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2 years ago

sam correctly answered 80 of the questions on his last math test if he missed 3 problems how many questions were on the test

1 answer:

6 0

If sam correctly answered 80 of the questions on his last math test but missed 3 problems, there was 83 questions on the test.

80 + 3 = 83

God bless!

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Step-by-step explanation:

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3 years ago

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In a math class of 30 students, 17 are boys and 13 are girls. on a unit test, 4 boys and 5 girls made an a grade. if a student i

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There are 13 girls and 4 more students that are boys that made an A grade. Thus there are 13+4=17 students that are either girls or A students.

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2 years ago

The number of square feet per house is normally distributed with a population standard deviation of 154 square feet and an unkno

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Answer: (1500.66,1599.34)

Step-by-step explanation:

Confidence interval for population mean:

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

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$1550\pm (1.2815)\dfrac{154}{\sqrt{16}}\\\\ = 1550\pm (1.2815)\dfrac{154}{4}\\\\= 1550\pm 49.33775\\\\ =(1550-49.33775,\ 1550+49.33775)\\\\\approx (1500.66,\ 1599.34)$

Required confidence interval: (1500.66,1599.34)

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2 years ago

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Answer:

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3 years ago