Answer:
Step-by-step explanation:
d = √(7-4)²+(3-1)²
= √3²+2²
= √9+4
= √13
Let x = Danielle, x + 5 = her sister, and .5x = her brother.
x + x + 5 + .5x = the sum of their ages.
Then we simplify to get 2.5x + 5 = the sum of their ages.
1.2mL will be needed to make 50 mL of a 2% solution
<h3>Ratio and proportions</h3>
Ratio are written in form of fractions.
If 50mL is required for a 2% solution, hence;
50% = 2mL
0.05 = 2mL
In order to determine the required mL for a 30% solution, we will have;
30% =x
0.03 = x
Find the ratios
0.5/0.3 = 2/x
Cross multiply
0.5x = 2(0.03)
0.5x = 0.6
x = 0.6/0.5
x = 1.2mL
Therefore 1.2mL will be needed to make 50 mL of a 2% solution
learn more on ratio and proportion here: brainly.com/question/12024093
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Answer:
A.
Step-by-step explanation:
Since the 2 shorter sides are greater than the longest side when added, it meet the triangle inequality thoerem. Triangle Inequality Theorom: The longest side of a triangle is less then the 2 shorter sides added.
