If the ratio of red to blue pens is 3:1, we can find the amount of blue pens by multiplying by 1/3, to get 21*1/3=7. There are 21 red pens and 7 blue pens, so there are 21+7=28 pens total.
Answer:
Hello! answer: 60 and the triangle is a Equilateral because each measure is the same HOPE THAT HELPS!
Answer:
2361
Step-by-step explanation:
girls: 9 boys: 11
Step-by-step explanation:
16 (total girls) - 7 (the amount of girls hat prefer grapefruit) is 9
and 14 (total boys) - 3 (the amount of boys that prefer grapefruit) is 11
Answer:
∠ABE = 33°
Step-by-step explanation:
<h3>Angle bisector:</h3>
Angle bisector is a straight line that divides the angle into two congruent (equal) angles.
So, BE bisects the ∠ABD into two equal angles.
⇒∠ABE will be half of ∠ABD
∠ABD = ∠ABE + ∠BED
66° = ∠ABE + ∠ABE
66 = 2∠ABE
∠ABE = 66/2
∠ABE = 33°
