Answer:
Step-by-step explanation:
we have
----> equation A
-----> equation B
----> equation C
adds equation A and equation C
-----> equation D
adds equation B and equation C
-----> equation E
we have the system
-----> equation D
-----> equation E
Multiply equation E by -1.5 both sides
-----> equation F
adds equation D and equation F
<em>Find the value of z</em>
substitute the value of y in equation E (or substitute in equation D)
<em>Find the value of x</em>
substitute the value of y and z in equation A (or equation B or C)
therefore
The solution of the system of equations is
Answer: b. 180
Step-by-step explanation:
The sum of the angles of a triangle is 180°.
Answer:
Step-by-step explanation:
This is an arithmetic sequence. Each term is 9 more than the preceding term.
The 25th term is 5+24*9 = 1085.
Sum of first 25 terms is 25(5+1085)/2 = 13625
Answer:
x² - 5x + 4
Step-by-step explanation:
Note that (p - q)(x) = p(x) - q(x)
p(x) - q(x)
= x² - 1 - 5(x - 1) ← distribute
= x² - 1 - 5x + 5 ← collect like terms
= x² - 5x + 4
4 4/5 you make the whole number a fraction by putting a 1 under it and the multiply like normal then make it into a mixed number<span />