Answer:
Step-by-step explanation:
∠1 and ∠2 are vertical angles.
∠1 = ∠2
<u>Part A:</u>
<u></u>
Create an equation and solve for x.
20x + 21 = 30x - 29
Add 29 and -20x on both sides.
20x + 21 + 29 - 20x = 30x - 29 + 29 - 20x
Simplify the equation.
50 = 10x
Divide both sides by 10.
=
Simplify the equation.
5 = x
Switch sides.
x = 5
<u>Part B:</u>
<u></u>
Let x = 5
20(5) + 21
Distribute.
100 + 21
Add.
= 121
Since both angles are vertical angles, they are equal.
∠1 = 121°
∠2 = 121°
The total combination of 3-coin is 4 if there are a total number of coins is 4 option third is correct.
<h3>What is permutation and combination?</h3>
A permutation is the number of different ways a set can be organized; order matters in permutations, but not in combinations.
We have:
Number of coin need to select = 3
Total number of coins = 4 (pennies, nickels, dimes, and quarters)
We can apply the combination formula to find the number of combination:
Total number of combination = C(4, 3)
= 4
Thus, the total combination of 3-coin is 4 if there are a total number of coins is 4 option third is correct.
Learn more about permutation and combination here:
brainly.com/question/2295036
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Answer:
Apply the distributive property.
2x3+4−−x2−(3x)2x3+4--x2-(3x)
Multiply −−x2--x2.
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Multiply −1-1 by −1-1.
2x3+4+1x2−(3x)2x3+4+1x2-(3x)
Multiply x2x2 by 11.
2x3+4+x2−(3x)2x3+4+x2-(3x)
Multiply 33 by −1-1.
2x3+4+x2−3x2x3+4+x2-3x
Move 44.
2x3+x2−3x+4
Answer:All the information needed to slice the problem isn’t listed.
Step-by-step explanation:
Add them all.34,6000 and 15000 and 2900 and 4050