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3 years ago

What is the area of this trapezoid?

Mathematics

2 answers:

Agata [3.3K]3 years ago

6 0

The are of the trapezoid is 360

il63 [147K]3 years ago

3 0

A = B1 + B2/2 x H

First add the bases.
Base 1 (top) . 4 + 15 + 6 = 25.
Base 2(bottom) 15.
25 + 15 =40.

Next divide by 2
40 ÷ 2 = 20.

Last. Multiply by height.
The height of this trapezoid is 7in because the height must be perpendicular to the base. (NOT the SLANTED LINE)
20 x 7 = 140.
Don't forget the Units of measure!
Because this is area 140 in. = 140²

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Consider the following hypothesis test:H0: 20Ha: < 20A sample of 60 provided a sample mean of 19.6. The population standard d

elixir [45]

Answer:

a: z = -1.936

b: 0.0265

d: z < -1.645

Reject H0 if z < -1.645

Step-by-step explanation:

We are given:

H0: µ = 20

HA: µ < 20

n = 60, sample mean: 19.6, σ = 1.6

Since the alternate hypothesis has a < sign in it, it is a left tailed test. The < or > sign in the alternate hypothesis points towards the rejection region.

For a: We need to calculate the test statistic for our situation. This is done with a z-score formula for samples.

For b: we need to use the z-score table to look up the p-value for the score we calculate in part a. The p-value is 0.0265. This means that there is only about a 2.65% chance that the sample values were a result of random chance.

For d: Since the significance level is 0.05, and this is a one tailed test, we have a critical value of z < - 1.645. This means that if the z-score we calculate in part a is less than -1.645, we will reject the null hypothesis

See attached photo for all the calculations!

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2 years ago

17. Simplify (3 × 22) ÷ 6 + [28 – (4)2] = ?

Effectus [21]

Answer:

Step-by-step explanation:

(3*22=66) / 6 + [28n - (4)2=20]

66 /6 = 11+ [20]

11+20= 31

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3 years ago

What the answer please help me i need it now I’ll mark brainleist.

Vesna [10]

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Step-by-step explanation:

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2 years ago

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Jlenok [28]

An equilateral shape is a shape that has all congruent sides.

Sandy has a greater probability of selecting an equilateral shape

Given

Sandy: Equilateral triangle, Rhombus, and Regular hexagon

Robert: Scalene triangle, Kite, Isosceles trapezoid, Non-special quadrilateral, and Obtuse isosceles triangle

All three shapes in Sandy's shape bucket are equilateral.

So, the probability that Sandy picks an equilateral shape is 1

All five shapes in Robert's shape bucket are non-equilateral.

So, the probability that Robert picks an equilateral shape is 0

By comparing the probabilities:

1 is greater than 0

Hence, Sandy is more likely to pick an equilateral shape than Robert.