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who like yo help me please?

i don’t not how do this. is for my math class please help. is really hard for me because i don’t speak English but a attempt. please help me this is for tomorrow. :}

1)how many liters of pure acid must be added to 3 liters of a 50% acid solution to obtain a 75% acid solution?

A= 1L B=4.5 L C. 1.5 L

2) joe and janna leave home at the same time, traveling in opposite directions. joe drives 45 miles per hour and janna drives 40 miles per hour. in how hours will they be 510 miles apart?
A=6 hours B=5 hours D= 4 hours

3) temperature in the death valley, california, the highest ground Temperature recorded was 9c on july 15,1972. in the formula c= 5/9(F-32), c represents the temperature in the degrees celsius and f represents the temperature in degrees fahrenheit. to the nearest degree, what is the highest ground temperature in death valley in fahrenheit?

a= 201
b = 84
c=34
d.137

please explain and if they can, in Spanish

1) you have 1.5 l of non-acid and want that to be 25%, so 100% = 6l, so you need 3l of pure acid.

But that is not one of your options !!!

Usted tiene 1.5l que no es acido, y quiere esta 25%, entonces 100% = 6 l, so necesita 3l de acido puro.

Pero eso no es una de sus opciones !!

2) separate 85 miles per hour, 510 / 85 = 6
so A – 6 hours

Separan a 85 millas por hora. 510/85 = 6
Entonces A – 6 horas

3) You have typed the question wrong – the highest was not 9c – how many was it ?

Puso la cuestion equivocada – no es 9c – cuantos fue ?

  1. beardouk
    March 12th, 2010 at 15:55 | #1

    1) you have 1.5 l of non-acid and want that to be 25%, so 100% = 6l, so you need 3l of pure acid.

    But that is not one of your options !!!

    Usted tiene 1.5l que no es acido, y quiere esta 25%, entonces 100% = 6 l, so necesita 3l de acido puro.

    Pero eso no es una de sus opciones !!

    2) separate 85 miles per hour, 510 / 85 = 6
    so A – 6 hours

    Separan a 85 millas por hora. 510/85 = 6
    Entonces A – 6 horas

    3) You have typed the question wrong – the highest was not 9c – how many was it ?

    Puso la cuestion equivocada – no es 9c – cuantos fue ?
    References :

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