Answer:
A
Step-by-step explanation:
If you multiply the coefficient matrix by the variable matrix, you get the part of the system of the equations left of the equal sign.
Choice A gives you the correct answer.
The postulate you can use to prove that those triangles are congruent is the SSS. Since BC and AD are congruent (given), AB and DC are congruent (given), and AC and AC are congruent (i forgot which postulate it is, however, it states that the same line is congruent with itself)
hope this helps
Answer:
Step-by-step explanation:
the dot means multiply
Answer:
6 machines
Step-by-step explanation:
Let x be the time needed for 1 machine to complete the job, so rate of one machine is (rate is the reciprocal of time)
rate of 4 machines would be