Answer:
The correct answer is - 800.
Explanation:
Given:
Total amount = ? or assume x
spend in buying birthday item = 3/4 of x
given to sister = 1/5 of x
remaining to mother = 40
solution:
the remaning amount = x- (3x/4+x/5) = 4=
=> x- 19x/20 = 40
=> x = 20*40
=> x = 800
thus, the correct answer is = 800
Forming a hypothesis
Explanation:
The step in an investigation which involves the prediction of results is the stage of forming of a hypothesis.
- A hypothesis is a stage in scientific investigation that follows shortly after asking a simple scientific question.
- Hypothesis is simply a scientific guess that is logical in nature.
- It presents a problem in a manner in which the problem is stated, the cause and the likely outcome can be predicted.
- After a hypothesis formulation, the experiment is conducted and results of findings weighed against the predictions of the statement.
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Hypothesis brainly.com/question/3418951
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Answer:
15:37
Explanation:
cant simplify because 37 is prime
The acid and alkali that would react to make sodium sulfate is
alkali= sodium hydroxide
acid = sulphuric acid
<u><em>explanation</em></u>
Acid react react with alkali to form salt and water.
For sodium sulfate salt to be formed a sulfate acid is required to react with a hydroxide of sodium .
therefore Sodium hydroxide (alkali) react with sulphuric acid (an acid) to form sodium sulfate (salt) and water.