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3 years ago

Which shape is always a rhombus?

Mathematics

1 answer:

GREYUIT [131]3 years ago

3 0

Answer:

B- A square because it has 4 sides that are the same length.

Explain:

I misread earlier, but a rhombus is defined as a quadrilateral with four equal-legnth sides and opposite sides parallel to each other. All squares have all of these properties.

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Dylan lives about 27 miles from the mall. If he can drive at an average rate of 36 miles per hour through town, about how long d

Vlad [161]

Answer:

45 minutes

Step-by-step explanation:

distance / rate = time

27 miles / 36 miles/hr = .75 hr ( 45 minutes )

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2 years ago

They need to make room for the 2022 model.

Elena-2011 [213]

I don’t know I just need points lol

4 0

2 years ago

A triangle with two 8

tekilochka [14]

Answer:

One unique triangle

Step-by-step explanation:

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3 years ago

The following question has two parts. First, answer part A. Then, answer part B.

Arturiano [62]

Answer:

Part A: 13.2

Part B: see below

Step-by-step explanation:

Part A:

13.245 rounded to tenths is 13.2

Part B:

The rule is ...

Add 1 in the number place you're rounding to if the digit to its right is 5 or more. Drop (or zero) all digits to the right of the place you're rounding to.

Here, the digit to the right of the tenths place is 4, so no action is taken other than dropping digits to the right of the tenths place.

3 0

3 years ago

A student group claims that first-year students at a university must study 2.5 hours (150 minutes) per night during the school w

AlekseyPX

Answer:

We have strong evidence that on average, students study less than 150 minutes per night during the school week

Step-by-step explanation:

Normal distribution:

mean μ₀ = 150

Sample:

Sample size n = 272

Sample mean x = 141

Sample standard deviation s = 66

The standard error of the sample mean SE = σ /√n

SE = 66/√272

SE = 66 / 16,49

SE = 4

Test Hypothesis:

Null hypothesis H₀ x = μ₀

Alternative hypothesis Hₐ x < μ₀

z(s) test statistics is:

z(s) = ( x - μ₀ ) / s/√n

z(s) = - 9 /4

z(s) = - 2,25

p-value for that z(s) p-value = 0,0122

Then for α = 0,05 p-value < 0,05

We are in the rejection region we need to reject H₀

7 0

3 years ago