Answer:
Explanation:
B. Assessing the claims of your discussion partner
Answer:
75years
Explanation:
Let the Father's age be represented by 2x
Let the Son's age be represented by x
Five years ago;
Man's age will be = 2x - 5
Son's age will be = x - 5
If the ratio of their ages five years ago was 9:4, then;
2x - 5/x-5 = 9/4
4(2x - 5) = 9(x - 5)
8x - 20 = 9x - 45
- Collect like terms
-20 + 45 = 9x - 8x
25 = x
Hence, the son's age = 25 years
If x = 25, the father's age (2x) will be 2 × 25 = 50years
The sum of their ages will be = 25years + 50years = 75years
Answer: Definition of Selectively Permeable Membranes. All cells are enclosed with a cell membrane. A selectively permeable cell membrane is one that allows certain molecules or ions to pass through it by means of active or passive transport.
The dependent variable is Salt and Water
Because salt is an ionic compound. Namely hydrophilic compounds, meaning compounds that like water.
<h2>Further explanation
</h2>
Water dissolves NaCl by hydrating and stabilizing its ions (Na + and Cl-), weakening the electrostatic interaction between the ions so as to prevent the formation of ionic bonds to form NaCl crystals.
The dissolution process occurs through the replacement of hydrogen bonds between biomolecules with one another by hydrogen bonds between the biomolecules and water so as to prevent electrostatic interactions between biomolecules.
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salt dissolution process brainly.com/question/11526794
Compounds brainly.com/question/11526794
Details
Class: Middle School
Subject: Biology
Keywords: compound, salt, hydrophilic
The inner plants are rocky and terestial. so D
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