Answer:
1. (-1,-2), 2. B
Step-by-step explanation:
The first thing to notice with this question is that the volume of the tank is given in cm3 yet the rate at which the water leaks is in litres, so a conversion of units will be neccessary. We know that there are 1000cm3 for every litre so 45000cm3 is equivilent to 45 litres (45,000/1000 = 45). So what do we know now? Well the tank of water contains 45 litres, and every minute 0.75 litres is lost, so our objective is to find out how many miuntes go by before the tank is empty. In other words how many 0.75s go into 45, luckily division can help us out. 45/0.75 = 60 minutes.
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Hope this helps you
Answer:
Generally, the algebraic expression should be any one of the forms such as addition, subtraction, multiplication and division. To find the value of x, bring the variable to the left side and bring all the remaining values to the right side. Simplify the values to find the result.
-2d + 3(-7d + 9)...distribute the 3 thru the parenthesis
-2d - 21d + 27.....combine like terms
-23d + 27 <====
let me break the distribution down for u....ur basically multiplying the 3 by everything in the parentheses...to get rid of the parenthesis
3(-7d + 9) = (3 * -7d) + (3 * 9) = -21d + 27
Answer: Angle Y is 90 degrees, angle X is 35.
