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2 years ago

How do u add and subtract negative fractions?

2 answers:

8 0

When you are adding or subtracting a negative fraction, you usually want to consider the numerator as negative. The method is just the same, except now you may need to add negative or positive numerators. The LCM of and is . To add the fractions with unlike denominators, rename the fractions with a common denominator.

Montano1993 [528]2 years ago

4 0

It’s just like solving a positive fraction find a common denominator and Add or subtract

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Scott likes to run long distances. He can run 20 km in 85 minutes. He wants to know how many minutes (m) it will take him to run

gtnhenbr [62]

You wanna
divide 85 and 52
because he can run 20 KM in 85 min
and he wants to see how long it takes him to run 52 KM
So the first one is correct

4 0

3 years ago

Find the slope and the y-intercept of the equation below:

AveGali [126]

Answer:

m = 4/3; b = -4
m = 3; b = -6

Step-by-step explanation:

In each case, <em>solve for y</em>. You do this by getting the y-term by itself, then dividing by the coefficient of y.

-3y = -4x +12 . . . . . subtract 4x

y = 4/3x -4 . . . . . . . divide by -3

The slope is 4/3; the y-intercept is -4.

y = 3x -6 . . . . . . divide by 2

The slope is 3; the y-intercept is -6.

_____

<em>Additional comment</em>

Whatever you do to one side of the equation, you must also do to the other side. When we say "subtract 4x", that means 4x is subtracted from both sides of the equation. The reason for doing that in the first equation is to eliminate the 4x term from the left side.

(Sometimes, you may see operations described as "move ...". There is no property of equality called "move." There are <em>addition</em>, <em>subtraction</em>, <em>multiplication</em>, <em>division</em>, and <em>substitution</em> properties of equality. Any equation solving process will make use of one or more of these.)

8 0

2 years ago

A shipping company is creating their own shipping boxes. They have created a box with a volume of 800in^3 , a height of 8 inches

Firdavs [7]

Answer:

Length = 10 inches

Width = 10 inches

Step-by-step explanation:

The perimeter of the base is 40 inches, so we can write the following equation:

2*Length + 2*Width = 40

Length + Width = 20 (eq1)

The volume of the box is 800 in3, so we have:

800 = Length*Width*8

Length*Width = 100 (eq2)

From the (eq1), we have:

Length = 20 - Width

Using this value of Length in (eq2), we have:

(20 - Width)*Width = 100

20*Width - Width^2 - 100 = 0

Using Bhaskara's formula, we have:

Delta = b^2 - 4ac = 400 - 400 = 0

Width = -b/2a = -20/(-2) = 10 inches

Length = 20 - Width = 20 - 10 = 10 inches

So the length is 10 inches and the width is 10 inches

3 0

3 years ago

Read 2 more answers

Find the height and area of the equilateral triangle

sergejj [24]

As here we are given with an equilateral triangle, whose side is 3 cm, and we need to find the height and area of the equilateral triangle. So, for this let's recall that, the area of any equilateral triangle with side a is given by ;