B) If one gallon of paint covers 0.5 square meters, how many gallons of black paint will the need to paint the house?
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2/10, which can be reduced to 1/5.  

2. If a tank is 5/8 filled with solution, how much of the tank is empty?  

Ans: 3/8 of the tank is empty. Since the whole tank would equal 8/8, or 1, and 5/8 of it is filled, then that  

means 3/8 of it remains empty.  

3. 1/2 x 3/5 x2/3 =  

Ans: 6/30, which can be reduced to 1/5.

4. 5/9 ÷ 4/11 =  

Ans: 55/36. You cannot reduce this fraction any further.  

5. Convert 27/4 to a decimal.  

Ans: 6.75. This answer is arrived at by dividing 4 into 27.  

6. Convert 0.45 to a fraction.  

Ans: 45/100, which can be reduced to 9/20.  

7. 4.27 x 1.6 =  

Ans: 6.832  

8. 6.5 ÷ 0.8 =  

Ans: 8.125  

9. 12 + 4.52 + 245.621 =  

Step-by-step explanation:

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x