12 + 42 is 54. If you take the numbers apart and add them into tens. 42 because 4 10s and your left with 2 ones. If you take 12 and seperate it into tens you get 1 ten with a remainder of 2. 10 + 10 + 10 + 10 + 10 = 50. 2+2 is 4. Remember that they are the same number so 50 + 4 is 54.
Answer:
Step-by-step explanation:
3(10 – 4x) + 6 = 12
first you need to use the distributive property
30 – 12x + 6 = 12
then subtract 6 from each side
30 – 12x = 6
then subtract 30 from each side
– 12x = -24
divide both sides by negative 12
x = 2
Answer:
Question 5: y = - 
x + 6
Question 6: y = 
x + 100
Question 7: y = -10x + 45
Answer:
A = 27 ft²
Step-by-step explanation:
A = 6*8 - 3*2 - 3*5
A = 48 - 6 - 15
A = 27
A+b+c=-44.84
a=26.6
b=c
26.6+b+b=-44.84
2b=-44.84-26.6
b=-35.72
So, a=26.6, b=-35.72, c=-35.72
