Answer:
A. 60°
Step-by-step explanation:
There's a very straight-forward explanation for this, thank god! XD
For this type of problem, there's a rule to follow for the outside angle. X and 120 should equal 180, so all you need to do is fill that gap.
180-120 = 60
60 is your answer because it completes the whole angle.
3x+y-2z=22
x+5y+z=4
x=-3z
3(-3z)+y-2z=22
-9z+y-2z=22
-11z+y=22
-3z+5y+z=4
-2z+5y=4
-11z+y=22
-2z+5y=4
-55z+5y=110
--2z+5y=4
----------------------
-53z=106
z=2
-2(2)+5y=4
-4+5y=4
5y=8
y=1.6
x=-3(2)
x=-6
x=-6
y=1.6
z=2
Answer: option D
-5D means multiply all the elements of D by -5
i.e. -5 * -10 = 50
-5 * 10 = -50
-5 * -5 = 25
-5 * 15 = -75
Answer:
<h2>9/28</h2>
Step-by-step explanation:
<em><u>2 3/7 - 1 1/4</u></em>
<em><u>2 3/7 - 1 1/4First turn the two mixed numbers into improper fraction:</u></em>
<em><u>2 3/7 - 1 1/4First turn the two mixed numbers into improper fraction:17/7 - 5/4</u></em>
<em><u>2 3/7 - 1 1/4First turn the two mixed numbers into improper fraction:17/7 - 5/4Next find the Lowest Common Denominator:</u></em>
<em><u>L.C.D = 28</u></em>
<em><u>L.C.D = 2821 - 12/28</u></em>
<em><u>L.C.D = 2821 - 12/28= 9/28</u></em>
<u>It won't be a mixed number because the denominator is bigger than the numerator.</u>
Answer:
2 3/4
Step-by-step explanation:
I think is the right answer hope it helps