4 years ago

Four-fifths of a number decreased by eight is four. Find the number.

Mathematics

2 answers:

Norma-Jean [14]4 years ago

8 0

4/5x-8 = 4
4/5x = 12
X = 15

enyata [817]4 years ago

8 0

Answer:

5 tdosbfe

Step-by-step explanation:

kxx d id rwla d

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Montano1993 [528]

Answer: $\text{tan a}= \frac{3\sqrt{91} }{91}$

Step-by-step explanation:

Since, in the triangle abc,

ab = 10√91 unit, bc = 30 unit, ca = 100 unit and m∠b = 90°

⇒ $\text{tan a} = \frac{bc}{ab}$

⇒ $\text{tan a} = \frac{30}{10\sqrt{91}}$

⇒ $\text{tan a} =\frac{3}{\sqrt{91}}$

⇒ $\text{tan a} = \frac{3\times \sqrt{91}}{\sqrt{91}\times \sqrt{91}}$

⇒ $\text{tan a} = \frac{3\sqrt{91}}{91}$

Which is the required value of tan(∠a).

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3. Alexis and her little sister began biking at the same time in the same direction from Grinnell on

AlladinOne [14]

Answer:

They will be 10 miles apart on the 4th hour

Step-by-step explanation:

4hr=60 (15miles)

4hr=48 (12miles)

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This is $21.00 because I asked the smartest person in the world and she said
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Answer:

Step-by-step explanation:

if you divide 2,560 by 640 you get 4.

hope this helps you.

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