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Alekssandra [29.7K]
3 years ago
15

Please help the question is below

Mathematics
1 answer:
slava [35]3 years ago
6 0

Answer:

x = -8

Step-by-step explanation:

We have,

x-3y=136\ ...(1)

and

18x+3y=-288\ ....(2)

Adding equation (1) and (2) we get :

19x=-152\\\\x=-8

So, the value of x is -8.

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There are 15 hearts because 5*3 is 15
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The average fuel efficiency of U.S. light vehicles for 2005 was 21 mpg. If the standard deviation of the population was 2.9 and
statuscvo [17]

Answer:

1) The probability that the mean mpg for a random sample of 25 light vehicles is 0.042341.

2) between 20 and 25 --> 21-25/2.9 = -1.38

Step-by-step explanation:

Problem #1:

  • Using the z-score formula, z = (x-μ)/σ/n, where x is the raw score = 20 mpg,μ is the population mean = 21 mpg , σ is the population standard deviation = 2.9, n = random number of samples.
<h3><u>X < 20</u></h3>
  • = z = 20 - 21/2.9/√25
  • = z = -1/2.9/5
  • = z = -1.72414
<h2><u><em>Now</em></u></h2>

<em>P-value from Z-Table:</em>

<h3><u>P(x<20) = 0.042341</u></h3>

Problem #2:

<h3>21-25/2.9 = -1.38</h3>
6 0
2 years ago
twin oaks soccer field is a rectangle. The longer side of the field is 108 yards long. The shorter side is 56 yards long. What i
Rus_ich [418]

Answer:

P = 328 yards

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formula is P= 2l + 2w

p  =  2(108) + 2(56) \\  = 216 + 112 \\  = 328  \: yards

5 0
2 years ago
I hate this, I’m not sure how to do these
Triss [41]

Answer:its B....sorry i didnt read the qn properly earlier

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This is because the equation is in the slope intercept form: y = mx + b.
The perpendicular line to one with m = -1/3, is the negative reciprocal of m, we'll call it m2.
m2 = --3/1 = +3/1 = 3
4 0
3 years ago
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