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2 years ago

Find the value of 2x+8y when X= -5 and y=6

Mathematics

1 answer:

Y_Kistochka [10]2 years ago

3 0

Answer:

Step-by-step explanation:

Substitute the x in the expression with a -5 and substitute the y in the expression with a 6

2(-5)+8(6)

-10+40

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Look at the formula for the area of a circle below. . . A = 3.14(pi)r2 . . Which of the following equations can be used to solve

zaharov [31]

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3 years ago

What is 90times345 need it now

Ivanshal [37]

90*345=
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3 years ago

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A spherical balloon is inflated so that its volume is increasing at the rate of 3 ft3/min. How fast is the diameter of the ballo

beks73 [17]

When an spherical balloon volume is increasing at the rate of $3ft^3/min$ then the diameter of the balloon is increasing $\frac{3}{2\pi }ft /min$

How can we find the rate of change of balloon's diameter ?

The volume of a spherical balloon is $v=\frac{4}{3} \pi r^3$

In form of diameter we can write as

$v=\frac{4}{3} \pi (\frac{D}{2} )^3\\=\frac{1}{6} \pi D^3$

Now we will differentiate both sides wrt to $t$ we get

$\frac{dv}{dt} =\frac{1}{6} \pi 3D^2 \frac{dD}{dt} \\\frac{dD}{dt} =\frac{2}{\pi D^2} \frac{dv}{dt} \\\\when r=1\\D=2ft$

Given in the question $\frac{dv}{dt} =3ft^3/min$

thus when we substitute the values we get

$\frac{dD}{dt} =\frac{2}{\pi *2^2} (3)\\\frac{dD}{dt}=\frac{3}{2\pi } ft/min$

Learn more about the differentiation here:

brainly.com/question/28046488

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2 years ago

572 cars were parked in a parking garage. The same number of cars was parked on each floor. If there were 4 floors, how many car

tatuchka [14]

Answer:

143 cars on each floor

Step-by-step explanation:

572 / 4 = 143

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2 years ago

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Solve the system by the elimination method. Check your work. <br> x - 3y = 0<br> 3y - 6 = 2x

Leto [7]

X - 3y=0
3y - 6 =2x
__________
x - 3y=0 ........(1)
-2x + 3y=6 ........(2)
__________
-x = 6 ==》x = -6 .........(3) subst. in (2)

-2 (-6) + 3y = 6 ==》3y= -6 ==》y = -2

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3 years ago

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Find the value of 2x+8y when X= -5 and y=6​

Find the value of 2x+8y when X= -5 and y=6