Answer: it cost a customer $7.25 to buy five tulips and $10.5 to buy six roses.
Step-by-step explanation:
Let x represent the cost of 1 tulip.
Let y represent the cost of 1 rose.
The price of each tulip is the same and the price of each roses the same. One customer bought seven tulips and nine roses for $25.90. This means that
7x + 9y = 25.9 - - - - - - - - - - - - - - 1
Another customer bought for four tulips and eight roses for $19.80. This means that
4x + 8y = 19.8- - - - - - - - - - - - - - - 2
Multiplying equation 1 by 4 and equation 2 by 7, it becomes
28x + 36y = 103.6
28x + 56y = 138.6
Subtracting, it becomes
- 20y = - 35
y = - 35/ - 20
y = 1.75
Substituting y = 1.75 into equation 2, it becomes
4x + 8 × 1.75 = 19.8
4x + 14 = 19.8
4x = 19.8 - 14 = 5.8
x = 5.8/4
x = 1.45
The cost of 5 tulips would be
1.45 × 5 = $7.25
The cost of 6 roses would be
1.75 × 6 = $10.5
The is c for this question
Answer:
The length is 9.
The width is 7.
Step-by-step explanation:
A rectangle has two dimensions.
The width, which is the distance between the points who have the same value of y.
The length, which is the distance between the points who have the same value of x.
Distance between 2 points:
Points (a,b) and (c,d).
Same value of x:
(-1,1), (-1-8) or (6,1), (6,-8)
The distance for both of them is the same, can calculate for only one.
The length is 9.
Same value of y:
(-1,1), (6,1) or (6,-8), (-1,-8)
The width is 7.
