2 years ago

why might you want to use the commutative property to change the order of the intergers in the following sum before adding? -80+

(-173)+(-20)

Mathematics

1 answer:

serious [3.7K]2 years ago

6 0

$-80+ (-20)+(-173)=-80-20-173=-100-173=-273$

You might be interested in

The probability that a train leaves on time is 0.9. The probability that the train arrives on time and leaves on time is 0.36. W

ASHA 777 [7]

P(arrives on time given leaves on time)=
P(B | A)= P(B n A) / P(A)
= P(A n B) / P(A)
= 0.36 / 0.9
= 0.4

5 0

3 years ago

Read 2 more answers

A pipe is 30 feet long. it need to be cut into pieces that are each 2/3 ft long how many pieces can be made from the pipe? answe

AysviL [449]

Answer:

Divide total length by length of each piece to get the number of pieces.

= 30 ÷ 2/3

multiply by reciprocal of 2/3

= 30 * 3/2

= 90/2

= 45

ANSWER: Total number of pieces that can be cut is 45.

7 0

2 years ago

Round 3.691 to the nearest tenth.

Alja [10]

3.691 rounded by the nearest tenth is 3.7

5 0

2 years ago

Read 2 more answers

Find the length of the shorter diagonal of a rhombus if:

Fudgin [204]

a) Area of rhombus = ½ * (diagonal1)*(diagonal 2)

Let diagonal (D2 )= longer diagonal = 15 and diagonal (D1) = shorter diagonal

90 = ½ (D1)*15

90 = 7.5 D1

Now divide both side by 7.5

90/7.5 = d1

D1= 12 units.

b) Area of rhombus = ½ * (diagonal1)*(diagonal 2)

Let the ratio be $x$

Diagonal 1= $2x$

Diagonal 2= $3x$

147 = ½ * $(2x)*(3x)$

Multiply both side by 2

294 = $(2x)*(3x)$

294 = 6 $x^2$

Divide both side by 6

294/6 = 6 $x^2$ /6

49 = $x^2$

$x$ = 7 unit

8 0

2 years ago

The circumference of a circle is 19π in. What is the area, in square inches? Express your answer in terms of π.

Lelu [443]

Answer:

A = 90.25 pi in^2

Step-by-step explanation:

The circumference is given by

C = 2*pi*r

19pi = 2*pi*r

Divide each side by 2 pi

19pi / 2 pi = 2*pi*r/ 2pi

9.5 = r

The area is given by

A = pi r^2

A = pi ( 9.5)^2

A = 90.25 pi in^2

8 0

2 years ago

Read 2 more answers