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Maksim231197 [3]
3 years ago
11

Right answer gets brainlist

Mathematics
1 answer:
elena55 [62]3 years ago
4 0

Answer:

546

Step-by-step explanation:

Surface Area = 2(lw + lh + wh)

plug in 21 10.5 and 2.5

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When solving this equation: -16 + x = -15 we start with adding 16 to both sides. Why do we use addition?​
Ierofanga [76]

Answer:

So you can cancel out the 16. See, the -16 is negative, and if we add +16 to it, then it cancels out and is 0. That way, you have x=1.

Step-by-step explanation:

-16x+x=-15

+16x      +16

   0+x=1

       x=1

6 0
3 years ago
Determine whether each first-order differential equation is separable, linear, both, or neither. 1. ????y????x+????xy=x2y2 2. y+
Mkey [24]

Answer:

a) Linear

b) Linear

c) Linear

d) Neither

See explanation below.

Step-by-step explanation:

a) \frac{dy}{dx} +e^x y = x^2 y^2

For this case the differential equation have the following general form:

y' +p(x) y = q(x) y^n

Where p(x) =e^x and q(x) = x^2 and since n>1 we can see that is a linear differential equation.

b) y + sin x = x^3 y'

We can rewrite the following equation on this way:

y' -\frac{1}{x^3} y= \frac{sin (x)}{x^3}

For this case the differential equation have the following general form:

y' +p(x) y = q(x) y^n

Where p(x) =-\frac{1}{x^3} and q(x) = \frac{sin(x)}{x^3} and since n=0 we can see that is a linear differential equation.

c) ln x -x^2 y =xy'

For this case we can write the differential equation on this way:

y' +xy = \frac{ln(x)}{x}

For this case the differential equation have the following general form:

y' +p(x) y = q(x) y^n

Where p(x) =x and q(x) = \frac{ln(x)}{x} and since n=0 we can see that is a linear differential equation.

d) \frac{dy}{dx} + cos y = tan x

For this case we can't express the differential equation in terms:

y' +p(x) y = q(x) y^n

So the is not linear, and since we can separate the variables in order to integrate is not separable. So then the answer for this one is neither.

4 0
3 years ago
Equation C: y = 6x + 9
Elden [556K]

Answer:

no solution

Step-by-step explanation:

Equating the right sides of both equations, that is

6x + 9 = 6x + 2 ( subtract 9 from both sides )

6x = 6x - 7 ( subtract 6x from both sides )

0 = - 7 ← not possible

This indicates there is no solution to the system of equations

8 0
3 years ago
There is one integer for which there does not exist another integer with the same absolute value, What is that integer?
kotykmax [81]
Zero, it is not negative or positive.
7 0
4 years ago
Read 2 more answers
What is the area of a rectangle with width 2/5 inches and length 3/5 inches? Give brainl<br><br>est
Mama L [17]
The area of a rectangle is length x width.

2/5 x 3/5 = 6/25

The area of the rectangle is 6/25.
6 0
3 years ago
Read 2 more answers
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