Three orders are placed at a pizza shop.
1 answer:
Given:
Two small pizzas, a liter of soda, and a salad costs $14.
One small pizza, a liter of soda, and three salads costs $15.
Three small pizzas, a liter of soda, and two salads costs $22.
To find:
The cost of each item.
Solution:
Let x be the cost of a small pizza.
y be the cost of a liter of soda
z be the cost of a salad.
According to the question, two small pizzas, a liter of soda, and a salad costs $14.
...(i)
One small pizza, a liter of soda, and three salads costs $15.
...(ii)
Three small pizzas, a liter of soda, and two salads costs $22.
...(iii)
From (i), we get
...(iv)
Putting in (ii), we get
...(v)
Putting in (iii), we get
Multiply both sides by 2.
..(vi)
Subtracting (vi) from (v), we get
Putting x=5 in (vi), we get
Putting x=5 and y=1 in (iv), we get
So, .
Therefore, the cost of a pizza is $5, cost of a liter of soda is $1 and cost of salad is $3.
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Answer:
53
Step-by-step explanation:
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(2 + 7i)(2 - 7i)
(2 * 2) + (2 * -7i) + (7i * 2) + (7i * -7i)
4 + -14i + 14i +
4 + (
= -1)
4 + (-49 * -1)
4 + 49
53.
53 is the result.
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#teamtrees #WAP (Water And Plant)
Answer:
(a) 4.152698
(b) 3.215557
Step-by-step explanation:
(a)
n=4, so :
Each subinterval has length :
Therefore the subintervals consist of:
Now, the midpoints of these subintervals are:
Hence:
(b)
n=4, so :
Each subinterval has length :
Therefore the subintervals consist of:
[1,5], [5,9], [9,13]
The endpoints of the subintervals consist of:
5,9
Hence: