Answer:
what do you want to know? the question is incomplete.....
9514 1404 393
Answer:
- A + B = 389
- A - B = 263
- A = 326 tons
- B = 63 tons
Step-by-step explanation:
The first equation is an expression of the first given relationship:
A + B = 389 . . . . . . where A and B represents trains weights, respectively
The second equation is an expression of the relationship described in the next two sentences:
A - B = 263
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These equations can be solved by adding them together:
(A +B) +(A -B) = 389 +263
2A = 652 . . . . . . simplify
A = 326 . . . . . . . .divide by 2*
B = 326 -263 = 63
Train A weighs 326 tons.
Train B weighs 63 tons.
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* You may notice that this value is the average of the given sum and difference. That observation is true of all "sum and difference" problems.
Answer:
Step-by-step explanation:
hello :
h(t) = -t²+8t
the highest point is the vertex of this prabola (-b/2a ; h(t) )
a= -1 and b= 8 -b/2a = - (8)/2(-1) = 4
h(4) = -(4)²+8(4) = -16+32 = 16
first answer : 16
second answer : 4
Write an equation for the line you’ll need to find the slope