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4 years ago

9

An algebra question i really need help with this like ASAP

1 answer:

AVprozaik [17]4 years ago

6 0

"the candle is 17 inches tall after 3 hours" then it says " after 5 hours it is 15 inches tall"

-assuming that they mean that after 2 additional hours (from 3-5), the candle is now 2 inches shorter than before, a unit of decreasing value can be determined in this case the candle is "shortening" at a rate of 1 inch/per hour. If we write this in equation form it looks like this I think: h = h-t ...... right ? so then: h = 20 - 8 , h = 12 inches after 8 hours.

20 inches is the original height of the candle before any was burnt that I calculated using the same equation - What do you think of my answer.

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FIRST TO DO THIS GETS 100 POINTS

Pavel [41]

Answer:

first one: x greater than or equal to 5,000

second one: 35 is greater than or equal to x

Step-by-step explanation:

this is what I would put

have a gr8 day boo<3

8 0

3 years ago

20.Solve the triangle: b = 100, c = 100, y = 70". If it is not possible, say so.This triangle is not solvable.Q = 40", a = 68.4,

saveliy_v [14]

Answer:

$\begin{gathered} \alpha=\text{ 40\degree} \\ \beta=\text{ 70\degree} \\ a=68.4 \end{gathered}$

Step-by-step explanation:

By the theorem of intern angles of a triangle, we know that the sum of all intern angles of a triangle must be 180°, therefore:

*There are two equal angles because there are two equal sides

$\begin{gathered} \alpha=180-70-70 \\ \alpha=\text{ 40\degree} \\ \beta=\text{ 70\degree} \end{gathered}$

Now, applying the law of sines, we can find side a. The law of sines is represented by the following equation:

$\frac{a}{\sin \alpha}=\frac{b}{\sin \beta}$

Hence, if b=100, alpha=40° and betha=70°, solve for a:

$\begin{gathered} \frac{a}{\sin (40)}=\frac{100}{\sin (70)} \\ a=\frac{100\cdot\sin (40)}{\sin (70)} \\ a=\text{ 68.4} \end{gathered}$

7 0

1 year ago

Which expression is equivalent to 45 + 30

OLga [1]

Answer:

5(9+6)

5×9=45

5×6=30

I hope this is good enough:

8 0

3 years ago

Find the slope of the line that passes through the pair of points. <br><br> (1.8, –3.4), (6.8, –8.4)

elixir [45]

Answer:

-1

Step-by-step explanation:

If a straight line passes through the known points (x1, y1) and (x2, y2), the its slope is given by $m = \frac{y1-y2}{x1-x2}$

Now, in our case the straight line passes through the points (1.8, - 3.4) and (6.8, - 8.4).

Therefore, the slope of the required straight line will be $m = \frac{-3.4-(-8.4)}{1.8-6.8}= -1$ ( Answer )

3 0

4 years ago

Given that <2=<6.

Misha Larkins [42]

Answer: B . Converse of the alternate exterior angle theorem.

5 0

4 years ago