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2 years ago

Abcd is a quadrilateral in which angle a = 40 degrees and angle b = 150 degrees. could abcd be a parallelogram?

1 answer:

4 0

No.

Adjacent angles of a parallelogram are supplementary. Adacent angles "a" and "b" add to 190°, not 180°, so are not supplementary.

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Janelys buys milk and apples at the store.

Natali5045456 [20]

Answer:

Each bag costs $4.75

Step-by-step explanation:

41.22 = 3.22 + 8x

38 = 8x

4.75 = x

7 0

2 years ago

A migrating bird flies 700 miles in 1414 hours. How many miles does it fly in 33 hours

Lisa [10]

In 1414 hours it covered 700 miles

In 1 hour it would have covered (700/1414) mile

In 33 hours it will then cover : 700/1414 * 33 = 16.34

So in 33 hours it will cover ≈ 16.34 miles.

5 0

2 years ago

Will mark brainliest!! please hurry!

andriy [413]

Answer:

its 300

Step-by-step explanation:

ik its is bc i got it right

3 0

2 years ago

A researcher is planning to compare the effects of two different types of lights on the growth of bean plants. She expects that

kicyunya [14]

Answer:

The sample size is $n = 36$

Step-by-step explanation:

From the question we are told that

The sample standard deviation is $s = 1.5$

The mean difference of the two groups is $\=x _ 1 - \=x_2 = 1$

The standard error is $SE = \frac{ \= x_1 - \= x_2}{4}$

=> $SE = \frac{1}{4}$

Let assume that the confidence level is 95% hence the level of significance is

$\alpha = (100-95)\%$

=> $\alpha = 0.05$

So the critical value of $\frac{\alpha }{2}$ obtained from the normal distribution table is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the margin of error is mathematically evaluated as

$E = Z_{\frac{\alpha }{2} } * SE$

$E = 1.96 * \frac{1}{4}$

$E = 0.49$

Generally the sample size is mathematically represented as

$n =[ \frac{Z_{\frac{\alpha }{2} * s^2}}{E}]^2$

=> $n = [\frac{1.96 * 1.5}{0.49} ]^2$

=> $n = 36$

6 0

3 years ago

HELP ME PLZ I BEG YOU

Dmitry [639]

Answer:

Option H

Step-by-step explanation:

<u>Step 1: Determine which option is correct</u>

Option F: The mode/most common number in Store 1 is 2 which the mode of Store 2 is 1. So... the first option is not correct.

Option G: The range for both of the data sets are 6. So... the second option is not correct.

Option H: The mean/average of Store 1 is 2.9 which the mean/average for Store 2 is 2. So... this option is correct because store 1 does have a higher mean than store 2.

Answer: Option H

6 0

3 years ago