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kipiarov [429]
3 years ago
12

Which of the following quantities is a variable?

Mathematics
1 answer:
Dmitry [639]3 years ago
6 0

Answer:

Length of a Brooklyn Bridge

Step-by-step explanation:

A variable is an unfixed pattern that is liable to change at any time

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Bella and Heather put some money into their money boxes every week. The amount of money (y), in dollars, in their money boxes af
ss7ja [257]

ANSWER

10 weeks, $310


EXPLANATION

We have a system of linear equations as both equations need to be satisfied by the same ordered pair (x,y):


y = 25x + 60

y = 30x + 10


We can solve this by substitution. Since y is equal to 25x+60, we can substitute in 25x + 60 for y in the equation y=30x+10


y = 30x + 10

25x + 60 = 30x + 10


Subtract 25x from both sides


60 = 5x + 10

Subtract 10 from both sides and then divide both sides by 5


50 = 5x

x = 10


x represents time in weeks, so 10 weeks.


Find y, the amount of money, by substituting x=10 into either equation.

If we use y = 30x + 10, then


y = 30x + 10

y = 30(10) + 10

y = 300 + 10

y = 310


y = 310 implies $310 so the answer is 10 weeks, $310.

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3 years ago
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How do I do this puzzle
irga5000 [103]
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3 years ago
Square root of quantity 125÷8 times square root of quantity 5÷2
Archy [21]

Answer:

6.24999999998 or 6.3

Step-by-step explanation:

8 0
4 years ago
Can u teach me the slope formula<br> DONT COPY AND PASTE<br> for 30 pnts
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4 years ago
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Write and solve a problem involving money that can be solved with a mu<br>ltiplication equation
Lelu [443]
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3 years ago
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