The correct answer is 771
Answer:
<h2>y = 9</h2>
Step-by-step explanation:
Put x = 5 to the equation -6x - 3y = -57
(-6)(5) - 3y = -57
-30 - 3y = -57 <em>add 30 to both sides</em>
-3y = -27 <em>divide both sides by (-3)</em>
y = 9
Answer:
24 units ²
Step-by-step explanation:
In this problem, we are given the circumference of a triangle (after finding the perimeter) and want to find the area of a circle with that circumference. Since the area of a circle is a function based on its radius, we can use the circumference to find the radius to find the area.
First, we can figure out the perimeter of the triangle, which is equal to the sum of its sides. The perimeter is 6+4+7.21 = 17.21 units.
Next, the circumference of a circle is equal to π * diameter = π * 2 * radius. Using 3.14 for π and r for radius, we get
3.14 * 2 * r = 17.21
6.28 * r = 17.21
divide both sides by 6.28 to isolate r
r ≈ 2.74
Furthermore, to find the area from the radius, we can use
area = πr². Plugging 2.74 in for r, we get
2.74² * 3.14 = area
≈23.6, rounding up to 24 units ²
Answer:
D
Step-by-step explanation:
Answer:
Bag: 800/100 = 8*15 = 120
Umbrella: 400/100 = 4*15 = 60
120 - 60 = 60
The shopkeeper has gained 60 from the transaction