2 years ago

Simplify . (1/c + 1/h)/(1/(c ^ 2) - 1/(r ^ 2))

Mathematics

1 answer:

omeli [17]2 years ago

3 0

Answer:

(h+c)/ch ÷ (h²+c²)/c²h²

(h+c)/ch × c²h²/(h²+c²)

(h+c)/1 × ch/(h²+c²)

ch(h+c)/(h²+c²)

I would appreciate if my answer is chosen as a brainliest answer

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Formula to find the missing number Faces:15 vertices:15 edges:?

gtnhenbr [62]

Answer:

Step-by-step explanation:

Euler's formula is

V - E + F = 2

Givens

V = 15

E = 15

F = ?

Solution

15 - 15 + F = 2

F = 2

I'm not sure this makes sense, but it is what the formula gives you.

7 0

3 years ago

how many ounces of pure water must be added to 50 ounces of a 15% saline solution to make a saline solution that is 10% salt

anygoal [31]

50 ounces of 15% saline solution contains 0.15*50 = 7.5 ounces of salt.

Let x be the amount of pure water you add to this solution. Then you end up with (x + 50) ounces of this new solution. The amount of salt stays the same.

You want the new solution to have a concentration of 10%. This means you need

7.5 / (x + 50) = 0.1

==> 7.5 = 0.1(x + 50)

==> 7.5 = 0.1x + 5

==> 2.5 = 0.1x

==> 2.5/0.1 = 0.1x/0.1

==> x = 25

7 0

3 years ago

What is equivalent expression 9y+y

andrew11 [14]

Answer:

10y

Step-by-step explanation:

9y+y=

10y

4 0

3 years ago

Y -13<br> --------- =<br> y -7<br><br>

mario62 [17]

y-13 / y-7

cross multiply

y-13 = y-7

collect like terms

y+y =-7+13

2y= 13 -7

2y = 6

divide both sides by 2

2y/ 2y = 6/2

y= 3

I hope this helped

4 0

3 years ago

Jose worked n hours at 8.75 dollars per hour he made a total of $61.25 write an expression that represents the total number of h

Nitella [24]

Answer:

n = P/8.75

Step-by-step explanation:

Jose’s pay (P) depends on the number (n) of hours he works.

P = 8.75n Divide both sides by 8.75

n = P/8.75

=====

P = $61.25

n = 61.25/8.75

n = 7 h

Jose worked for 7 h.

8 0

3 years ago