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Pavel [41]
3 years ago
13

Haleys comet visits the inner solar system and is visible from earth roughly once 76 years Chinese astronomers recorded the earl

iest surviving documents of its appearance in 240 BC . Western astronomers began consistently recording the comets appearance when Haley appeared in 1378 how many times is Haley comet expected to be visible from earth between 1317 and 2317 inclusive ?
Mathematics
1 answer:
Naddika [18.5K]3 years ago
7 0
Idk ask mark Twain he knows he pridicted his death
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1)X²+5X-50=0<br>2)6²+6B-16=0<br>3)R²+6R+8=0<br>4)P²+5P+6=0​
zubka84 [21]

1) X²+5X-50=0

↠X² + 10X -5X -50 = 0

↠X(X+10)-5(X+10) = 0

↠(X-5)(X+10)=0

↠X = 5, -10

2)B²+6B-16=0

↠B² + 8B - 2B -16 = 0

↠B(B+8) -2(B+8) =0

↠(B-2) (B+8) =0

↠B = 2,-8

3)R²+6R+8=0

↠R²+4R+2R+8=0

↠R(R+4)+2(R+4)=0

↠(R+2)(R+4)=0

↠R=-2,-4

4) P²+5P+6=0

↠P²+3P+2P+6=0

↠P(P+3)+2(P+3)=0

↠(P+2)(P+3)=0

↠P=-2,-3

6 0
2 years ago
Read 2 more answers
What is the numerical coefficient of the linear term of the quadratic equation 3x2 − 9 =0?
babunello [35]

Answer:

0

Step-by-step explanation:

The numerical coefficient of the linear term of the quadratic equation is 0 because there is no linear term, and 0 times any number or term is 0, or nothing.

7 0
3 years ago
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 160 engines
abruzzese [7]

Answer:

Test statistic   Z = 2.1097

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given that size of the sample 'n' = 160

Given that mean of the Population(μ)  = 5.3pounds/square inch

The Standard deviation of the population(σ) = 0.6

Mean of the sample(x⁻) = 5.4

Level of significance =0.1

<u><em>Step(ii):-</em></u>

Test statistic

    Z = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }

   Z = \frac{5.4-5.3}{\frac{0.6}{\sqrt{160} } }

  Z = 2.1097

<u><em>Final answer</em></u>:-

Test statistic   Z = 2.1097

5 0
3 years ago
You drive your car for 4.5 hours at an average speed of 70 miles per hour how far did you go
SVEN [57.7K]
In this question, you are given the average speed of the car(70miles per hour) and the time of car travel(4.5 hours). The information is enough to find the car travelling distance. The equation would be:

Distance traveled= average speed * duration= 70miles/h * 4.5 h= 315miles
6 0
3 years ago
Gibraltar Construction was granted a 1-year construction loan of $650,000 to finance the construction of an apartment complex. G
GrogVix [38]
Given:
loan: 650,000
prime rate: 8.75%
interest rate of 0.75% ordinary interest over the prime rate

Interest rate: 8.75% + 0.75% = 9.5%

650,000 x 9.5% x 1 =  61,750 interest

maturity value: 650,000 + 61,750 = 711,750

5 0
3 years ago
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