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RideAnS [48]
3 years ago
14

The difference between two numbers is 10 and their sum is 20. Find the biggest number.

Mathematics
1 answer:
marysya [2.9K]3 years ago
8 0

Answer:

15

Step-by-step explanation:

x - y = 10, then x = 10 + y

x + y = 20

substitute for x:

10 + y + y = 20

2y = 10

y = 5

x = 10 + 5 = 15

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Roll two fair dice. Each die has six faces. A. Let A be the event that either a 3 or 4 is rolled first followed by an odd number
zhenek [66]

Answer:

A. 0.16

B. 0.58

C. No

D. Dependent

Step-by-step explanation:

A.

The sampling space has 36 outcomes.

The event A has 6 outcomes (3,1), (3,3), (3,5), (4,1), (4,3),(4,5)

So P(A)= 6/36 = 0.16

B.

The table in the picture shows the 15 outcomes that are not allowed, so there are 36-15 = 21 possible outcomes for B and its probability is 21/36 = 0.58

C.

Are A and B mutually exclusive events?

No since their intersection is not empty, for example (3,1) belongs to both A and B

D.

In order for A and B to be independent, it must happen that

P(A∩B)=P(A)P(B)

A∩B={(3,1),(3,3),(4,1)} so P(A∩B) = 3/36  

whereas

P(A)P(B) = (6/36)(21/36) = (1/6)(7/12)=7/72

So A and B are not independent.

7 0
4 years ago
Can someone please help me on the multiple choice 1-3 please ? Im stuck please
Makovka662 [10]

Answer:

1. (4)x + y =50

  2x + 4y =172

2. (1)x + y =8

   150x + 50y =800

3. (1)x + y =20

   25 + 10y =290

Step-by-step explanation:

Just trust me and its too much work explaining and im lazy so just ask your teacher or a friend if you can.

3 0
3 years ago
A man sells a sofa for rs 3210 making a profit of 7% what would have been his profit percent if he had sold it for rs 3360?
Digiron [165]
Let x be the original cost for the sofa.
X x (1 + 0.07) =3210
X = 3000
Now we know the cost for the sofa.
Let p be the profit percent.
3000 x (1 + p) = 3360
P = 0.12
So the percentage profit is 12%
7 0
4 years ago
Fill in each blank for the function f(x) = 3x - 6.
IRINA_888 [86]

Answer:

reeee :(

Step-by-step explanation:

7 0
3 years ago
Which of the following represents 76% as a fraction in simplest form? A. 37/50 B. 19/25 C. 39/50 D. 17/25
lakkis [162]
I hope this helps you



76%


76/100


4.19/4.25


19/25
8 0
4 years ago
Read 2 more answers
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