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katovenus [111]
3 years ago
12

A number x divided by 7 is less than or equal to -19

Mathematics
1 answer:
Verdich [7]3 years ago
8 0

Answer:

x-7 > -19  

     _

Step-by-step explanation:

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Every day a factory produces 5000 light bulbs, of which 2500 are type 1 and 2500 are type 2. if a sample of 40 light bulbs is se
alisha [4.7K]
<span>The solution: = 40, p = q = 0.5 P[x] = nCx *p^x *q^(n-x) when p = q = 0.5, the formula simplifies to P[x] = nCx/2^n = 40Cx/2^40 at least 18 of each type means 18 to 22 of (say) type I P(18 <= X <= 22) = 0.5704095 <------- qb mean = 40*0.5 = 20 SD = sqrt(npq) = sqrt(40*0.5*0.5) = 3.1623 z1= (18-20)/3.1623 = -0.63 , z2 = (22-20)/3.1623 = 0.63 P(-0.63 < z < 0.63) = 0.4713 <-------</span>
5 0
3 years ago
Diameter of a circle with a circumference of 55 feet rounded to the nearest hundredth
Ket [755]

Answer:

17.51

Step-by-step explanation:

Notes: Circumference= 2 times pi times r

Diameter is double the radius (2r)

How to solve: You just need to divide 55 feet by pi

2(pi)(r)/( pi) = 55/(pi)

2r = 17.51

diameter = 17.51

3 0
2 years ago
Two buses leave a station at the same time and travel in opposite directions. One bus travels 14 miles faster than the other. If
valkas [14]

If the two buses are 640 miles apart after 5 hours. Then the rate of each bus will be 57 miles per hour and 71 miles per hour.

<h3>What is speed?</h3>

The distance covered by the particle or the body in an hour is called speed. It is a scalar quantity. It is the ratio of distance to time.

We know that the speed formula

Speed = Distance/Time

Two buses leave a station at the same time and travel in opposite directions.

One bus travels 14 miles faster than the other.

Let x be the speed of first bus. Then the speed of the second bus will be (x + 14).

If the two buses are 640 miles apart after 5 hours.

Then the rate of each bus will be

Then the relative speed of the buses will be

S = x + x + 14

S = 2x + 14

Then the value of x will be

2x + 14 = 640 / 5

2x + 14 = 128

      2x = 114

        x = 57 miles per hour

Then the speed of the other bus will be

⇒ 57 + 14

⇒ 71 miles per hour

More about the speed link is given below.

brainly.com/question/7359669

#SPJ1

4 0
2 years ago
Solve the 5 questions. I beg you T_T (90 points!!!)
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Answer:

a c a b

Step-by-step explanation:

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