Answer:
300ft²
Step-by-step explanation:
base=LW = 10x10=100
triangles=1/2bh = 1/2(10)(10)=50 (4 of them)
100+4(50)=
100+200=300ft²
Answer:
7 & 13
Step-by-step explanation:
Let the first number be x
2nd number = 8 less than 3 times the other
2nd number = 3x - 8
Their sum = 20
X + 3x - 8 = 20
4x -8 = 20
Collect like terms
4x = 20+8
4x = 28
Divide both sides by 4
4x/4 = 28/4
X = 7
First number = 7
2nd number = 3x - 8
= 3(7) - 8
= 21 -8
= 13.
Therefore the numbers are 7 and 13
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Answer:
-17
Step-by-step explanation:
-17 (-5+-12) was what you technically started with and should end with by just reversing the problem: -17+5=-12.