The expression for the total cost of hiring a plumber will be equal to $50 + $40(h).
Mathematical actions are called expressions if they have at least two terms that are related by an operator and include either numbers, variables, or both. Adding, subtraction, multiplying, and division are all reflection coefficient operations. A mathematical operation such as reduction, addition, multiplication, or division is used to integrate terms into an expression.
As per the given statement in the question,
The charge for a plumber to visit the house = $50
The additional charge per hour = $40
The expression for t hours will be,
A = $50 + $40(h),
Here, A is the total amount and h is the number of hours the plumber is working.
To know more about the expression:
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(ii) the number of such books that have a mass
of 20 kg.
Answer:
The mass of 150 books = 41.7kg
The number of books that have mass 20kg = 72 books
Step-by-step explanation:
(I) Number of identical books = 108
Mass of books = 30 kg
Mass of 150 books = ?
Let the mass of 150 books = x kg
To find the mass of 150 books we will use ratio and proportion:
108 books: 30kg = 150 books: x kg
You can also write it like this because ratio can be written in division:
108/30 = 150/x
By cross multiplication:
108x = 150*30
108 x= 4500
Divide both sides by 108
108 x/108 = 4500/108
x= 41.7
Thus the mass of 150 books = 41.7kg
( ii ) The number of books that have a mass of 20 kg = ?
Let assume that the number of books of mass 20 kg = y books
We will again use ratio and proportion method.
108 books: 30kg = y: 20kg
We can write it as:
108/30 = y/20
By cross multiplication:
108 *20 = 30y
2160= 30y
Divide both the terms by 30
2160/30 = 30y/30
72 = y
Therefore the number of books that have mass 20kg = 72 books ....
Answer:
The amount that Hannah has is $98
Step-by-step explanation:
Let
x-----> amount that Hannah has
y ----> amount that Francine has
z ----> amount that Peter has
we know that
----> equation A
----> equation B
-----> equation C
substitute equation C in equation B
----> equation D
we have
----> equation A
----> equation D
Solve the system of equations A and D by graphing
Remember that the solution is the intersection point both graphs
using a graphing tool
The solution is the point (98,22)
see the attached figure
Find the value of z
---->
therefore
The amount that Hannah has is $98
The amount that Francine hasis $22
The amount that Peter has is $132
B) 15
C) 1 16
D) 26 100
D. 26,100 I believe is your answer
Answer:
Yes. Because the cost of the mangoes was $20, and because Bryan bought 16 mangoes, the cost for each mango had to be more than $1.00.
Step-by-step explanation:
Since each banana cost 0.25 cents, just multiply 0.25 by 22 to get 5.5. Subtract 5.5 from 25.5 to get 20. This means that Bryan spent $20 on mangoes. Divide 20 by the number of mangoes (16) to get $1.25, which is more than $1.