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alexira [117]
3 years ago
13

Simplify 31/2 + 42/4

Mathematics
2 answers:
Vladimir79 [104]3 years ago
4 0

\frac{31}{2}+ \frac{42}{4}

Make the denominators the same in order to add them together

\frac{2}{2} (\frac{31}{2}) +  \frac{42}{4} = \frac{62}{4}+ \frac{42}{4} =\frac{104}{4} = 26

kykrilka [37]3 years ago
3 0
The answer is 26. (Change denominators
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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
densk [106]

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:

1 Grand price = $3000

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.

5 0
3 years ago
3(x+5)^2-12=0. What does x equal
STALIN [3.7K]

Answer:

x=−3 or x=−7

Step-by-step explanation:

Let's solve your equation step-by-step.

3(x+5)2−12=0

Step 1: Simplify both sides of the equation.

3x2+30x+63=0

Step 2: Factor left side of equation.

3(x+3)(x+7)=0

Step 3: Set factors equal to 0.

x+3=0 or x+7=0

x=−3 or x=−7

8 0
2 years ago
Read 2 more answers
Quick I need help 23 and 24 easy seventh grade math
Alekssandra [29.7K]

Answer:-14, -26

Step-by-step explanation:

13-4=9

4-9=-5

From here you can see that the pattern is -9

-5-9=-14

23. is -14

16-2=14

2-14=-12

From here you can see that the pattern is -14

-12-14=-26

24. is -14

6 0
3 years ago
2 1/4 r= 10<br> A. r = 4 1/3<br> B. r = 4 2/5<br> C. r = 4 4/9
max2010maxim [7]
Here, 2 1/4 r = 10
9/4 r = 10
r = 10*4 /9
r = 40 / 9
r = 4 4/9

In short, Your Answer would be Option C

Hope this helps!
8 0
3 years ago
One cases of books weight 35 pounds.One case of magazines weights 23 pounds.A book store wants to ship 72 cases of books and 94
schepotkina [342]
I'm sorry but it's bugging me that you aid 'one cases', you can't have the plural of something that is strictly singular.

Now: for your answer.
72*35=2520
94*23=2162
2520+2162=4682

The total wight is 4682 pounds.

Hope this helps
6 0
3 years ago
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