Answer:
2250 trees
Step-by-step explanation:
Find how many eucalyptus trees are planted in an hour.
4 hours = 1000
1 hour = 1000 ÷ 4 = 250
20 pupils = 250
1 pupil = 250 ÷ 20 = 12.5 (in an hour)
30 pupils = 12.5 x 30 = 375 trees (in an hour)
6 hours = 375 x 6 = 2250 trees
When we are given a system of 3 linear equations, with 3 variables, we proceed as follows:
We consider 2 pairs or equations, for example (1, 2) and (2, 3), and eliminate one of the variables in each pair, creating a system of 2 linear equations with 2 unknowns.
Note that the third equation contains -2y which can be used to eliminate easily -6y in the second equation, and -4y in the fourth.
i) consider equations 1 and 3:
-3x-4y-3z=-7
5x-2y+5z=9
multiply the second equation by -2:
-3x-4y-3z=-7
-10x+4y-10z=-18
adding the 2 equations we have -13x-13z=-25
ii) consider equations 2 and 3. Multiply the third equation by -3:
2x-6y+2z=3
-15x+6y-15z=-27
adding the 2 equations we have -13x-13z=-24
So we got -13x-13z is -25, but also -24. this means the system is inconsistent, so it has no solution.
Answer: the system has no solutions
Answer:
A horizontel line equation y=0x+-9 the slope is zero slope
Step-by-step explanation:
Assuming you mean 2x to the 4th degree is 2x^4, the expression is 2x^4 + 5x.
And the value of that expression when x = 6 is:
2 (6^4) + 5(6) = 2 (1296) + 30 = 2592 + 30 = 2622
Answer: 2622
Answer:
See below
Step-by-step explanation:
x = part 1
3x = part 2
x + 3x = part 3 summed, they equal 1000
x + 3x + x + 3x = 1000
8x = 1000
<u>x = 125 3x = 385 third part = 500 </u>
