20 points and brainliest if answered and explained!

triangle abc has the angle measures shown.

m∠a= (2x)°
m∠b= (3x)°
m∠c= (4x)°

which statement is true about the angles?

a) m∠a= 20°
b) m∠b= 60°
c) ∠a and ∠b are complementary
d) m∠a+m∠c= 100°

Jordan has $5.37, which he is using to buy ingredients to make salsa. he is buying one red pepper for $1.29 and three pounds of tomatoes. if jordan has exactly the right amount of money he needs, what is the price per pound of the tomatoes? choose the correct equation to represent this real-world problem. solve the equation and verify the reasonableness of your answer. a pound of tomatoes costs .

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?