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3 years ago

4x + 3y=-8 -8x + y=-12

Mathematics

2 answers:

Tju [1.3M]3 years ago

6 0

Actually the correct answer is x:1 and y:-4 you can check this by substitute the x and y into the equayion

emmasim [6.3K]3 years ago

5 0

X is 1 while Y is 4/3

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Y varies directly as x and inversely as the square of z. y equals 10 when x equals 36 and z equals 6. Find y when x equals 2 and

Ilia_Sergeevich [38]

Answer:

y = 20

Step-by-step explanation:

$y = \frac{kz}{x} \\ 10 = \frac{6k}{36} \\ \frac{6k}{6} = \frac{360}{6} \\ k= 60 \\ y = \frac{4(60)}{2} \\ y = \frac{240}{2} \\ y = 120$

If this is right, then please make it the brainliest.

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3 years ago

Nora is twice as old as Raj and half as old as Ethan. In 22 years' time. Ethan will be twice as old as Raj. Find Nora's current

Studentka2010 [4]

Answer:

44 because 22 multiplied by 2 is 44

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2 years ago

The complement of the markup rate based on selling price is the percent of _____ based on selling price.

mezya [45]

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3 years ago

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on a recent hike through riverbend park antoinette traveled 2/3 mile in 1/3 hour . Which unit rate describes antoinettes speed i

My name is Ann [436]

Answer:

Her speed is of 2 miles per hour.

Step-by-step explanation:

Velocity:

The velocity is given by the following formula:

$v = \frac{d}{t}$

In which v is the velocity, d is the distance and t is the time.

2/3 mile in 1/3 hour .

This means that $d = \frac{2}{3}, t = \frac{1}{3}$

Which unit rate describes antoinettes speed in miles per hour?

This is v. So

$v = \frac{d}{t} = \frac{\frac{2}{3}}{\frac{1}{3}} = \frac{2}{3}*\frac{3}{1} = 2$

Her speed is of 2 miles per hour.

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3 years ago

If a tank holds 5000 gallons of water, which drains from the bottom of the tank in 40 minutes, then Torricelli's Law gives the v

pochemuha

Answer:

V'(t) = $-250(1 - \frac{1}{40}t)$

If we know the time, we can plug in the value for "t" in the above derivative and find how much water drained for the given point of t.

Step-by-step explanation:

Given:

V = $5000(1 - \frac{1}{40}t )^2$ , where 0≤t≤40.

Here we have to find the derivative with respect to "t"

We have to use the chain rule to find the derivative.

V'(t) = $2(5000)(1 - \frac{1}{40} t)d/dt (1 - \frac{1}{40}t )$

V'(t) = $2(5000)(1 - \frac{1}{40} t)(-\frac{1}{40} )$

When we simplify the above, we get

V'(t) = $-250(1 - \frac{1}{40}t)$

If we know the time, we can plug in the value for "t" and find how much water drained for the given point of t.

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4 years ago