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finlep [7]
3 years ago
5

How could you use the Commutative Property of Addition to rewrite the expression −21 + 7? A) −21(7) B) 3(−21) + 7 C) 7 + (−21) D

) 3(−7) + 21 Submit
Mathematics
1 answer:
Ierofanga [76]3 years ago
4 0

Answer:

C

Step-by-step explanation:

The commutative property of addition reorganizes parts of an equation without changing the answer. C includes the same numbers (-21, +7) without changing the answer (-14)

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What is the answer to this AND WHY! Thank you!<br><br> (−1+√5)/2​
postnew [5]

Answer: .618033989 or 618033989/1000000000 or 61% (Not rounded)

Step-by-step explanation:

-1+ (the sign)5 =  1.236067977 and if you divide that by two you get .618033989 or 618033989/1000000000 or 61% (Not rounded)

6 0
3 years ago
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Please help, I dont know the answer, can someone tell me the answer please and explain it?
sergiy2304 [10]

Answer:

Kristen is correct.

2^3 is the same thing as 2 times 2, times 2. 2 cubed = 8.

5 0
3 years ago
Simon has a certain length of fencing to enclose a rectangular area. The function AAA models the rectangle's area (in square met
pav-90 [236]

Answer:

When there is no width, the area is 0m²

Step-by-step explanation:

Expressing the area of a rectangle as a function of its width:

Area of a rectangle = Length * width

Since the area of rectangle is related to the width by the multiplication operatkr. We can conclude from the options given that ; if the value of width = 0 ; the the area of rectangular plot = 0

When x :

Area = Length * width

Area = Length * 0

Area = 0

Area = Length * 0

Aea = 0

4 0
3 years ago
1/2 mi = 880 yd<br> O True<br> O False<br><br><br><br> Help
Black_prince [1.1K]
I don’t know I am just guessing but it’s False good luck
5 0
4 years ago
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The density of ice is approximately 0.92 g/cm3 . If a block of ice has a volume of 2300 cm3, what is its mass?
Mumz [18]

Answer:

The mass of the ice block is 2116 grams ⇒ a

Step-by-step explanation:

The formula of density is p=\frac{m}{V} , where m is the mass and V is the volume

To find the mass from this formula multiply both sides by V,

then m = p.V

∵ The density of ice is approximately 0.92 g/cm³

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∵ m = p.V

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∴ m = (0.92)(2300)

∴ m = 2116 grams

The mass of the ice block is 2116 grams

7 0
3 years ago
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