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svetlana [45]
3 years ago
9

Using the rules for significant figures, what do you get when you add 24.545 and 307.3?

Mathematics
2 answers:
otez555 [7]3 years ago
6 0
Use long addition to evaluate:
331.845

Black_prince [1.1K]3 years ago
5 0
307.3 + 24.545 = 331.845

331.845 is your answer

hope this helps
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What is an equation of the line that passes through the points (0, 3) and (5, -3)?
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Answer <u>(assuming it can be in slope-intercept form)</u>:

y = -\frac{6}{5} x+3  

Step-by-step explanation:

1) First, use the slope formula m =\frac{y_2-y_1}{x_2-x_1} to find the slope of the line. Substitute the x and y values of the given points into the formula and solve:

m =\frac{(-3)-(3)}{(5)-(0)} \\m = \frac{-3-3}{5-0}\\m = \frac{-6}{5}

So, the slope is -\frac{6}{5}.  

2) Now, use the slope-intercept formula y = mx + b to write the equation of the line in slope-intercept form. All you need to do is substitute real values for the m and b in the formula.

Since m represents the slope, substitute -\frac{6}{5} for it. Since b represents the y-intercept, substitute 3 for it. (Remember, the y-intercept is the point at which the line hits the y-axis. All points on the y-axis have an x-value of 0. Notice how the given point (0,3) has an x-value, too, so it must be the line's y-intercept.) This gives the following equation and answer:

y = -\frac{6}{5} x+3

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How many 2/5 ounce doses are in 4 ounces of medicine?
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There are 10 doses.  4x5=20/2=10
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63.2

Step-by-step explanation:

90+26.6=116.8

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A researcher interviews shoppers at a local mall. The mall was chosen because it was close to the researcher's house.
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When 200 gallons of oil were removed from a tank, the volume of oil left in the tank was 3/7 of the tank's capacity. what was th
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Answer:

Step-by-step explanation:

"When 200 gallons of oil were removed from a tank" algebraically looks like this:

V - 200.

"...the volume of oil left in the tank was 3/7 of the tank's capacity" algebraically looks like this:

3/7(V)

Therefore, the equation is

V - 200 = 3/7(V)

Begin by multiplying both sides by 7:

7(V - 200) = 3V and

7V - 1400 = 3V so

-1400 = -4V so

V = 350 gallons

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For the other part of the problem, we set up the equation almost the same, except the 3/7 is a 1/2:

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Multiplying both sides by 2 gives you

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2V - 400 = V so

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