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bagirrra123 [75]
3 years ago
11

Amy has 2 rows of 4 sports trophies on each of her 3 shelves. how many sports trophies dies amy have

Mathematics
2 answers:
Nesterboy [21]3 years ago
4 0
24 I think is the answer but I'm not sure.  Hope I helped:)
Dmitry_Shevchenko [17]3 years ago
3 0
24 trophies. you multiply 4 and 2 then multiply that by 3
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The perimeter of a regular pentagon is 200 centimeters. how long is each side?
brilliants [131]
X= length of each side in cm

Pentagon= 5 sides

Pentagon Perimeter= 5x
substitute the perimeter

200= 5x
divide both sides by 5

40cm= x


ANSWER: The length of each side of the pentagon is 40cm.

Hope this helps! :)
5 0
3 years ago
what is the surface area of a pyramid if the length and width is 10 inches and the height is 9 inches?
pav-90 [236]
Answer is 380 inches squared. The bottom side is 10x10 which is 100, then all 4 sides are 10x7 which is 70, but you have to multiply that by 4 so it becomes 280. Then you add 280 and 100, the final answer is 380in^2
4 0
3 years ago
On a scatter plot what does it mean when both variables are increasing
STatiana [176]
Both are getting bigger or increasing you need to rephrase the question 
4 0
3 years ago
Read 2 more answers
HELPPPPP !!!!!!! Please answer correctly Will mark Brianliest !!!!!!!!!!
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5 0
3 years ago
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n automobile manufacturer claims that its van has a 37.4 miles/gallon (MPG) rating. An independent testing firm has been contrac
JulsSmile [24]

Answer:

Then z(s) is out of the acceptance region, we reject H₀,  doubts of the independent testing firm are valids

Step-by-step explanation:

We will develop a Hypothesis Test ( a 2 tail test since the independent testing firm is interested in finding out  if there is an incorrect MPG rating from the manufacturer

Test Hypothesis :

Null hypothesis                             H₀            μ    =    μ₀

Alternative Hypothesis                Hₐ             μ    ≠    μ₀

Significance Level   α  = 0,05    α/2  =  0,025

z(c) for α/2   from z-table      z(c)  = - 1, 96   and by symmetry  z(c) = 1,96

Calculating  z(s)

z(s) =  ( μ  -  μ₀ ) / σ /√n

z(s) = ( 37,8 - 37,4 ) / 2,3 /√280

z(s) = 0,4 * 16,73 / 2,3

z(s) = 2,90

Comparison between z(c)  and  z(s)

z(s) > z(c)       2,90 > 1,96

Then z(s) is out of the acceptance region, we reject H₀,  doubts of the independent testing firm are valids

8 0
2 years ago
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