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kparker7543
18.09.2021 •
Mathematics
A serviceman charges an hourly rate of $60, but also charges a fixed fee for making
house calls regardless of time spend on the job. One day, the serviceman earned a
total of $220 for a 3 hour job. Write an equation for C, in terms t, representing the
total cost of the serviceman's services if the serviceman spends t hours at the house
working?
Solved
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Ответ:
Step-by-step explanation:
pay rate = R = 60 dollars/hour
And time is 3 hours
60(t) + c = 220
So c can be computed(solve) by plugging back t value of 3 hours.
60(3) + c = 220
c = 220-180 => 40
Now the final equation is
F = 60(t) + 40, where F is the final cost
Ответ:
The last one, as shown in the attached picture.
Further explanationThe AAS (Angle-Angle-Side) postulate for the congruent triangles: two pairs of corresponding angles and a pair of opposite sides are equal in both triangles. The ASA (Angle-Side-Angle) postulate for the congruent triangles: two angles and the included side of one triangle are congruent to two angles and the included side of another triangle; the included side properly represents the side between the vertices of the two angles. The SAS (Side-Angle-Side) postulate for the congruent triangles: two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle; the included angle properly represents the angle formed by two sides.The SSS (Side-Side-Side) postulate for the congruent triangles: all three sides in one triangle are congruent to the corresponding sides within the other.- - - - - - - - - -
Notes
The angle-side-side postulate for the congruent triangles doesn't exist because an angle and two sides don't guarantee that two triangles are congruent. If two triangles have two congruent sides and a congruent non-included angle, then triangles don't seem to be necessarily congruent. This can be why there's no side-side-angle (SSA) and there's no angle-side- side postulate.The AAA (angle-angle-angle) postulate for congruent triangles does not work because having three corresponding angles of equal size is not enough to prove congruence. This principle is usually used for the similarity of two triangles.Learn moreWhich shows two triangles that are congruent by ASA? About vertical and supplementary angles Calculate the measures of the two angles in a right triangle