Let's Substitute - Evaluating Expressions
1a for a = 700
700
5x+7x
12x
Solve d=rt for t
t=d/r
Solve:
x/5 = 10
x = 50
If Stacy is buying shirts for $4 each and the shipping is a flat rate of $2, when writing the equation, will the variable "x" go next to the 2 or the 4?
4x - 5 for x = 4
11
4x2+8x-5x2
-x2+8x
Solve M = T - R for T
T = M + R
10m-4=36
m=4
Jaymee with to the Philippines and exchanged her $50 for pesos. If the conversion rate is 48.25 pesos per 1 american dollar, how many pesos did she get?
2a + 5 for a = 3
11
8(x+5)-x
7x+40
Solve 2a + 2b = c for b
b = (c - 2a)/2
Solve:
4(2x-5)=-2(4x-10)
Hint: the answer is a fraction
x = 5/2
If you work at Journey's, you get paid for commision and your hourly wage. You get paid $10 an hour and on average, you make $78 of commission a week. Write an expression that represents the amount of money you make (pre-tax) if you work x amount of hours in the week.
3(2y - 1) + 6 for y = 2
15
5(x+4)+7(2x-1)
19x+13
Solve for a:
C=1/2 ab2
A=(2c)/b2
Solve:
0.8y+13.1=1.2y+7.6
Hint: the answer is a decimal
x = 13.75
Stephanie wants to buy Hello Fresh for her meals for the year. It costs $25 for each meal in the week with a flat rate shipping cost of $8 for the week. Write an equation (do not distribute) for the cost of her meals for the YEAR (there are 52 weeks in a year). The number of meals she buys each week should be represented with an "x" and the total cost should be a "c"
52(25x+8)=C
n/4 + 2n - 3 for n = 8
15
-2(x-6)-3(x+1)
-5x+9
Solve v2 = u2 + 2as for s
s = (v2 - u2)/2a
Solve:
2x+(15-4x)=10-(3x+6)
x = -11
In 2013, Raymond had chickens that produced an average of 32 eggs a week. In 2014, all of his chickens produced an average of 36 eggs a week (he got more chickens!). If this trend continues, how many eggs, on average, will his flock of chickens produce by 2021?
64 eggs