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4 years ago

On a final exam, each multiple-choice question is worth 4 points and each word problem is worth 8 points. Lorenzo needs

Mathematics

2 answers:

Elena-2011 [213]4 years ago

7 0

Answer:

4x + 8y = 50 or 4x + 8y > 50

Step-by-step explanation:

To find which equation show the exact answer, Becasue he need at least 50 poitns to have a B, so:

4x + 8y must larger or equal to 50

In these choice, some I can't figure out what it means but the correct answer for this is:

4x + 8y = 50 or 4x + 8y > 50

Hope this help you :3

mr_godi [17]4 years ago

6 0

Answer:

4x + 8y ≥ 50

Step-by-step explanation:

Since x represents the multiple choice questions, and each of them is worth 4 points, the total points because of this type of questions is

and y represents the word problems, and each of this is worth 8 point, so the total points because of this type of questions is

Lorenzo needs at leat 50 points: this means 50 points or more, so the sum of the points he gets for each type of question must be equal to 50 points or more.

This is represented by the inequation:

4x + 8y ≥ 50

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Write an equation with two variables that represents a real word situation

KATRIN_1 [288]

Solve for t. d = rt heres a real word question. but im not sure if you can use this exact one :)

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4 years ago

Please Elijah and Aubrey have summer jobs Elijah deposits the same amount of money in his account every week the equation is y =

Anika [276]

Answer:

Part a) $y=125x+23$

Part b) The graph of the equation for Aubrey's balance is parallel to the graph of Elijah's balance

Part c) Parallel graphs mean that their slopes are the same and that they deposited the same amount of $125 per week into their account balance during the summer.

Step-by-step explanation:

The correct question is

Elijah and Aubrey have summer jobs. Elijah deposits the same

amount of money in his account every week. The equation y = 125x + 72 represents his bank balance any given week of the summer. Aubrey also deposits the same amount into her account every week. At the end of the third week she has $398. At the end of the sixth week she has $773.

a. Write an equation to represent Aubrey's bank balance any given week of the summer.

b. Would the graph of the equation for Aubrey's balance be parallel to the graph of Elijah's balance? Explain.

c. What do the parallel graphs mean in terms of the situation?

Part a)

Let

x ----> the number of weeks

y ----> represent bank's balance

we know that

Elijah

$y=125x+72$ -----> equation A

Aubrey

we have the points

(3,398) and (6,773)

Find the slope m

$m=(773-398)/(6-3)$

$m=375/3$

$m=125$

Find the equation of the line in point slope form

$y-y1=m(x-x1)$

we have

$m=125$

$point\ (3,398)$

substitute

$y-398=125(x-3)$ ----> equation in point slope form

Convert to slope intercept form

$y=mx+b$

$y-398=125x-375$

$y=125x-375+398$

$y=125x+23$ ----> Aubrey's bank balance

Part b)

Compare the equations

$y=125x+72$ ----> Elija's bank balance

$y=125x+23$ ----> Aubrey's bank balance

Remember that

If two lines are parallel, then their slopes are equal

In this problem the slopes are equal

$m=125\frac{\$}{week}$

therefore

The graph of the equation for Aubrey's balance is parallel to the graph of Elijah's balance

Part c) Parallel graphs mean that their slopes are the same and that they deposited the same amount of $125 per week into their account balance during the summer.

5 0

3 years ago

Which of the following would be a correct interpretation of a 99% confidence interval such as 4.15.6? Choose the correct answe

Alik [6]

Answer:

A. We are 99% confident that the interval from 4.1 to 5.6 actually does contain the true value of population mean.

Step-by-step explanation:

x% confidence interval:

A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.

In this question:

99% confidence interval means that we are 99% sure that this interval contains the population mean.

Interval between 4.1 and 5.6.

So the correct answer is given by option A.

3 0

3 years ago

The coordinate pairs for triangle ABC are A(1,2), B(4,5), C(2,2). It undergoes a translation of 2 units right and 1 unit 1 up. W

Bumek [7]

Answer:

a (2,4)

Step-by-step explanation:

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4 years ago

Mr. Jones will cut 6 identical loaves of bread into pieces that are 1/4 loaf

r-ruslan [8.4K]

Answer B. 24
Each loaf of bread is divided into 4 slices
And there are 6 loaves of bread
6 x 4 =24
24 pieces

8 0

3 years ago