1. algebra x
2. _______ a -----------b _______c _________d
3. right angle
4. quadrilateral
5. algebra project a
opposites
lines
angles
right angles
defines
The inequality is 7x + 21 
Step-by-step explanation:
<u>DATA:</u>
Let the number be x
Number times 7 = 7*x
Sum of a number times 7 and 21 = 7x + 21
Is at least 29
<u>INEQUALITY:</u>
7x + 21 
<u>SOLVE:</u>
7x
7x
x 
Therefore, the inequality is 7x + 21 
Keyword: Inequality
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While if u mean 5^3+1^3 then it’s 5^4 but if you mean 5^3+1^3 then it is 126
The answer is the third one
(100-15)% = 85% = 136 students
136 / (85%) = 130*(100/85) = 160 students