C = 9 m the perimeter is all the sides added together you have 9 +8 that is 17 add another 9 and that equals 26 which is the perimeter.<span />
Here is the equation: x+(x+20) = 120
Since you can't combine anything yet, its x+x+20=120
You need to get x by itself
Minus 20 from both sides
Its x+x=100 now
Combine the x's which is now 2x
Now divide 100 by 2 which is 50
x=50
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Lets check:
50+(50+20)=120
Now combine the numbers in the parentheses
Its now 50+70=120
50+70=120 and 70-50=20
As you can see, he ran 50 minutes the first day and 70 minutes the second day
h2 + 52 = 102
<span> h2 = 10<span>2 </span>− 52 = 100 − 25 = 75 = 52×3</span>
<span> <span> h = 5</span></span>3 ≈ 8.7
Area A = ½×10×h ≈ ½×10×8.7 ≈ 43 cm<span>2</span>
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<span>Hope this helps</span>
Answer:6.76 cm2
Step-by-step explanation:
You have multiply 2.6 by 2.6 and then you have to square the cm so it will be 6.76 cm2
Answer:
-144?
Step-by-step explanation:
im not sure if that'll be the answer
