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amm1812
3 years ago
14

Find two numbers, if their sum is 49 and their difference is 1/2 .

Mathematics
1 answer:
Sever21 [200]3 years ago
6 0

Answer: 49.5 and -0.5

Step-by-step explanation:

a  + b =49

a -  b = 0.5

a= 49.5

b= -0.5

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Two friends race against each other in 100-meter and 800-meter races. Of the 200 races they ran this year, the wins, losses, and
Travka [436]

Answer:

Its a long answer.........

Let makes the table neater. event D= 100m, even E=800m

                                            (Event D) (Event E)

A won the race (Event A)     30           50

B won the race (Event B)     60           25

A and B tied (Event T)          10            25

B did not win the race today. What length of the race was it more likely to have been? The question is asking in what event did the chance of B did not win(lose + ties) is more likely. Then, you need to determine the chance for B did not win in both race.

Chance of B did not win 100-m= 30+10/10=40%

Chance of B did not win 800-m= 50+25/10=75%

The difference would be 75%-40%=35% more likely to lose 800-m race

________________________________

1. What percentage of all the races are ties?

IfThe chance for the race become tie is 10% for 100m and 25% for 800m. Assuming that the 200 race is divided equally, then there would be 100 race of 100-m and 100 race of 800-m.

The number of the event of ties would be:

(100*10% + 100*25%)/ 200= 35/200= 17.5%

__________________________________

2. If someone wins the race today, is it more likely for A to win or B to win? How much more likely?The event should be independent because the two events should not influence each other. That means the probability will not change and no one becomes more likely to win the next race.

Credits: Brainly and Sisters math notebook(cuz to cross check);)

8 0
3 years ago
What does 45 - 4x equal
xxTIMURxx [149]
Let y = 0 to find the x-intercept(s).

0 = 45 − 4x

*Then subtract 45 from both sides*
-45 = -4x

*Next, DIVIDE both sides by -4*

-45
—— = x
-4

*NEXT, realize that TWO NEGATIVES MAKE A POSITIVE *

45. 4
——— = x {FLIP} x=——-
4. 45.


y-Intercept

Let x = 0 to find the y-intercept(s).


y = 45 −4(0)

NEXT, SIMPLIFY:

y=45
7 0
4 years ago
What operations do you use when factoring to get the “c” or last number?
Eduardwww [97]
When you get to “c“ or the last number you add
6 0
3 years ago
Anne rolls a die. What is the<br> chance of her rolling a 2?
egoroff_w [7]

Answer:

1/6 chance or 16.66%

Step-by-step explanation:

5 0
4 years ago
The cafeteria uses many cases of tuna that each have 24 cans. Each week, they take at least 12 of the cans to feed the cats in t
Leni [432]

In this question, we're trying to find the cost of feeding the cats for a year.

We know that we use 12 cans to feed the cats

We also know that each can costs $0.60

To find how much the cafeteria spent on the cats, we need to see how much 12 cans cost, and multiply that by 52 to get our yearly cost

Solve:

12 · 0.60 = 7.2

12 cans = $7.20

Now multiply 7.20 by 52 to get our minimum yearly cost for the cats.

52 · 7.20 = 374.4

This means that it costs $374.4 to feed the cats for a year.

Answer

$374.40

5 0
3 years ago
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