Bella pays 7 payments of 5$ each to a game store. She returns one game and receives 20$ back. What is the change to the amount of money she has?
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Answer:
15
Step-by-step explanation:
Related Questions
Help me. I will mark brainliest
Write equivalent expressions for each:A. 2X+5X+7-3B. 4X-2Y=10XC. 2P+12+2P-8
How many solutions are possible for a triangle with B=44,a=23,=12?
Expand the logarithmic expression log(8) a/2
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x = 2(y - 6) . . . (1)
x + y = 18 . . . (2)
Putting (1) into (2) gives,
2y - 12 + y = 18
3y = 18 + 12 = 30
y = 30/3 = 10
x = 2(10 - 6) = 2(4) = 8
Therefore, Peter hit 8 home runs and Alice hit 10 home runs.
226
229
220
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Conclusion:
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c = h4
B)
h = 4c
C)
c = 4h
D)
c = 4 + h
I really need help on this.
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There are four properties of multiplication.
1) commutative property
2) associative property
3) multiplicative identity property
4) distributive property
The above problem shows a commutative property where when two numbers are multiplied together, the product is the same regardless of the order of the multiplicands.
Choice C. c = 4h Choice A. c = h4
Both 4 and h are multiplicands and whichever order they are, they always produce the same product.
For example. h is equal to 10
Choice C. c = 4 * 10 = 40 ; Choice A. c = 10 * 4 = 40.
Same product, different order of multiplicands.
Answer:
c = 4h
Step-by-step explanation:
c = 4h describes a situation where the number of chickens (c) is four times as large as the number of horses.
serve the ferry operator's needs?
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The boat must go 9mph on the lake in order for it to serve the ferry operator's needs
Represent the speed of the boat on the lake or in still water with x
Given that:
The current in a river has a speed of 6 mph.
- When the boat goes upstream, the speed is x - 6;
- When the boat comes downstream, the speed is x + 6;
So, the time taken by the boat each trip are:
The equation that calculates the required time (x) is:
This gives
Expand
Evaluate the like terms
Divide through by 9
Collect like terms
Factorize
Solve for x
x cannot be negative.
So, we have:
Hence, the boat must go 9mph on the lake in order for it to serve the ferry operator's needs
Read more about speed and distance at:
Answer: the speed of the boat on the lake is 9 mph
Step-by-step explanation:
Let x represent the speed of the boat on the lake or in still water.
The speed of the current in a river is 6 mph. This means that if the boat goes upstream against the speed of the current, its total speed would be (x - 6)mph. If the boat goes downstream against the speed of the current, its total speed would be (x + 6)mph.
Time = distance/ speed
Every day, his route takes him 22.5 miles each way against the current and back to his dock, and he needs to make this trip in a total of 9 hours. This means that the time taken to travel upstream is
22.5/(x - 6). The time taken to travel downstream is
22.5/(x + 6)
Since the total time is 9 hours, it means that
22.5/(x - 6) = 22.5/(x + 6)
Cross multiplying, it becomes
22.5(x + 6) + 22.5(x - 6) = 9
Multiplying through by (x + 6)(x - 6), it becomes
22.5(x - 6) + 22.5(x + 6) = 9[(x + 6)(x - 6)]
22.5x - 135 + 22.5x + 135 = 9(x² - 6x + 6x - 36)
22.5x + 22.5x = 9x² - 324
9x² - 45x - 324 = 0
Dividing through by 9, it becomes
x² - 5x - 36 = 0
x² + 4x - 9x - 36 = 0
x(x + 4) - 9(x + 4) = 0
x - 9 = 0 or x + 4 = 0
x = 9 or x = - 4
Since the speed cannot be negative, then x = 9
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then do:
denominator stays same - if improper fraction change to mixed #
1 times 7 = 7 + 3 times 2 = 6
2 times 7 = 14 7 times 2 = 14
6 + 7 over 14 is 13 over
14
if possible and needed - change to simplest form