Interval Notation:
(−∞,∞)
Set-Builder Notation:
{x|x∈R}
Answer:
what do you need help with
Step-by-step explanation:
8)
The sum of angles of a triangle is 180º
Therefore:
x+x+98=180
2x=180-98
2x=82
x=82/2
x=41
Answer:
m∠E=41º
m∠F=41º
10)
The sum of angles of a triangle is 180º
Therefore:
3x+4x+5x=180º
12x=180
x=180/12
x=15
3x=3(15)=45
4x=4(15)=60
5x=5(15)=75
Answer:
m∠G=75º
m∠H=60º
m∠J=45º
Steps:
1. Do a proportion
2/3 times x/12
2. Do 12 times 2=24
3. Divide 24 by 3
4. Your answer is 8 girls
Or you could do it this way
Steps:
1. You could have just multiplied the 2 by a 4 to get 8.12 boys divided by 3 boys is 4. That means you multiple the two by 4 to get the girls.
