Using the definition of vertical angles, the value of z is: 15.
<h3>Vertical Angles Pair</h3>
The two pairs of opposite angles formed when two straight lines intersect are called vertical angles, and are therefore congruent to each other.
Thus:
2z + 10 = 40
2z = 40 - 10
2z = 30
z = 30/2
z = 15
Therefore, using the definition of vertical angles, the value of z is: 15.
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Answer:

Step-by-step explanation:

36
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4 5/8*3 is 13.875
500 decided by 13.875 is a little over 36, so you can make 36 full ribbons
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h=1.29 c=0.79
Step-by-step explanation:
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19 )
do cross multiply
and answer will come
Step-by-step explanation:
w+ý=z/y