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Contact [7]
3 years ago
10

Find the value of two numbers if their sum is 23 and their difference is 5

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
6 0

Let the two numbers be represented by x and y respectively.

Then x + y = 23, and x - y = 5.  

Solve this system of linear equations for x and y.  Start by rearranging them vertically:

x + y = 23

x - y = 5

---------------   Combining the two equations eliminates y:

2x = 28.

Then x = 14.  If x = 14, then 14 + y = 23, and y = 9..

The solution is (14, 9);  that is, x = 14 and y = 9.

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An experiment consist of rolling 3 fair dice (1 red die, a blue die, and a white die) and recording the number rolled on each di
Setler79 [48]
In 1, t<span>here are 6 outcomes for each die, so for three dice, the total combination is 6 x 6 x 6 = 216 outcomes. Hence, t</span><span>he probability of any individual outcome is 1/216 </span>

The outcomes that will add up to 6 are 
<span>1+1+4 </span>
<span>1+4+1 </span>
<span>4+1+1 </span>
<span>1+2+3 </span>
<span>1+3+2 </span>
<span>2+1+3 </span>
<span>2+3+1 </span>
<span>3+1+2 </span>
<span>3+2+1 </span>
<span>2+2+2 </span>

<span>Hence the probability is </span><span>10/216 </span>

In 3, the minimum sum of the three dice is 3. so we start with this 
<span>P(n = 3) </span>
<span>1+1+1 ; </span><span>1/216 </span>

<span>P(n = 4) </span>
<span>1+1+2 </span>
<span>1+2+1 </span>
<span>2+1+1 ; </span><span>3/216 </span>

<span>P(n = 5) </span>
<span>1+1+3 </span>
<span>1+3+1 </span>
<span>3+1+1 </span>
<span>1+2+2 </span>
<span>2+1+2 </span>
<span>2+2+1; </span><span>6/216 

The sum in 3 is 10/216 or 5/108</span>
3 0
3 years ago
Sorry if you can’t read it but help! If you can
drek231 [11]

Answer:

I believe that it is D

Step-by-step explanation:

A is wrong...

B is wrong (I believe)...

C is wrong...

So D is the only answer choice left.

3 0
2 years ago
Read 2 more answers
80 points just please help
Arlecino [84]

Answer:

F

Step-by-step explanation:

If you used the first one

(4÷4) (4÷4) = 1 which is correct.

input the values in the equations and check each one

5 0
3 years ago
Read 2 more answers
How much 78 octane gas and 91 octane gas should be blended to make 13 gallons of 85 octane gas
Tatiana [17]
13 x 85 = 1105
78 + 91 = 169

169 / 1105 = 6.5
5 0
3 years ago
Read 2 more answers
I need this please 64 points!
myrzilka [38]

Answer:

None. Wanda's work is correct.

Step-by-step explanation:

The first is correct.

3 0
3 years ago
Read 2 more answers
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