Answer:if you looked at hem like they were rows, in the first row the third one would be an expression. In the second row, the second one would be an expression. This is becuase they both have an equal sign.
First draw a number line both +ve and -ve integers and first represent root 2 on the number line and then root 3 and 4 5 6 and at last repesent 7 on it
Answer:
-2 3/4 < -1 1/2
Step-by-step explanation:
Positives are always greater than negatives (Example: 2 is greater than -2).
This eliminates the first and last inequalities.
Smaller negative numbers are always greater than larger negative numbers (Example: -2 is greater than -4).
This eliminates the third unequality.
For the second given inequality, convert the fractions to share the same denominator.
-2 3/4 < -1 2/4
They are both negative numbers.
We know smaller negative are always greater than larger negative numbers.
This inequality aligns with this statement.
Therefore, only the second inequlity is true.
A chemist plans to mix 10 liters of a 40% acid solution with some 70% to obtain a 50% solution
40% = 0.4
70% = 0.7
50% = 0.5
A chemist plans to mix 10 liters of a 40%. So 10 times of 0.4 = 4
Let x be the some amount of solution of 70%
70% of x = 0.7x
chemist obtain a 50% of solution
Amount of mixture is 10 + x
So 10+x of 50% = (10+x)*0.5
Now we frame an equation
10 * 0.4 + x * 0.7 = (10+x) * 0.5
4 + 0.7x = 5 + 0.5x
Subtract 4 and 0.5x on both sides
0.2 x= 1
Divide by 0.2
So x= 5
5 liters of 70% of solution is used.
