The answer is y=12.75x
12.75(2)= 25.5
12.75(4)= 51
12.75(5)= 63.75
12.75(8)= 102
9514 1404 393
Answer:
Step-by-step explanation:
If all of Brent's coins were pennies, their value would be 1.63. The value is actually 4.42 -1.63 = 2.79 more than that. Replacing a penny by a dime increases the value by .09. Hence there must be 2.79/.09 = 31 replacements.
Brent has 31 dimes and 132 pennies.
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<em>Solution using an equation</em>
You can write an equation that solve the problem in basically the same way. Let the variable represent the number of coins of highest value: d = dimes. Then the value (in cents) of the collection is ...
1(163-d) +10d = 442
9d +163 = 442 . . . . . . . . . . simplify (note 9 is the difference in value; 163 is the value of all pennies)
9d = 442 -163 = 279 . . . . . . subtract 163
d = 279/9 = 31 . . . . . . . . . . divide by 9
Brent has 31 dimes and 163-31 = 132 pennies.
29*2.4-36.5= 33.1 hrs before the freight train cought up.
Step-by-step explanation:
One number to the next is multiplied by -3, the first term is -4, second 12, third -36, fourth 108, keep going
The answer is the third choice
-9,-3