For this case, the first thing we must do is add all the masses.
We have then:
M = (41,918) + (41,918) + (24.83) + (24.83)
M = 133,496
We now write the answer in scientific notation:
M = 1.33496 * 10 ^ 2 grams
Answer:
The total mass of the four objects is:
M = 1.33496 * 10 ^ 2 grams
C. 65 degrees.
Triangles must equal 180 degrees. The given 50 means the rest of the triangle is equal to 130. I believe because of the Side-Angle-Side theorem of triangles (if my knowledge of proofs from 3 years ago is still with me), the two remaining angles are equal to each other. Let's call them X. 2x = 130. Divide both sides by 2. 130/2 = 65. So x=65
The solution to this system is (x, y) = (8, -22).
The y-values get closer together by 2 units for each 2-unit increase in x. The difference at x=2 is 6, so we expect the difference in y-values to be zero when we increase x by 6 (from 2 to 8).
You can extend each table after the same pattern.
In table 1, x-values increase by 2 and y-values decrease by 8.
In table 2, x-values increase by 2 and y-values decrease by 6.
The attachment shows the tables extended to x=10. We note that the y-values are the same (-22) for x=8 (as we predicted above). That means the solution is ...
... (x, y) = (8, -22)
Given:
25.7 kwh of electricity per day.
must reduce 20%
25.7 kwh * 20% = 5.14 kwh * amount of electricity to be reduced.
25.7 kwh - 5.14 kwh = 20.56 kwh * net of reduced electricity
The homeowner will use 20.56 kwh after reduction of 20%.
Answer:
Try the fourth one. Forgive me if I'm wrong.