8. alysha has a collection of dime and nickel rolls that she'd like to take to the bank. each dime roll has 50 dimes and each nickel roll has 40 nickels.
a) write an equation to represent the total value of
b) if the total value of the coins is $71 and she has 9 rolls of dimes, how many does she have?

See explanation

Step-by-step explanation:

Let x be the number of dime rolls and y be the number of nickels rolls.

Each dime roll has 50 dimes, then x dime rolls are worth cents or $5x.

Each nickel roll has 40 nickels, then y nickel rolls are worth cents or $2y.

A. The total value of Alysha's rolls is

or

B. If the total value of the coins is $71 and she has 9 rolls of dimes, then x = 9 and

Alysha has 13 nickel rolls.

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.

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step-by-step explanation:

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