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4 years ago

Can you guys help me with Unit 3 mixed review???¿

Mathematics

1 answer:

mafiozo [28]4 years ago

3 0

7.) $67; multiply 335 by .2 to get 20%
8.) 7.5 glasses; divide 4.5 by 0.6 to get the total
9.) 22, 8, 7, 2, -11

hope this helped!

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kodGreya [7K]

Answer:

the answer is D) 5cm

Step-by-step explanation:

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3 years ago

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This is Simple Interest Ration and percent 7 grade please help

Scrat [10]

The total to be paid is 909.5.
You must do 7% of 850 which is 59.5 and add it to 850 which is 909.5

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3 years ago

Can someone please help me with this. whoever answers first will be the brainleyist

pav-90 [236]

Answer:

Step-by-step explanation:

6(5+x) = 30 + 6x

1. Distribute the 6 to both the 5 and the x.

7x5x3 = 105

1. Just multiply them together.

28 - 3(2+4)/9 = 26

1. PEMDAS

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3 years ago

A book shows an enlarged photo of a carpenter bee. A carpenter bee is about 6×10^-3 m long. The photo is 13.5 cm long. About how

Novay_Z [31]

A ratio compares values. A ratio says how much of one thing there is compared to another thing. We do as follows:

length of photo/ length of a carpenter bee = ratio of the two
13.5 / 6x10^-3 = 2250

Therefore, the photo is 2250 longer than the carpenter bee.

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4 years ago

Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. Thi

Mariana [72]

Answer:

a. Mean: 9.5.

Standard deviation: 2.18.

b. The critical value for signficantly low girl births is 5.14.

The critical value for signficantly high girl births is 13.86.

Step-by-step explanation:

a) If we take a sample of 19 births, all with individual probability of 0.5, we have a random binomial variable with n=19 and p=0.5.

This random variable will have mean and standard deviation calculated as:

$\mu=n\cdot p=19\cdot0.5=9.5\\\\\sigma=\sqrt{np(1-p)}=\sqrt{19\cdot0.5\cdpot0.5}=\sqrt{4.75}=2.18$

b) Range rule of thumb: The standard deviation is approximately a quarter of the range, difference between the maximum and minimum value.

The range rule of thumb tells us that the expected minimum and maximum value are 2 standards deviation below or above, respectively, from the mean.

Then, the extreme expected values are:

$Min=\mu-2\sigma=9.5-2\cdot2.18=9.5-4.36=5.14\\\\Max=\mu+2\sigma=9.5+2\cdot2.18=9.5+4.36=13.86$

The critical value for signficantly low girl births is 5.14.

The critical value for signficantly high girl births is 13.86.

6 0

3 years ago