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4 years ago

Name the property that each

Mathematics

1 answer:

emmasim [6.3K]4 years ago

5 0

(12 + 3) + 32 = 12 + (3 + 32)

Associative property of addition: if you have to sum three or more terms, you can group them as you like.

14(1/14) = 1

Multiplicative inverse: a number multiplied by its inverse is 1

27 + 0 = 27

Identity element of addition. If you sum any number with zero, the result is the number you started with.

11(4y – 9) = 44y - 99

Distributive property of addition: if you have to multiply a whole sum/subtraction by a number, it is the same as multiplying each term in the sum/subtraction by that number.

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if j is 21 inches, k is 12 inches, and angle M measures 62 degrees, then find m using the Law is Cosines. round your answer to t

AURORKA [14]

Answer:

18.7

Step-by-step explanation:

The Law of Cosines is $c^2=a^2+b^2-2ab cos(C)$ , where c is the unknown side length of a triangle, a and b are the remaining two side lengths, and C is the angle opposite to side c. To answer this question just plug in the known values:

$m^2=21^2+12^2-2(21)(12) cos(62)$

Simplify:

$m^2=441+144-504 cos(62)$

$m^2=585-504 cos(62)$

$m=\sqrt{585-504cos(62)}$

m≈18.665...

When rounded to the nearest tenth, m=18.7

6 0

3 years ago

{8} ⊆ {7,8,9} true or false

Natalija [7]

the answer is false

.....................................

6 0

3 years ago

Read 2 more answers

A supermarket had bags of red apples for $27.09 for 7. The also had bags of green apples priced at $14.96 for 4. Which type of a

jarptica [38.1K]

Answer:

Red

Step-by-step explanation:

RED:

$27.09 / 7 = $3.87

GREEN:

$14.96 / 4 = $3.74

$3.87 > $3.74

7 0

3 years ago

A castle is surrounded by a circular moat which is 5 m wide

Elanso [62]

Answer:

1414 kL

Step-by-step explanation:

The volume of the donut-shaped moat is the product of its surface area and depth. The area is the product of its centerline length and its width.

The diameter of the centerline of the moat is (50 m -5 m) = 45 m. The length of that centerline is ...

C = πd = π(45 m) = 45π m

The area is this length times the width of the moat:

moat area = (45π m)(5 m) = 225π m²

<h3>Moat volume</h3>

The volume is the product of the area and the depth of the moat:

V = Ah = (225π m²)(2 m) = 450π m³ ≈ 1413.72 m³

1 cubic meter is 1000 liters, 1 kiloliter.

The volume of the moat is about 1414 kL.

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2 years ago

Which unit would you use to measure the height of a giraffe? mm cm m km

aliina [53]

Answer:

centimeters

Step-by-step explanation:

6 0

4 years ago