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3 years ago

Express the sum in simplest form. [1/x] + [1/y]

2 answers:

6 0

X/y - y/x
---------------- 
1/y + 1/x 

x ² - y ² 
----------- 
x + y 

( x - y ) ( x + y 
-------------------- 
x + y 

x - y hope this helpd

ra1l [238]3 years ago

3 0

It is x-y hope that helps good luck

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When the discount period started, the price of a chair changed from $220 to $154. By what percent did the price of the chair dec

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Answer:

it changed by -30 percent

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3 years ago

Scale of a model airplane to the actual airplane is 1 inch equals 10 feet. How many times longer the actual plane is than the mo

WINSTONCH [101]

Answer:

120 times

Step-by-step explanation:

If we want to find a qunatity is how many times as other quantity, we have to divide the large one by the small one (remember, same units).

Let's make both into inches.

We have 1 inch [model]

also

10 feet * 12 = 120 inches

Thus, we can say:

120/1 = 120 times

So, Actual Plane is 120 times than model airplane

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3 years ago

1) A projectile is thrown upward so that its distance above the ground after t seconds is

leonid [27]

Answer:

After 22 seconds the projectile reach its maximum height of 4,840 units

Step-by-step explanation:

we have

$h(t)=-10t^{2}+440t$

This is a vertical parabola downward (because the leading coefficient is negative)

The vertex is a maximum

Find out the coordinates of the vertex

Convert the quadratic equation in vertex form

Factor -10

$h(t)=-10(t^{2}-44t)$

Complete the square

$h(t)=-10(t^{2}-44t+22^2)+(10)(22^2)$

$h(t)=-10(t^{2}-44t+22^2)+4,840$

Rewrite as perfect squares

$h(t)=-10(t-22)^{2}+4,840$

The vertex is the point (22,4,840)

therefore

After 22 seconds the projectile reach its maximum height of 4,840 units

4 0

3 years ago

Helpppp big brains am I right??

noname [10]

Answer:

y=3x+4

Step-by-step explanation:

This is the correct answer

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2 years ago

Cuanto es 8/9 x 15/16? porfaAa estoy en prueba

iren [92.7K]

Answer:

=5/6

Step-by-step explanation:

happy to help ya :)

4 0

3 years ago

Read 2 more answers