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IRINA_888 [86]
3 years ago
14

The sum of four,and the ptoduct of five and a number is twenty

Mathematics
1 answer:
lora16 [44]3 years ago
6 0
5n + 4 = 20
5n = 16
n = 16/5  = 3 1/5
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Joey had a balance of $250.50 in his account, and then he made a purchase for $317.25. What is the new
aivan3 [116]

Answer:

Joey has no money in his account. He is now indebted for $66.75

Step-by-step explanation:

250.5 - 317.25 = -66.75

4 0
3 years ago
Sue read 2/3 of the newest mystery book by her favorite author. Jack read 2/6 of the same book. Did Sue and Jack read the same a
KATRIN_1 [288]

Answer:

No

Step-by-step explanation:

Jack read 2/6 or 1/3. Sue read 2/3, twice as much.

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3 years ago
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Consider rolling two fair dice one 3-sided the other 5-sided
Ne4ueva [31]

Since the dice are fair and the rolling are independent, each single outcome has probability 1/15. Every time we choose

1\leq x\leq 3,\quad 1\leq y \leq 5

We have P(X=x)=\frac{1}{3} and P(Y=y)=\frac{1}{5}, because the dice are fair.

Now we use the assumption of independence to claim that

P(X=x, Y=y) = P(X=x)\cdot P(Y=y) =\dfrac{1}{3}\cdot\dfrac{1}{5} = \dfrac{1}{15}

Now, we simply have to count in how many ways we can obtain every possible outcome for the sum. Consider the attached table: we can see that we can obtain:

  • 2 in a unique way (1+1)
  • 3 in two possible ways (1+2, 2+1)
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This implies that the probabilities of the outcomes of W=X+Y are the number of possible ways divided by 15: we can obtain 2 and 8 with probability 1/15, 3 and 7 with probability 2/15, and 4, 5 and 6 with probabilities 3/15=1/5

8 0
3 years ago
Help me solve this equation and show work <br><br> 11d + 17b = 95 <br> d + b = 7
sweet-ann [11.9K]

Answer:

{d,b}={4,3}

Step-by-step explanation:

[1]    11d + 17b = 95

  [2]    d + b = 7

Graphic Representation of the Equations :

   17b + 11d = 95        b + d = 7  

 

Solve by Substitution :

// Solve equation [2] for the variable  b

 [2]    b = -d + 7

// Plug this in for variable  b  in equation [1]

  [1]    11d + 17•(-d +7) = 95

  [1]    -6d = -24

// Solve equation [1] for the variable  d

  [1]    6d = 24

  [1]    d = 4

// By now we know this much :

   d = 4

   b = -d+7

// Use the  d  value to solve for  b

   b = -(4)+7 = 3

Solution :

{d,b} = {4,3}

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2 years ago
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ASAP help me with this question
crimeas [40]

the equation of the line is y = 3x - 5

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3 years ago
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