Answer:
b. -1
Step-by-step explanation:
9=4a+13
-13 -13
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-4=4a
4a/-4
a=-1
Answer:3
Step-by-step explanation:
Answer:
72°
Step-by-step explanation:
The circle is divided into 5 parts.
A circle measures 360°.
360/5 = 72°
hope this helps!! p.s. i really need brainliest :)
Answer:
Step-by-step explanation:
Final concentration % = [grams of salt / mililiters of solution] * 100
grams of salt = grams of salt from solution 1 + grams of salt from solution 2
grams of salt from solution 1 = mililiters * %/100 = 80 mililiters * 0.25 g/mililiters = 20 g
grams of salt from solution 2 = mililiters *%/100 = x*0.10 g/mililiters = 0.1x
mililiters of final solution = mililiters from solution 1 + mililiters from solution 2
mililiters of final solution = 80 mililiters + x mililiters
=> Final concentration, % = [0,10x + 20 g] / [x + 80 mililiters] * 100
Rotate the shape about its central axis by making it stationary.
