Equation/Expression/Inequality
Is the following an expression, equation or inequality and how do you know?
The product of four and x is eight.
Equation, because it has the total/ says "is".
Which value of m will make the inequality true?
m + 10 > -110
m > -120
Stephanie is baking some cookies. The recipe calls for 8 cups of flour. She already put in 3 cups, how many more cups does she need to add?
On your desk, explain why you picked that answer.
A. 3 + c =8
B. 3 -c = 8
C. c -3 = 8
D. 8 + c =3
A. She has a total of 8 cups. So she would add the cups she has to the cups she still needs.
Solve the following:
10x - 20 =70
x = 9
What value of p would make the inequality true?
-4p < 48
p > -12
Is the following an expression, equation or inequality and how do you know?
Ten plus z is less than negative two.
Inequality, it has "less than".
Which value of j would make the equation true?
5j = -45
j = -9
How many packs of PS4 games can you buy with 225 if one pack cost $15?
On your desk, explain how you picked your answer.
A. 15+p=225
B. 15p=225
C. 15-p=225
D. 15/p=225
The answer is B. The total is 225 and you would typically divide. The inverse of divide is multiply, so you would multiply the cost of one game by how ever many games you purchase to = 225.
Write and inequality that represents the following situation and graph on you desk.
I need at least $18 to go on the field trip.
x > ( with the line under) 18/ x is greater than or equal to 18. Closed circle shaded to the right.
Which value of x will make the following inequality true?
x + 10 < - 3
A. x > 7
B. x > -13
C. x < 7
D. x < -13
D. x < -13
Is the following an expression, equation or inequality and how do you know?
Five times p is minus four
Equation, it has the word "is"
Which value of x will make the equation true?
2x + 50 = -106
x = -78
Andrea wrote the inequality x/16 < 6. Which situation best represents the inequality. On your desk, explain how you know.
A. Andrea divided x pieces of paper among 16 students, and each student received less than 6 piece of paper.
B. Andrea placed x cards in 16 stacks, and there were no more than 6 cards in each stack.
C. Andrea separated x shirts into 6 stacks, and each stack had at least 16 shirts.
D. Andrea shared 16 markers with x classmates, and each classmate had less than 6 markers.
A. The inequality shows less than 6 and shoes x being divided by 16.
Which value of x will make the following inequality true?
x - 5 > 7
A. x < 12
B. x < -2
C. x > 12
D. x > -2
C. X > 12
Draw a model that represents 3x + 3 = 6
3 X's 3 positives is equal to 6 positives.
Which of the following doesn't belong and why?
A. The product of two and three is six.
B. 24 is the sum of 5 and x.
C. Half the product of j and 8.
D. Seven times n is 70.
C. Half the product of j and 8, because it doesn't say "is" or say the total.
Solve the following inequality and graph it on your desk.
-6c > 18
c < -3
C is less than -3, so open circle and shaded to the left.
Write an inequality that represents the following situation. Eddy is buying items from the book fair at school. He wants spends $23 on books and wants to by some posters that cost $2 each. What is the maximum amount of posters can he buy if he only had $30 to spend?
23 + 2p is less than or equal to 30.
Which of the following can be written as an inequality? On your desk, explain pick the answer and explain why the others aren't the answer.
A. Two times .56 is m.
B. Five less than 3 is two.
C. Four times n is at most 24.
D. Three less than twice h.
The correct answer is C.
A, has "is" which means equation because it gives the total.
B, has "is" which means equation because it gives the total.
D, doesn't have "is" or an inequality word
On your desk, model 3x = 9. Then solve for x.
3X's = 9 positives. X = 3.
What is the difference between an equation and an expression?
An equation gives a total or has the word "is", an expression does not.
On your desk, model x + 5 = 13.
You should have 1 X (long) and 5 positives is equal to 13 positives.
Write an equation that represents the following situation.
Aaron gets paid $13 per hour plus $50 in tips for delivering pizza. How many hours did Aaron work if he earned $167 for the day?
13x + 50 =167
Find the Solution to the Equation
- 4y - 14 = 10
y =-6
Nayeli got $56 for baby sitting for 4 hours. Write an equation that could be used to find x, the amount she was paid per hour.
4x=56