3 years ago

Solve 2/3 divided by 4/5 a.6/15 b.6/8 c.8/15 d.5/6

Mathematics

2 answers:

Bumek [7]3 years ago

6 0

Answer:

d.5/6

Step-by-step explanation:

2/3÷4/5

2/3×5/4

5/6

vladimir1956 [14]3 years ago

6 0

Answer:

2/3÷ 4/5 is 5/6

Step-by-step explanation:

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Use the formula to evaluate the series 1/4 + 1/9 + 1/27 + 1/81.

Dmitriy789 [7]

Is the first term supposed to be 1/4, or did you actually mean 1/3?

I'll assume the latter. Write

$S=\dfrac13+\dfrac19+\dfrac1{27}+\dfrac1{81}$
$S=\dfrac13+\dfrac1{3^2}+\dfrac1{3^3}+\dfrac1{3^4}$
$\dfrac13S=\dfrac1{3^2}+\dfrac1{3^3}+\dfrac1{3^4}+\dfrac1{3^5}$
$\implies S-\dfrac13S=\dfrac13-\dfrac1{3^5}$
$\dfrac23S=\dfrac13\left(1-\dfrac1{3^4}\right)$
$S=\dfrac12\left(1-\dfrac1{81}\right)$
$S=\dfrac{40}{81}$

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3 years ago

A rectangular garden is 80 feet long and 50 feet wide. It has a walkway along its diagonal. How long is the walkway? 62.4 feet 9

viktelen [127]

94 feet. 50^2 + 80^2 = x^2

8 0

3 years ago

10 points 8' 5" − 3' 10"

crimeas [40]

Answer:

- 4 cot ( - 45 )

cos ( 390 )

sin ( 330 )

8 0

3 years ago

how do you solve this problem to find the measure of the angle indicated in bold? thank you pls answer!

Mnenie [13.5K]

Answer: 85 degrees

Step-by-step explanation: 20x+5+24x-1=180

44x+4=180

-4 -4

44x=176

division property of equality x=4

20(4)+5=

80+5= 85 degrees

5 0

3 years ago

Prove the following relations: <br>1) (1 - cos²A) (1 + tan²A) = tan²A

liberstina [14]

Step-by-step explanation:

(1 - cos²A) (1 + tan²A) = tan²A

(sin²A)(sec²A) = tan²A

(sin²A)(1/cos²A) = tan²A

(sin²A)/(cos²A) = tan²A

tan²A = tan²A → <u>Proved</u>

4 0

3 years ago

Read 2 more answers