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dedylja [7]
2 years ago
7

What is the value of x? x+15=2x-40

Mathematics
2 answers:
IrinaVladis [17]2 years ago
7 0

Answer:

55 =x

Step-by-step explanation:

x+15=2x-40

Subtract x from each side

x-x+15=2x-x-40

15 = x-40

Add 40 to each side

15+40 = x-40+40

55 =x

andreev551 [17]2 years ago
4 0

Answer:

x = 55

Step-by-step explanation:

x+15=2x-40

take away x from both sides and add 40 on both sides to get the like terms on each side

55 = x

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Your school’s baseball team sells 1250 raffle tickets at $4 each. The grand prize is a $3000 boat. The second prize is a $450 gr
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Answer:

The expected value of the winnings for a single-ticket purchase is -$1.0016.

Step-by-step explanation:

The total number of tickets sold is, <em>N</em> = 1250.

Cost of one ticket is, $4.

Let <em>X</em> = amount of prize.

The prize distribution is as follows:

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1 Second prize = $450

10 Third prize = $25

The expected value <em>X</em> can be computed using the formula:

E(X)=\sum x.P(X)

Compute the probability distribution of <em>X</em> as follows:

     Prize        Amount (X)         P (X)                    x · P (X)

1 Grand prize    $3000         \frac{1}{1250}=0.0008     \$3000\times 0.0008=2.4

1 Second prize  $450          \frac{1}{1249}=0.0008      \$450\times 0.0008=0.36

10 Third prize      $25          \frac{10}{1248}=0.008        \$25\times 0.008=0.2

No prize             -$4      1-\sum P(Win)\\=0.9904   -\$4\times 0.9904=-3.9616

TOTAL                              1.0000                            -1.0016

Thus, the expected value of the winnings for a single-ticket purchase is -$1.0016.

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