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Hitman42 [59]
1 year ago
6

Which choices are in the solution set of the equation below? Check all that

Mathematics
1 answer:
Alecsey [184]1 year ago
7 0
To solve the equation, divide by 4 on both sides to isolate the variable:
4x = 30
4x/4 = 30/4
x = 7.5
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If x^2 + xy = 20 and dx/dt = -4 when x = -5 and y = 1, what is dy/dt
SpyIntel [72]

Answer:

3.2

Step-by-step explanation:

x² + xy = 20

Take the derivative with respect to time:

2x dx/dt + x dy/dt + y dx/dt = 20

(2x + y) dx/dt + x dy/dt = 20

Given x = -5, y = 1, and dx/dt = -4:

(2(-5) + 1) (-4) + (-5) dy/dt = 20

(-10 + 1) (-4) − 5 dy/dt = 20

36 − 5 dy/dt = 20

5 dy/dt = 16

dy/dt = 3.2

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3 years ago
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Hope this helps I guess if not I’m sry

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3 years ago
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harpers house is 30 feet wide and 45 feet long on a scale drawing the house is 4 inches wide and 6 inches long and harpers bedro
Masteriza [31]
Harpers bedroom is 9 feet wide and 12 feet long
8 0
2 years ago
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How can this be solved?
Ad libitum [116K]

Answer:

by multiplying all numbers seperatly by each other and adding those

Step-by-step explanation:

7 0
3 years ago
Find the surface area of the composite figure.
ELEN [110]

Answer:

644cm^2

Step-by-step explanation:

First we'll work out the surface area of the pink figure.

That's the area of the two 5 by 6 rectangles on the top and bottom, plus the area of the two 5 by 20 and two 6 by 20 rectangles on the sides.

However, we note that the purple figure is blocking out a 6 by 12 section on the pink figure, so we'll need to subtract this.

The above works out to 2\times(30+100+120)-72=428 cm^2.

Then we'll work out the surface area of the purple figure.

This will be the area of the two 4 by 6 rectangles at the top and bottom, plus the area of the two 4 by 12 and one 6 by 12 rectangles on the sides. Note that there's only one 6 by 12 rectangle because the other face is joined to the pink figure, so it's blocked out.

That's 2\times(24+48)+72=216cm^2.

So the total surface area is 428+216=644cm^2.

6 0
1 year ago
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