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4 years ago

Greatest common factor of 7x3a+7xa2

1 answer:

4 0

$7x^3a=\boxed{7}\cdot\boxed{x}\cdot x\cdot x\cdot\boxed{a}\\\\7xa^2=\boxed{7}\cdot\boxed{x}\cdot\boxed{a}\cdot a\\\\7x^3a+7xa^2=\boxed{7}\cdot\boxed{x}\cdot\boxed{a}\cdot x\cdot x+\boxed{7}\cdot\boxed{x}\cdot\boxed{a}\cdot a\\\\=\boxed{7}\cdot\boxed{x}\cdot\boxed{a}(x\cdot x+a)=7xa(x^2+a)$

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Last year, 20,820 people attended a kite festival. This year, 19779 people attended it. If attendance continues to decrease by t

ICE Princess25 [194]

Well you start by dividing 19779 by 20820 to see the percent of people compared to last year (it being 95%). Then you take 19,779 and multiply it by the same percentage, or 0.95. That means that there should be 18790 (it's technically 18790.1 but since that's people you round to the nearest whole number).

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3 years ago

The coefficient of the ab term is

Jlenok [28]

Answer:

A coefficient is an integer that is written along with a variable or it is multiplied by the variable. For example, in the term 2x, 2 is the co-efficient.

Those variables which do not carry any number along with them, have a coefficient 1. For example, the term y has coefficient 1.

Step-by-step explanation:

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3 years ago

Penelope drove 27 kilometers. Which expression finds the distance she drove in centimeters? Use the metric table to help answer

vovikov84 [41]

Answer:

Step-by-step explanation:

1km=1000 m

1 m=100 cm

1 km=1000×100=100000 cm

27 km=100000×27=2,7 00,000 cms

4 0

3 years ago

Read 2 more answers

Cassie can drive 165 miles in 3 hour's. if she is driving at a constant speed, how many miles per hour is she driving

Westkost [7]

Answer:

55mph

Step-by-step explanation:

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3 years ago

Read 2 more answers

Of 585 samples of seafood purchased from various kinds of food stores in different regions of a country and genetically compared

Dafna1 [17]

Answer:

a) The 99% confidence interval is from 14.8% to 23.2%.

b) The confidence interval tells us that the true proportion of mislabeled is within 14.8% and 23.2%, with a 99% confidence. In other words, if we take samples of the same size, 99% of the samples will have a proportion within 0.148 and 0.232.

c) The confidence interval calculation take into account the sample size, so the width (or precision) of the interval depends on the sample size.

The only criticism that could be analyzed is to see if the sample is representative of the population.

Step-by-step explanation:

a) We have to calculate a 99% confidence interval for the proportion.

The sample proportion is p=0.19.

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.19*0.81}{585}}\\\\\\ \sigma_p=\sqrt{0.000263}=0.016$

The critical z-value for a 99% confidence interval is z=2.576.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_p=2.576 \cdot 0.02=0.042$

Then, the lower and upper bounds of the confidence interval are:

$LL=p-z \cdot \sigma_p = 0.19-0.042=0.148\\\\UL=p+z \cdot \sigma_p = 0.19+0.042=0.232$

The 99% confidence interval for the population proportion is (0.148, 0.232).

5 0

3 years ago