Word Problems 1
Emily added 15 to a number instead of subtracting 15. If her answer was 45, what should her answer have been?
15
2a - a + 3a
4a
Is the following an equation or an expression-
4x + 3y − 2x + 6 + 5y
Expression
y - 3 = 7
y = 10
Sarah earns y dollars a day, and her coworker earns 50 dollars a day. If together they earn 130 dollars a day, how much does Sarah earn?
y + 50 = 130
y = 80
Sarah multiplied a number by 5 instead of dividing it by 5. If her answer was 25, what should her answer have been?
1
7x - 2y - 3x
4x - 2y
What are the variables in the following-
4x + 3y − 2x + 6 + 5y
x and y
2x + 5 = 11
x = 3
Lily had 15 books on her shelf. After buying some more books, she now has 25 books. How many books did Lily buy?
15 + b = 25
b = 10
James thinks of a number, he multiplies the number by 4 and then subtracts 7. His answer is 13. What was the number James first thought of?
5
2z x 3z
6z
What is the constant in the following -
4x + 3y − 2x + 6 + 5y
6
4x - 8 = 0
x = 2
The fee for a guided tour is $30 per group plus $12 per person.
Calculate the total fee if a group of 5 people takes the tour.
$90
Tom thinks of a number, he adds 8 to the number and then divides the result by 5. His answer is 6. What was the number Tom first thought of?
22
12 + 4c - 7 + 2c + 2c2
5 + 6c + 2c2
How many terms are in the following -
4x + 3y − 2x + 6 + 5y
5
2(x - 3) = 14
x = 10
The fee for a guided tour is $30 per group plus $12 per person.
On one day the tour company gave 3 tours, one with 3 people, and two with 4 people. How much money did they make?
$222
Sophie thinks of a whole number, she multiplies it by 4. She rounds the answer to the nearest 10, and the result is 30. Write all the possible numbers Sophie could have started with.
7 and 8
3y x 5z + 4x
15yz + 4x
What is the coefficient of the 3rd term -
4x + 3y − 2x + 6 + 5y
-2
3(x − 2) = 12/4
x = 3
A school group of 25 people visits a museum. There are 18 students and 7 teachers. The admission charges are: Students $4 and Teachers $10. The formula for the cost of admission is C=4s+10t, where s is the number of students and t is the number of teachers. Find the total cost for the group using the formula and show your working.
$142