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3 years ago

PLS HELP I DONT UNDERSTAND :( WILL GIVE BRAINLIEST !!!

Mathematics

2 answers:

vodomira [7]3 years ago

5 0

the answer is c

i already done it

Ksju [112]3 years ago

5 0

Answer:

1/3 would be your answer

Step-by-step explanation:

anyway have a great day

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Help needed ASAP will give you BRAINLIEST and 5 stars

ASHA 777 [7]

Answer

Seasons.

Step-by-step explanation:

When the earth revolves around the sun it moves to different spots near the sun. This causes weather to change and the seasons.

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3 years ago

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Prove that lines 3x-4y=12 and 3y=12-4x are perpendicular.

Svetllana [295]

Answer:

see explanation

Step-by-step explanation:

If 2 lines are perpendicular then the product of their slopes equals - 1

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Consider the given equations

3x - 4y = 12 ( subtract 3x from both sides )

- 4y = - 3x + 12 ( divide terms by - 4 )

y = $\frac{3}{4}$ x - 3 ← in slope- intercept form

with slope m = $\frac{3}{4}$

3y = 12 - 4x = - 4x + 12 ( divide terms by 3 )

y = - $\frac{4}{3}$ x + 4 ← in slope- intercept form

with slope m = - $\frac{4}{3}$

Then

$\frac{3}{4}$ × - $\frac{4}{3}$ = - 1

Since the product of their slopes = - 1 then the lines are perpendicular

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2 years ago

16. Devon answered 23 out of 25 problems on a math test correctly. What percent of the problems did Devon answer correctly?

timofeeve [1]

Answer:

92%

Step-by-step explanation:

100/25= 4

4 x 23 = 92

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3 years ago

What is the product?( square root 3x+ square root 5) (square root 15x+ 2 square root 30)

hichkok12 [17]

$(\sqrt{3x}+\sqrt5)\cdot(\sqrt{15x}+2\sqrt{30})\\\\=(\sqrt{3x})(\sqrt{15x})+(\sqrt{3x})(2\sqrt{30})+(\sqrt5)(\sqrt{15x})+(\sqrt5)(2\sqrt{30})\\\\=\sqrt{(3x)(15x)}+2\sqrt{(3x)(30)}+\sqrt{(5)(15x)}+2\sqrt{(5)(30)}\\\\=\sqrt{45x^2}+2\sqrt{90x}+\sqrt{75x}+2\sqrt{150}\\\\=\sqrt{9x^2\cdot5}+2\sqrt{9\cdot10x}+\sqrt{25\cdot3x}+2\sqrt{25\cdot6}\\\\=\sqrt{9x^2}\cdot\sqrt5+2\sqrt9\cdot\sqrt{10x}+\sqrt{25}\cdot\sqrt{3x}+2\sqrt{25}\cdot\sqrt6$
$=3x\sqrt5+2\cdot3\sqrt{10x}+5\sqrt{3x}+2\cdot5\sqrt6\\\\=3x\sqrt5+6\sqrt{10}+5\sqrt{3x}+10\sqrt6$

3 0

3 years ago

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A hiking trail is 5,000 meters long. what is the length in kilometers?

Oxana [17]

There are 5 kilometers

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3 years ago