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2 years ago

6

A mermaid is swimming at sea level when a human comes by. She dives underwater at a rate of 8 meters per second. She continues t

o descend for 20 secconds. What depth is she now?

1 answer:

liubo4ka [24]2 years ago

7 0

You basically just multiply 8 by 20.

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Solve for y.<br><br> –0.8y + 5.49 = –19.86 − 2.3y<br><br> y =

anastassius [24]

Answer:

y = -16.9

Step-by-step explanation:

<u>→Add 0.8y to both sides:</u>

-0.8y + 5.49 = -19.86 - 2.3y

5.49 = -19.86 - 1.5y

<u>→Add 19.86 to both sides:</u>

25.35 = -1.5y

<u>→Divide both sides by -1.5:</u>

-16.9 = y

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3 years ago

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2x + y = 13<br> What y????

hoa [83]

Answer:

2(5) + 3 = 13

Step-by-step explanation:

x=5

y=3

2x+y=13

2(5)+3=13

10 +3 =13

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2 years ago

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Type your answer in the box. You may use numbers, a decimal point (.), and/or a negative sign (-) in your answer. Stella is rent

True [87]

420 blaze it

420 miles

5 0

2 years ago

Pls help me solve this question, also include step by step calculation ya. Thks

sp2606 [1]

$\displaystyle\\Answer:\ x=\sqrt{2}\ \ \ \ \ x=-\sqrt{2}\ \ \ \ \ x=\frac{ln5}{2}$

Step-by-step explanation:

$5x^2-x^2e^{2x}+2e^{2x}=10$

$Let:\ x^2=t \ \ \ \ \ e^{2x}=v\\Hence,\\5t-tv+2v^2=10\\5t-tv+2v^2-10=10-10\\5t-tv-10+2v^2=0\\t(5-v)-2(5-v)=0\\(5-v)(t-2)=0\\5-v=0\\5-v+v=0+v\\5=v\\5=e^{2x}$

<em>Prologarithmize both parts of the equation:</em>

$ln5=lne^{2x}\\ln5=2x*lne\\ln5=2x*1\\ln5=2x\\$

<u><em> Divide both parts of the equation by 2:</em></u>

$\displaystyle\\x=\frac{ln5}{2}$

$t-2=0\\t-2+2=0+2\\t=2\\x^2=2\\x=\sqrt{2} \\x=-\sqrt{2}$

6 0

11 months ago

The value of y varies directly with c. If x = 2, then y = 7. Find the value of x if y = 84.

shtirl [24]

Answer:

x=24

Step-by-step explanation:

y = x*c

x=2, y=7

2*c=7 => c=7/2

x*7/2 = 84

x = 84*2/7

x = 12*2

x = 24

3 0

2 years ago

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