A dolphin was swimming 28 meters below the ocean's surface. It changed its depth to avoid a

1 answer:

6 0

Answer: 7 meters

Step by step explanation:

Now write an equation that represents the situation. You want to find the change in the dolphins depth, so subtract it’s beginning depth from its final depth.

Hope it helps!

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The product of 3 and a number X is 2/3 what is the value of X

ANEK [815]

Answer:

x = 2/9

Step-by-step explanation:

3x = 2/3

3*3x = 2

9x = 2

x = 2/9

Check:

3*2/9 = 2/3

6/9 = 2/3

5 0

3 years ago

If the each side of equalaterial triangle is a cm. what is the area?

Yuri [45]

Step-by-step explanation:

$area \: of \: a \: triangle = \frac{1}{2} \times base \times height \\ \\ base = \frac{a}{2} cm \\ {h}^{2} + {( \frac{a}{2} )}^{2} = {a}^{2} \\ \\ h = \sqrt{ {a}^{2} - \frac{ {a}^{2} }{4} } \\ \\ area \: of \: triangle = \frac{1}{2} \times b \times h \\ = \frac{1}{2} \times \frac{a}{2} \times \sqrt{ {a}^{2} - \frac{ {a}^{2} }{4} } \\ \\ = \frac{a}{4} \times \sqrt{ {a}^{2} - \frac{ {a}^{2} }{4} }$