I need some help solving these

Mathematics

2 answers:

Allisa [31]3 years ago

8 0

Answer:1. 4x5

2. 7xm

3. 3xa

Step-by-step explanation: length times height to get area!

vodka [1.7K]3 years ago

6 0

Answer:

Number 1 would be 4 x 5 = area

Number 2 would be 7 x m = area

And number 3 would br 3 x a = area

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Add or subtract negative numbers

Naddika [18.5K]

$9+(-2)\\9-2\\=7$

$-6+(-3)\\-6-3\\=-9$

$4+(-9)\\4-9\\=-5$

5 0

3 years ago

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How many milliequivalents of sodium chloride are contained with 3 L of normal saline?

AVprozaik [17]

Answer:

466mEq

Step-by-step explanation:

First, we need to know the concentration of NaCl in a normal saline solution, this is by definition 0.9%, meaning we have 0.9g of NaCl per 100ml of solution, we want to know how much NaCl we have in 3L (3000ml):

$3000ml*\frac{0.9g}{100ml}=27g=27000mg$

So, we have 27000mg in 3L of normal saline solution.

Now, acording to our milliequivalent (mEq) equation ( $mEq=\frac{mg}{pE}$ ) where pE is de molecular mass of NaCl divided by their charges, in this case 1: