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3 years ago

Express the number in decimal notation. 5.2 �� 104 a. 5200 b. 208 c. 520,000 d. 52,000

Mathematics

1 answer:

MakcuM [25]3 years ago

4 0

5.2×10^4=5.2×10000=52×1000=52000

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7y ^3 −7x^3 +4−5+6−3x^3 +6x^3 Combine Like Terms

snow_lady [41]

Answer:

-4x^3 + 7y^3 + 5

Step-by-step explanation:

7y^3 - 7x^3 + 4 - 5 + 6 - 3x^3 + 6x^3 Given

7y^3 - 7x^3 - 3x^3 + 6x^3 + 4 - 5 + 6 Rearrange

7y^3 - 4x^3 + 5 Combine the like terms

-4x^3 + 7y^3 + 5 Answer

8 0

3 years ago

The volume of a beack ball is 905 square centimeters. Find the radius of the ball to the nearest whole number.

lubasha [3.4K]

<h3>given:</h3>

$v = 905 \: {cm}^{3}$

the radius of the given ball (sphere).

<h3>solution:</h3>

$r = \sqrt[3]{ \frac{3v}{4\pi} }$

$r = \sqrt[3]{ \frac{3 \times 905}{4\pi} }$

$r = 6 \: cm$

therefore, the radius of the ball is 6 cm.

note: refer to the picture I added on how you can change r as the subject of the formula.

8 0

2 years ago

Read 2 more answers

Which of the following is a perfect square? A. 169 B. 154 C. 279 D. 115

castortr0y [4]

169 = 13²

Answer is A. 169

4 0

2 years ago

Read 2 more answers

PLZ HELP !!!! WILL MARK BRAINLIEST, THIS IS DUE IN 15 MINUTIES !!!ANYONE PLEASEPLZ HELP !!!! WILL MARK BRAINLIEST, THIS IS DUE I

svetlana [45]

J
I am 90% sure, if this is edge then this helps me to, I’m really just filling in the character requirement but it’s j, I think

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2 years ago

Complete the square than convert to vertex form. y=2x^2+8x-9

8_murik_8 [283]

$y=2x^2+8x-9\\D=b^2-4ac\\D=64-4(2)(-9)\\D=64+72 > 0$

There are 2 roots so the only way to complete the square is,

$y=2x^2+8x-9\\y=2[(x^2+4x)]-9\\y=2[(x^2+4x+4)-4]-9\\y=2[(x+2)^2-4]-9\\y=2(x+2)^2-8-9\\y=2(x+2)^2-17$

Just factor 2 out of 2x^2+8x (just ignore the -9) then find the number that will make the terms be able to complete the square.

then complete the square and multiply 2 inside the brackets.

subtraction as you already get the vertex form and know how to complete the square.

Vertex Form: $y=2(x+2)^2-17$

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3 years ago