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2 years ago

I need help with this I got -10 is it right??

Mathematics

1 answer:

Dahasolnce [82]2 years ago

7 0

Answer:

-14

Step-by-step explanation:

difference between -20 and -5 = 15

15 x 2/5 = 30/5 = 6

-20 + 6 = -14

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Calculate the perimeter of the composite figure. Round your answer to the nearest hundredth. Use 3.14 for $\pi$ .

Elena-2011 [213]

1. Perimeter is 3 + 3 +3 +4 +5 = 18 feet

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2. perimeter = 2.5 +2.5+ 2.5+2.5+0.5+0.5 = 11 meters

Area = 3*.5 = 1.5, 3*2=6, 6+1.5 = 7.5 square meters

3. perimeter = 3.14*2*3 = 18.84 +8 = 26.8 inches

Area = 6*4 = 24 + 3.14*3^2 = 28.26 = 28.26 +24 = 52.3 inches

4. surface area = 2*π*6*20+2*π*6^2= 980.2 yards

Volume = π*6^2*20 = 2261.9 cubic yards

5.surface area = 2*(9*7+2*2+2*9) = 190 cm

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1 year ago

Please help me!

svlad2 [7]

T(m) = 0.25m

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2 years ago

Can you conclude with a high degree of confidence that the population means for Iowa and New Jersey students are different? A.

Katen [24]

Complete Question

The complete question is shown on the first uploaded image

Answer:

Option A is correct

Step-by-step explanation:

From the question we are told that

The 95% confidence interval of the mean score of all New Jersey third graders is (58.957 , 63.043)

The sample size is n = 184

The sample average is $\mu = 65 \ points$

The standard deviation is $\sigma = 13 \ points$

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The p-value is $p-value = 0.0048$

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Hence the population means are different .

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x $\geq$ 12.5

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