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Annette [7]
3 years ago
7

How are the rules for adding and subtracting negative numbers similar to adding and subtracting positive numbers? Justify your r

esponse with an example
Mathematics
1 answer:
Fantom [35]3 years ago
8 0

Answer: the rules are

+(+) Two like signs become a positive sign

−(−) 6−(−3) = 6 + 3 = 9

+(−) Two unlike signs become a negative sign

−(+)

Step-by-step explanation:

Example:  3+(+2) = 3 + 2 = 5, 6−(−3) = 6 + 3 = 9, 7+(−2) = 7 − 2 = 5,8−(+2) = 8 − 2 = 6  hope this helps you :)

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A standard deck of cards contains 52 cards. One card is selected from the deck. ​(a) Compute the probability of randomly selecti
Masja [62]

Answer:

a) 1/2 = 50%

b) 3/4 = 75%

c)  1 / 52 or 1,9%

Step-by-step explanation:

In a standard deck of cards, there are 52 cards in total:

13 are hearts, 13 are diamonds, 13 are clubs and 13 are spades.

​(a) Compute the probability of randomly selecting a club or spade

How many cards are a club or a spade?

C = 13 clubs + 13 spades = 26 cards

Out of the 52 total, that means that:

P (club or spade) = 26/52 = 1/2 = 50%

​(b) Compute the probability of randomly selecting a club or spade or heart. ​

How many cards are a club or a spade?

C = 13 clubs + 13 spades  + 13 hearts = 39 cards

Out of the 52 total, that means that:

P (club or spade or heart) = 39/52 = 3/4 = 75%

(c) Compute the probability of randomly selecting a two or diamond.

There's only ONE two of diamond in  regular deck of cards, so...

P(2 of diamond) = 1 / 52 or 1,9%

7 0
3 years ago
I need help pleaseee!!!
ZanzabumX [31]

Answer: x = 57

Step-by-step explanation:

Since CD = AC, triangle ACD is isosceles, therefore

ADC = DAC

ADC + DAC + 112 = 180

ADC + DAC = 180 -112 = 68

ADC + DAC = 68/2 = 34

DEB = 180 - 34 - 23 = 123 (sum of interior angles of a triangle = 180)

Therefore, x = 180 - 123 = 57  (DEB and x are supplementary angles)

6 0
1 year ago
HELP NOWWWWW PLEASEEE
Mrac [35]

Answer:

D. 69.2

Step-by-step explanation:

v= 3.14 ×2.1^2 × 5

v = 69.237

when you round it, it is

69.2 cubic cm

6 0
3 years ago
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Your class decides to sell bags of popcorn as a fundraiser. The cost to rent the popcorn machine is $15.00, and it costs $0.10 a
LuckyWell [14K]

Answer:

a

Step-by-step explanation:

4 0
3 years ago
Find the percent of each number. 17% of 200 books 35% of 80 letters
natita [175]

Answer:

17% of 200 books is 34 books. 35% of 80 letters is 28 letters.

Step-by-step explanation:


8 0
3 years ago
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