Answer:
The train A weighs 137 tons and train B weighs 60 tons.
Step-by-step explanation:
We are given the following in the question:
There are two trains.
Train A and Train B.
Let x tons be the weight of train A and y tons be the weight of train B.
Total weight = 197 tons.
Thus, we can write the equation:
Train A is heavier than train B.
The difference of their weights is 77 tons.
Thus, we can write the equation:
Solving the two equations, we get,
Thus, the train A weighs 137 tons and train B weighs 60 tons.
Answer:
the answer is
Step-by-step explanation:
(x - 10) × 2
You have to multiply it by 2 so that you get the area
Answer: The height of the palm tree is 21 feet.
Step-by-step explanation:
We can use a ratio to solve this:
Actual height to shadow for both objects. The fraction equivalents must be equal.
6/8 = x/28 . Cross multiply
6(28) = 8x
168 = 8x Divide both sides by 8 (8's "cancel" on the right)
168/8 =8x/8
21 = x . This gives us the tree's height as 21 feet.
<em>Another way to solve this is to use the ratios, but simplify the first fraction</em>
<em>6/8 = 3/4</em>
<em>Then multiply the length of the shadow by 3/4</em>
<em>3/4 × 28 = height</em>
<em>28÷4 = 7 7 × 3 = 21</em>
<em>21 feet= the height of the palm tree.</em>
Answer:
5x^2-6x-10
Step-by-step explanation:
(2x^2-2x)-(-3x^2+4x+10)
2x^2-2x+3x^2-4x-10
5x^2-2x-4x-10
5x^2-6x-10
