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Svetach [21]
3 years ago
8

Why do fractions need to have a common denominator before you add or subtract them?

Mathematics
1 answer:
FinnZ [79.3K]3 years ago
7 0
It’s so that the number of the pieces that you add or subtract is all the same size
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Lon is selling gift baskets at a craft fair. His costs are $75 for the table and $12 per basket. He sells each basket for $20.
Nadya [2.5K]

Answer:

1. B

2. D

Step-by-step explanation:

1. Lon's cost would be the $12 per basket times how many baskets he sells, in this case b plus the cost of the table. Lon's expression is 12b + 75

2. He needs a profit and the only way he could make that profit is if he sells more than 12.

20b > 12b + 75

20 (12) > 12 (12) + 75

240 > 140 + 75

240 > 215

6 0
3 years ago
Read 2 more answers
Simplify (6x^-2) (0.5x)^4
loris [4]

Answer:

(3/8)x^2

Step-by-step explanation:

Rewriting the given expression as follows simplifies the solution.  Note that 6x^(-2) could be written as:

   6

--------

 x^2

Also, (0.5x)^4 = 0.0625x^4.

Then we have:

6*0.0625*x^4        0.375

---------------------- = ------------ * x^(4-2), or     (3/8)x^2

        x^2                     1

Note that x^4 / x^2 = x^2.

6 0
3 years ago
A line passes trough the points(-5,2) and(10,-1). Wich is the equation of the line​
Contact [7]

Answer:

y= -(1/5)x +1

Step-by-step explanation:

Find slope:

(2+1)/(-5-10) = -1/5

Plug a point and slope into equation (I used -5,2):

y-2=-1/5(x+5)

Change it to slope-intercept form:

y-2=-1/5(x+5)

y-2=-1/5x-1

y=-1/5x+1

5 0
3 years ago
If f.) = 2x2 + 1, what is f(x) when x = 3?
Dafna1 [17]

Answer:

19

Step-by-step explanation:

f(x) = 2x^2 +1

Let x =3

f(3) = 2 (3)^2 +1

     = 2 *9 +1

     = 18 +1

     = 19

5 0
4 years ago
Line p and q are are perpendicular. If the slope of line m is 2 what is the slope of line q
jeka94

slope line of q= -1/2

perpendicular slopes are those that are opposite sign and reciprocal to the given slope

3 0
3 years ago
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