I hope this helps you
10^2=5^2+x^2
100-25= x^2
x= 5 square root of 3
Let's call the 13¢ stamps a and the 18¢ stamps b:
a+b = 42 and therefore a= 42-b (formula 1)
0.13a+0.18b= 6.66 In this formula, substitute the value of a according to formula 1:
0.13(42-b)+0.18b= 6.66 Multiply on the left to get rid of the parenthesis:
5.46-0.13b+0.18b= 6.66 Subtract 5.46 from both sides:
-0.13b+0.18b= 1.20 Add on the left:
0.05b= 1.20 Divide both sides by 0.05
b= 24 You have 24 18¢ stamps and:
42-24= 18 13¢ stamps
Check: (24 x 0.18) + (18 x 0.13)= 6.66 Correct.
There are 648 ft in 216 yds. :)
Answer:
San Antonio de Valero Mission.
Step-by-step explanation:
San Antonio de Valero, one of five Spanish missions established by Franciscans in what is now San Antonio, is most commonly known as the site of the battle of the Alamo (1836).
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