Answer:
10/11×99=90
Step-by-step explanation:
10/11×99=90
20/20×99=99
12/7×99=169 5/7
16/15×99=105 3/5
Answer:
6 times 5 = 30
the total is $162
162 + 30 = $192 at full price
Step-by-step explanation:
168cm2
Let r cm be the radius of the balloon, then
<span>2pi(r)=23=>r=23/(2pi) </span>
<span>The surface area= </span>
<span>4pi(r^2)= </span>
<span>4pi[23/2pi)]^2= </span>
<span>(23^2)/pi=168.386 cm^2 </span>
<span>approximately.</span>
<span>So we have a problem with two unknows and one equation. We have to express one over the other like this: 7a - 2b = 5a + b. First we separate one kind on the left side and the other kind on the right side: 7a - 5a = b + 2b. Then: 2a = 3b. Now we divide both sides by 2 and get: a= 3b/2.</span>
