OPEN ENDED QUESTION
1 answer:
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X - the number of questions he answered correctly
y - the number of questions he answered incorrectly
There were 40 questions on the test.
The correct answers were given 5 points each, the incorrect answers were given -2 points each. He made a score of 95.
Set 40-x and (-95/2)+(5/2)x equal to each other:
Johnny answered correctly 25 questions.
y - the number of questions he answered incorrectly
There were 40 questions on the test.
The correct answers were given 5 points each, the incorrect answers were given -2 points each. He made a score of 95.
Set 40-x and (-95/2)+(5/2)x equal to each other:
Johnny answered correctly 25 questions.
Answer:
The situation that represents this situation is:
Step-by-step explanation:
The amount of time t needed to assemble the set is inversely proportional to the number people n working.
This means that:
In which k is the constant of proportionality.
Twelve people can assemble the set in 5 hours.
This means that for . We use this to find k.
Write an equation to represent the situation.
There are 5 pennies in a nickel, and 10 pennies in a dime. Now in $3.90 there are 390 pennies.
n = number of nickels in the pile
d = number of dimes in the pile
we know the pile has 55 coins, therefore whatever "n" and "d" are, we know that n + d = 55.
now, "n" is how many nickel coins are there, how many pennies is it in total? well, 5 pennies to a nickel, for "n" nickels, will then be 5(n) or 5n.
and "d" is how many dime coins are there, so therefore in "d" coins, there are 10(d) pennies, or 10d.
we also know the total amount of pennies is 390, therefore 5n + 10d = 390.
how many nickel coins are there anyway? well, n = 55 - d.
n = number of nickels in the pile
d = number of dimes in the pile
we know the pile has 55 coins, therefore whatever "n" and "d" are, we know that n + d = 55.
now, "n" is how many nickel coins are there, how many pennies is it in total? well, 5 pennies to a nickel, for "n" nickels, will then be 5(n) or 5n.
and "d" is how many dime coins are there, so therefore in "d" coins, there are 10(d) pennies, or 10d.
we also know the total amount of pennies is 390, therefore 5n + 10d = 390.
how many nickel coins are there anyway? well, n = 55 - d.