Answer:
a.) 
b.) 
c.) $
Step-by-step explanation:
a.) If she earns $7 'per' hour, this multiplication. After a week, we need to see how many hours she worked to earn $91, so this goes behind the equal sign. Let <em>h</em> be the unknown number of hours:

Solve for h. Divide both sides by 7:

Sylvia worked 13 hours at a rate of $7 an hour.
b.) She can work at most 15 hours a week. At 'most' can also mean less than or equal to. Let <em>h</em> be hours:

Sylvia can work less than or equal to 15 hours per week.
c.) If Sylvia can work 15 hours, plug in this value for <em>h</em> into an equation when she earns $7 per hour. Let the product of the hours and money equal <em>t</em> for total:

The most money Sylvia can earn in a week is $105.
<em>Finito.</em>
<u>The </u><u>scientific method </u><u>consists of the following </u><u>steps</u><u>: conceptualize a process or problem to be studied, collect research data, analyze the data, and draw conclusions.</u>
<u />
Which of the following study design categories focuses on observing and documenting behavior?
- Several various kinds of non-experimental studies in which behavior is routinely observed and documented are collectively referred to as observational research.
- A variable or combination of variables must be described in order to be the focus of observational research.
What are some examples of biological processes that have an impact on development?
- An individual's physical makeup can alter as a result of biological processes.
- and several biological processes that have an impact on development include weight gain, changes in motor skills, puberty's hormonal changes, and cardiovascular deterioration.
Learn more about documenting behavior
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1st =13
2nd = 13- -5 = 13+5 =18
3rd = 18 - -5 = 18+5 =23
4th = 23 - -5 = 23+5 = 28