What's Wrong With 'Em?
Is this correct, why or why not?
5 (1+4h) + 2h = 275 + 20h + 2h = 27
27h = 27
h=1
Not correct, combined non like terms.
22h = 22
h=1
Equivalent? yes or no?
2x - 5 =15
2x = 10
No
Priya is buying raisins and almonds to make trail mix. Almonds cost $5.20 per pound and raisins cost $2.75 per pound. Priya spent $11.70 buying almonds and raisins. The relationship between pounds of almonds, a, pounds of raisins, r , and the total cost is represented by the equation ?
5.20a + 2.75r = 11.70
Is this correct ? Why or why not?
2 (x+1) +1 =5
2(x+1) = 4
(x+1) = 2
x = 3
No, you are suppose to subtract 1 from 2 instead of add it. x should equal 1
Equivalent? yes or no?
3x -12 = 24
3x = 36
15x - 60 = 120
Yes they are.
1st one: added 12
2nd one: multiplied the whole equation by 3
Here is a linear equation in two variables:
2x +4y -31 = 123
Solve for x.
x = 77 - 2y
Where is the error?
1) 2(x+9) = 4(x+7)+2
2) 2x + 18 = 4x + 28 +2
3) 2x + 18 = 4x + 26
4) -8 = 2x
5) -4 = x
Step 3, 28 and 2 were suppose to be added and they were subtracted.
What is an equivalent fraction?
3a + 6 = 15
3a = 9
a + 2 = 5
1/3 a = 1
Here is a linear equation in two variables:
2x +4y -31 = 123
Solve for y.
y = 38.5 - 1/2 x