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3 years ago

Add the expressions. (⎯⎯)+(⎯+)

Mathematics

2 answers:

maxonik [38]3 years ago

5 0

Answer:

i think +- but im not sure

Step-by-step explanation:

murzikaleks [220]3 years ago

4 0

Uh confusion is here.

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A and b together can do a piece of work in 8 days. If a alone can do the same work in 12 days, then b alone can do the same work

Nostrana [21]

B can finish the job alone in 24 days.

In work-rate problems, a certain person can complete a fraction of the job for a specific timeframe. As stated in the problem, A and B can finish the job by working together for 8 days. It must be noted that the fraction of the job they can finish individually per day is additive.

$\frac{1}{A} + \frac{1}{B} = \frac{1}{8}$

A can complete the work in 12 days and finish 1/12 fraction of a job per day. This can be substituted directly to the equation to solve for the time B needed to finish the work.

$\frac{1}{12} + \frac{1}{B} = \frac{1}{8}$

$\frac{1}{B}= \frac{1}{8}- \frac{1}{12}$

$\frac{1}{B} = \frac{1}{24}$

This means that B can do 1/24 fraction of the job per day and can completely finish the job in 24 days.

For more rate work-rate problems, please refer to the link brainly.com/question/14464103.

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6 0

2 years ago

Ellus<br> Find the measure of 41.<br> {<br> 839<br> 61<br> {<br> « 1 = [?]

devlian [24]

Answer:

180 - 83 = 97°

Step-by-step explanation:

Supplementary angles and Corresponding angles

3 0

3 years ago

Read 2 more answers

mrs jacobson asks each group of students to write an expression equivalent to the model shown. which group is incorrect expressi

madreJ [45]

Where is the model. To answer I need the model.

8 0

4 years ago

When filling your gas tank, if you pay c dollars for g gallons of gas, you have the following table.

Ksenya-84 [330]

Option D statement "A 12-gallon tank would cost $47.40 to fill completely" is true.

<h3>What is a domain?</h3>

The whole of the independent variable's possible values makes up the domain of a function.

For the given data we need to find which of the given statements are true.

From option A:

The domain is {4, 8, 11, 15}.

The domain is all possible x values so this would be 0 to infinity as you can pay for more gallons not just to that certain set of numbers.

Therefore, option A is False.

From option B:

An 11-gallon tank would cost $44.00 to fill completely.

From the given table we can see that 11-gallon tank costs $43.45.

Therefore, option B is False.

From option C:

A 9.1-gallon fill-up would cost $35.49.

To find 9.1 gallons we need to find the cost of 1-gallon.

That is, 15.80/4 = $3.95 (Given in the table)

Now the cost of 9.1 gallon tank is $3.95 x 9.1 = $35.95 not $35.49

Therefore, option C is False.

From option D:

A 12-gallon tank would cost $47.40 to fill completely.

We found that 1 gallon is $3.95.

$3.95 x 12 = $47.40

Therefore, option D is True.

Hence, from the given statements option D is True.

To learn more about data visit:

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6 0

2 years ago

The weights of newborn baby boys born at a local hospital are believed to have a normal distribution with a mean weight of 4016

hodyreva [135]

Answer:

Required Probability = 0.97062

Step-by-step explanation:

We are given that the weights of newborn baby boys born at a local hospital are believed to have a normal distribution with a mean weight of 4016 grams and a standard deviation of 532 grams.

Let X = weight of the newborn baby, so X ~ N( $\mu=4016 , \sigma^{2} = 532^{2}$ )

The standard normal z distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

Now, probability that the weight will be less than 5026 grams = P(X < 5026)

P(X < 5026) = P( $\frac{X-\mu}{\sigma}$ < $\frac{5026-4016}{532}$ ) = P(Z < 1.89) = 0.97062

Therefore, the probability that the weight will be less than 5026 grams is 0.97062 .

5 0

3 years ago