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Hitman42 [59]
3 years ago
13

Find a value for each variable:1. -3(x – 7) – 11 = 28​

Mathematics
2 answers:
11111nata11111 [884]3 years ago
7 0

Answer: x=-6

Step-by-step explanation: I gtg to my next hour so cya

koban [17]3 years ago
6 0

Answer:

Step-by-step explanation:

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Assume the speed of vehicles along a stretch of I-10 has an approximately normal distribution with a mean of 81 mph and a standa
Pachacha [2.7K]

Answer:

Step-by-step explanation:

Hello!

The variable of interest is

X: speed of a vehicle along a stretch of I-10 (mph)

This variable has a normal distribution with mean μ= 81 mph and a standard deviation σ= 8 mph.

The speed limit in the said stretch is 65 mph.

You need to calculate the probability of picking a car at random and its speed be at most 65 mph, symbolically:

P(X≤65)

To reach the probability, you need to use the standard normal distribution. To standardize the value fo X you have to subtract the value of μ and then divide it by σ:

P(Z≤(65-81)/8)= P(Z≤-2.00)

Now you look for the corresponding probability in the table of the standard normal distribution, since the value is negative you have to use the left entry. The integer and first decimal numbers are in the first column and the second decimal number is in the first row.

P(Z≤-2.00)= 0.0228

I hope it helps!

3 0
4 years ago
4 - 7/x = 5 + 6/x <br>help me guys <br><br>​
Brilliant_brown [7]

Answer:

x = -13

Step-by-step explanation:

or, (4x-7)/x = (5x+6)/x

or, (4x-7) = (5x +6)

[the x gets cancelled when it comes to opposite side]

or, 4x-5x = 6+7

or, -x = 13

or, x = -13

8 0
3 years ago
HELP ASAP PLEASE you make $20 an hour and work fro 40 hours a week, you are paid biweekly and have $185 total deducted from your
VMariaS [17]

Answer:

615

Step-by-step explanation:u make $20 a week and u worked 40 hours u jus do 40*20=$800

800-185=615 im pretty sure hope this helps


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3 years ago
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Sent a picture of the solution to the problem (s).

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3 years ago
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