3 years ago

- 12 ÷ (-4) How do I solve this? ​

- 12 ÷ (-4) How do I solve this?