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NeX [460]
3 years ago
9

Mark each! Of the following equations as true or false. Explain or showing your reasoning!

Mathematics
1 answer:
Airida [17]3 years ago
8 0

Answer:

False

True

True

Step-by-step explanation:

Multiplying add exponents

Divide subtract exponents

Exponent multiply exponents

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A palm tree casts a shadow that is 28 feet long. A 6-foot sign casts a shadow 8 feet long.
s2008m [1.1K]

Answer: The height of the palm tree is 21 feet.

Step-by-step explanation:

We can use a ratio to solve this:

Actual height to shadow for both objects. The fraction equivalents must be equal.

6/8 = x/28 . Cross multiply

6(28) = 8x

168 = 8x   Divide both sides by 8  (8's "cancel" on the right)

168/8 =8x/8

21 = x . This gives us the tree's height as 21 feet.

<em>Another way to solve this is to use the ratios, but simplify the first fraction</em>

<em>6/8 = 3/4</em>

<em>Then multiply the length of the shadow by 3/4</em>

<em>3/4 × 28 = height</em>

<em>28÷4 = 7    7 × 3 = 21</em>

<em>21  feet= the height of the palm tree.</em>

3 0
3 years ago
Simon can see two lights, light A and light B.
xz_007 [3.2K]

Answer:

2 Times

Step-by-step explanation:

Simon can see two lights A and B

  • Light A flashes every 15 seconds.
  • Light B flashes every 18 seconds.

First, we determine the next time both lights will flash together.

This is done by finding the Least Common Multiple of 15 and 18.

15=3X5

18=2X3^2

LCM of 15 and 18=2X3^2X5=90

This means that lights A and B will first flash together after 90 seconds.

Now, 240/90=2.\overline{6} seconds

Therefore, the number of times more both light will flash together in the next 4 Minutes= 2 Times

3 0
3 years ago
Urgent NEED DONE NOW PLEASE
zheka24 [161]
The answer to this question is a.
4 0
3 years ago
Need help again asap giving brainliest
Liono4ka [1.6K]

Answer:

u forgot to put the question

4 0
3 years ago
Which expression represents -3/4 and -0.2 on a number line
olga_2 [115]

Step-by-step explanation:

Plot -3/4 in between -1/2 and -1

Plot -0.2 in between -0.3 and -0.1 or between -2/5 and 0.

<h3><u><em>Hope this helps!!! </em></u></h3><h3><u><em>Please mark this as brainliest!!! </em></u></h3><h3><u><em>Thank You!!! </em></u></h3><h3><u><em>:)</em></u></h3>
6 0
3 years ago
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