Answer:
Step-by-step explanation:
A - an angle
S - its suplementary angle
A = S - 142°
Suplementary angles add to 180° so:
A + S = 180°
S - 142° + S = 180°
2S = 322°
S = 161°
A = 161° - 142° = 19°
1/4*13=3.25 gallons
2.50*4=10
3.25+4=7.25
The answer is 7.25 gallons
B.negative one-third
C.3
D.The slope is unidentified
Answer:
About 21.4%
Step-by-step explanation:
280 - 220 = 60
60 of 280 = ?
Variable x = percentage
60/280 = x/100
Cross multiply
60 × 100 = 280 × x
6000 = 280x
Divide both sides by 280
6000 ÷ 280 = 280x ÷ 280
21.428.... = x
About 21.4%
Check work:
60/280 = 21.4/100
Cross multiply
60 × 100 = 280 × 21.4
6000 = 5992
6000 is close to 5992
It does not equal exactly 6000 because I estimated the percentage to 21.4% instead of 21.428....%