Answer:
(1,-1)
Step-by-step explanation:
Given,
The starting point of the car is (5,7) and end point of the car is (-2,-7),
So, the equation that represents the position of car,
Similarly, the start point of the limo is (3,-5) and end point of the limo is (-4,9),
So, the equation that represents the position of limo,
Adding equation (1) and (2),
4x = 4 ⇒ x = 1
From equation (1),
2(1) - y = 3 ⇒ -y = 3 - 2 ⇒ -y = 1 ⇒ y = -1
Hence, the intersection point of line (1) and (2) is (1,-1).
If gold coin weigh 20 grams. If the coin contains gold,copper and tin and in the ratio 4:3:1 then 10gm of gold is present in coin.
A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0.
Given,
A gold coin weigh 20 grams
the coin contains gold, copper and tin and in the ratio 4:3:1
We need to find the amount of gold in the coin.
Now let us add the ratio.
4x+3x+x=20
8x=20
Divide both sides by 8.
x=2.5
The amount of gold in coin is 4x.
4(2.5)=10 gm
Hence, 10 gm of gold is present in 20 grams of coin.
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