Answer:
Step-by-step explanation:
Number of marbles with Betty = x
Number of marbles with Adelene = 3x
Adelene gives 25 marbles to Betty.
Now Adelene has (3x - 25) marbles and Betty has (x + 25) marbles.
3x - 25 = x + 25
Add 25 to both sides
3x - 25 +25 = x + 25 + 25
3x = x +50
Subtract x from both sides.
3x - x = x + 50 - x
2x = 50
Divide both sides by 2
2x/2 = 50/2
x = 25
Number of marbles with Betty = 25
Number of marbles with Adelene = 3*25 = 75
Marbles with both = 25 + 75 = 100
Answer:
Area = 216
Step-by-step explanation:
14 ⋅ 12 = 168
8 ⋅ 12 ÷ 2 = 48
164 + 48 = 216
<em>hope this helps :)</em>
Answer: 60 degrees
Step-by-step explanation:
Since we know that the sum of the angles in a triangle is 180 degrees, that means x + x+ x = 180.
3x = 180
x = 60.
Another way we could figure out that x = 60 was by realizing that this is an equilateral triangle, which means each angle must = 60 degrees.
Answer:
15 cm
Step-by-step explanation:
Circumference of circle= 2πr, where r us the radius of the circle.
Given that the circumference of circle is 60πcm,
60π= 2πr
Divide by 2 on both sides,
15π= πr
Divide by π on both sides,
15= r
Thus, radius of circle= 15cm.
Answer:8n-4
Step-by-step explanation: