The number of combinations are 9. Its really simple, just do 3 x 3 = 9
A pair of vertical angles are B and D, because they are vertical, or across from, each other.
Hope this helps! :)
Answer:
A) -56
Step-by-step explanation:
B) First, you have to ignore the plus sign, and recognize that the second negative number means you are subtracting that number.
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It is a type of active transport because it will require energy to move against the concentration gradient (low to high)
- option A
Answer:
x is mL of 25% acid and y is mL of 50% acid
We set up 2 equations:
A) x + y = 250
B) .25 x + .50y = .35 * 250 which equals
B) .25x + .50y = 87.50 Multiplying A) by -.5
A) -.5x -.5y = -125 adding the equations we get
-.25x = -37.50
x = 150 mL
y = 100 mL
Source: http://www.1728.org/mixture.htm
Step-by-step explanation:
