Expressions
3x + 4y + 2x + 3y
5x + 7y
3x + 4 = 25
x = 7
In the equation y = kx, which letter represents the constant of proportionality?
k
0.15
An incomplete equation is shown below.
-6.8 + 6.4 + _____ = 0
Which expression, when placed in the blank, makes this equation true?
A. -4.3 + 4.7 B. -6.5 + 6.7
C. -4.3 + (-4.7). D. -6.5 + (-6.7)
A
4(2n + 3) + 2(n + 1)
10n + 14
What symbol is this? <
Less than
Is it proportional?
x y
2 10
3 15
4 20
yes
What is 20% of 80?
16
Which expression is equivalent to (-0.3) + 1.5?
A (-0.3) + (-1.5). B (-1.5) + (0.3)
C 1.5 - 0.3 D 0.3 - 1.5
C
3x + 1 - 5x - 4
-2x - 3
Write an equation:
Sami bought a drink for $1.50 and some bags of chips for $0.50 each. He spent a total of $4.00.
Is it proportional?
x y
2 20
4 30
6 40
no
0.85x
What is the product of (-6)(-1 1/2)?
9
4(n + 1) - 2(n - 3)
2n + 10
3x - 4 > 11
x > 5
The graph of a proportion must have what two things?
straight line through the origin (0, 0)
What is the percent increase from 24 to 30?
25%
The temperature at 8:00 am was -7*F. At 3:00 pm, the temperature had risen to 8*F. What was the change in temperature, in degrees, from 8:00 am to 3:00 am?
15
3x(2y - 3) - 3y(2x + 5)
-9x - 15y
Gia had $30 to spend at the store. If she buys a shirt that costs $11 and spends the rest of her money on $5 pins, what is the greatest number of pins she can buy?
3 pins
What is another term for the constant of proportionality?
unit rate
A shirt that normally costs $45 is on sale for 25% off. What is the final price of the shirt?
$33.75
Andrea had a gift card with a balance of $25.00. She makes a $25.00 purchase using the gift card. What will be the balance of the gift card after this transaction?
zero