Answer:
A: 114, B: 84
Step-by-step explanation:
Let A be weight of Train A, B be weight of Train B. Since A is heavier than B by 30 tons, A = B + 30. Since A + B = 198, you can substitute for A to get (B+30) + B = 198. Then simplify so 2B = 168 and B = 84.
Then plug B into A = B+30 to get A = 114.
Answer:
k=57
Step-by-step explanation:
Multiply both sides by 5
k-2=55
Move the constant to the right-hand side and change its sign
k=55+2
k=57
Answer:
Kaylee wins.
Step-by-step explanation:
Melissa-> 1 Point
((5*2)-12)+3
(10-12)+3
-2+3
1
Kaylee-> 6 Points
((-3*2)-1)+6+7
(-6-1)+13
-7+13
6
Answer:
She would need 
flour to make 
times the recipe.
Step-by-step explanation:
To make 1 recipe Amelia uses = 
of flour.
So, to make times the recipe she would need =
.
We evaluate the above mixed numbers by converting them to fraction(by multiplying denominator with whole number and adding to numerator and write as fraction of same denominator.).
Then converting back to mixed number (by dividing the numerator by denominator and writing the quotient as the whole number and the remainder as fraction with same denominator.
So, she would need flour to make times the recipe.
Answer:
undefined
Step-by-step explanation:
To find the slope of the line between two points, use the slope formula 
. 
and 
represent the x and y values of one point the line passes through, and 
and 
represent the x and y values of another point the line also passes through. Therefore, use the x and y values of the points (0,3) and (0,4) to find the slope. Substitute them into the formula in the right order:
However, we can't divide 1 by 0. Therefore, the slope is undefined. (You could also graph the points to see that they form a vertical line, and all vertical lines have an undefined slope.)
