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2 years ago

How do the rules for adding and subtracting signed decimals compare with the rules for adding and subtracting integers?

1 answer:

3 0

If sign is the same add and keep the sign

If the sign is different subtract and keep the sign of larger absolute value

Subtraction rules: add opposite and then use addition rules

You might be interested in

How many times does 8 go into 8

Hunter-Best [27]

Only 1 time because your talking about division so u have to divide 8 into 8 which it only goes in 1 time:)

7 0

3 years ago

Read 2 more answers

If 6 pipes fill a tank in 120 minutes, then 5 pipes can fill it in how many minutes

Marianna [84]

Answer:

It'll take 144 minutes for 5 pipes.

Step-by-step explanation:

${ \sf{6 \: pipes = 120 \: mins}} \\ { \sf{5 \: pipes = ( \frac{6}{5} \times 120) \: mins}} \\ \\ = { \sf{144 \: mins}}$

but practically, it seems to be abnormal. if 6 pipes take 120 mins, 5 pipes must takes a time greater than 120 mins cause amount of water flowing to the tank is decreasing.

But there is a possibility that pressure of water was increased for the case of five pipes, that's why it takes a time less than 120 mins. (t < 120)

5 0

2 years ago

Read 2 more answers

What is the perimeter of a square which has the same area as a circle with circumfrence of 4π

Kruka [31]

Answer:

Perimeter square = 8 sqrt(pi)

Step-by-step explanation:

The perimeter of a square is 4*s

The area of a circle is Area = pi * r^2

The circumference of a circle is C = 2*pi * r

C = 4 pi

4pi = 2*pi * r

r = 2

So the area of the circle is pi * r^2 = pi * 2^2 = 4pi

The square has the same area

Area = 4*pi

Square = 4*pi

s^2 = 4*pi

s = sqrt(4*pi)

s = 2*sqrt(pi)

The perimeter = 4 * 2 * sqrt(pi)

The perimeter = 8 * sqrt(pi)

8 0

2 years ago

Which of the following do you use to tell whether a relationship is proportional or not?

Setler79 [48]

Answer:

The correct option to tell whether a relationship is proportional or not is;

$\dfrac{y}{x}$

Step-by-step explanation:

A proportional relationship is a relationship between two variables, 'x', and 'y' such that they have equivalent ratio, such that all values of variable 'y' are given by the product of the values of the variable 'x' and a constant, 'k'

Therefore, y = k · x, from which we have;

$\dfrac{y}{x} = k = Contant$

Therefore we can use $\dfrac{y}{x}$ to tell whether a relationship is proportional or not proportional.

6 0

3 years ago

Quadrilateral ABCD is inscribed in this circle. What is the measure of angle C?

Shkiper50 [21]

Answer:

107 degrees

Step-by-step explanation:

For an inscribed quadrilateral, the opposite angles are supplementary. Thus, B+D = 180 and you can solve for x.

3x+9+2x-4 = 180

5x = 175

x = 35

Next, plug the x value into angle A.

2(35) + 3 = 73

Angle C is the supplement of this which is 180-73 = 107

6 0

3 years ago