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3 years ago

Simplify √ 20 x 8 y 9 to the form a √ b .

Mathematics

1 answer:

Contact [7]3 years ago

6 0

Answer:

Juanita dissolves 46 g of MgBr2 (molar mass: 184.11 g/mol) in 0.5 kg of distilled water. What is the molality of the solution?

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Armelia wants to paint three walls in her family room, wwo walls are 26 feet long by 9 feet wide. The other wall is 18 feet Hong

taurus [48]

Answer: Wall 1 & 2 : 26 ft by 9 ft

Wall 3 : 18 ft by 9 ft

Area 1 : 26 ft x 9 ft = 234 ft²

Area 2 : 26 ft x 9 ft = 234 ft²

Area 3 : 18 ft x 9 ft = 162 ft²

Total Area : 234 ft² + 234 ft² + 162 ft² = 630 ft²

1 Gallon = 250 ft²

630 ft² ÷ 250 ft² per gallon = 2.52 gallons

7 0

3 years ago

How many real roots would f(x)=<br> x^3+2x^2+2x-5 have

goldfiish [28.3K]

Answer:

One real root

Step-by-step explanation:

By the fundamental theorem of algebra, an nth degree polynomial has n-possible real roots.

If there are complex roots, then the the complex roots come in pairs.

Therefore the number of possible real roots of $f(x)=x^3+2x^2+2x-5$ are 3 real roots with no complex pairs or 1 real root with a complex pair.

By Descartes rule of signs, there is only one change of sign in the polynomial (+ to -).

Hence there is only one positive real root.

$f(-x)=-x^3+2x^2-2x-5$

There is change is sign two times but we can not have even number of real roots for this polynomial

Therefore there is only real root.

7 0

4 years ago

How do I complete this formal check?

natima [27]

Answer:

Step-by-step explanation:

The first two steps are for the purpose of eliminating fractions. Doing so results in 4(2x - 5) = 9(x - 2), which is to be solved for x.

Perform the indicated multiplication, obtaining:

8x - 20 = 9x - 18.

Then combine like terms: -2 = x, or

x = -2.

To complete the formal check, substitute -2 for x in the first equation. This results in:

(1/3)(-4 - 5) = (3/4)(-2 -2), or

-3 = -3

... which is obviously true.

8 0

4 years ago

In a board game, you must roll two 6-sided number cubes. You can only start the game if you roll a 3 on at least one of the numb

Kamila [148]

Answer:

Is this a project?

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

1. A baseball player hits a baseball into the air with an initial vertical velocity of 72 feet per second from a height of 3 fee

DiKsa [7]

Answer:

You actually do not ask anything here, so i will find the equation for the height and i will use it to find something useful, like the maximum height of the baseball.

For any object in a vertical motion, the only force acting on it is the gravitational force, so the acceleration of the object will be equal to g.

a(t) = -g

where the minus sign is because the gravitational acceleration pulls down.

For the velocity we can integrate over time, and get:

v(t) = -g*t + v0

Where v0 is the initial velocity, in this case v0 = 72 ft/s

v(t) = -g*t + 72ft/s

with this equation we can find the time in wich the height is maximum, we need to find the time where the velocity is 0.

-g*t + 72 = 0

t = 72/g

for the height we can integrate over time again:

h(t) = (-g/2)*t^2 + 72ft/s*t + h0

where h0 is the initial height, in this case h0 = 3ft

here we can also replace the value of g = 32ft/s^2

h(t) = (-16ft/s^2)*t^2 + 72ft/s*t + 3ft

Now we can evaluate this in the time that we previously find, t = 72/g = 72/32 = 2.25s

h(2.25s) = -16*2.25^2 + 72*2.25 + 3 = 85.08 feet

8 0

4 years ago