2 years ago

You watch x minutes of television on Monday, the same amount on Wednesday, and 30 minutes on Friday.

Mathematics

1 answer:

never [62]2 years ago

8 0

Does this have a total amount to it?

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The sum of two numbers is 26. One number is<br> 9 more than the other one. Find the numbers.

rusak2 [61]

Answer:

Step-by-step explanation:

x+y=26

x-y=9

by process of elemination

2x=35

x=17.5

17.5+y=26

y=8.5

3 0

2 years ago

32 is 25% of x. Hurry please

kondor19780726 [428]

The answer is 128

hope that helps!

3 0

2 years ago

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List the constant(s) in 2ab + 8 + c - 10

natali 33 [55]

Answer:

Constants: 8 and 10

Step-by-step explanation:

4 0

2 years ago

Find the greatest solution for x+y when x^2+y^2 = 7, x^3+y^3=10

damaskus [11]

Answer:

Step-by-step explanation:

set

$f(x,y)=x+y\\$

constrain:

$g(x,y)=x^2+y^2 = 7\\h(x,y)=x^3+y^3=10$

Partial derivatives:

$f_{x}=1\\f_{y} =1 \\g_{x}=2x \\g_{y}=2y\\h_{x}=3x^2 \\h_{y}=3y^2$

Lagrange multiplier:

$grad(f)=a*grad(g)+b*grad(h)\\$

$\left[\begin{array}{ccc}1\\1\end{array}\right]=a\left[\begin{array}{ccc}2x\\2y\end{array}\right]+b\left[\begin{array}{ccc}3x^2\\3y^2\end{array}\right]$

4 equations:

$1=2ax+3bx^2\\1=2ay+3by^2\\x^2+y^2=7\\x^3+y^3=10$

By solving:

$a=4/9\\b=-2/27\\x+y=4$

Second mathod:

Solve for x^2+y^2 = 7, x^3+y^3=10 first:

$x=\frac{1}{2} -\frac{\sqrt{13}}{2} \ or \ y=\frac{1}{2} +\frac{\sqrt{13}}{2} \\x=\frac{1}{2} +\frac{\sqrt{13}}{2} \ or \ y=\frac{1}{2} -\frac{\sqrt{13}}{2} \\x+y=-5\ or\ 1 \or\ 4$

The maximum is 4

6 0

2 years ago

What is the solution to the system of equations shown in the graph?

Helen [10]

Answer:

B) (-2,1)

Step-by-step explanation:

The solution is where the two lines intersect, in this case at (-2,1)

Hope this helps! :)

7 0

2 years ago

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