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arsen [322]
3 years ago
9

Barbara use distributive property to write an expression that is equivalent to 7d+63. Her work is shown below. The greatest comm

on factor is 7 so 7d +63=7(d+63)
What was Barbara’s error?
A-Barbara wrote(d+63) Instead of(63d)
B-Barbara wrote (d+63) Instead of (d+9)
C-Barbara wrote (d-+63) instead of (d+56
D-Barbara wrote (d+63) instead of (10d)
Mathematics
2 answers:
frozen [14]3 years ago
8 0

Answer:

B-Barbara wrote (d+63) Instead of (d+9)

Step-by-step explanation:

Since the greatest common factor is 7 it simply mean 7 is divisor of the expression 7d +63 and not just a divisor of 7d.

=(7d+63)/7

= (d + 9)

Expression 7(d+63) = (7*d + 7*63) = 7d + 441 which is not equal to 7d +63

So Barbara should have writen 7d +63 = 7(d+9) instead.

eduard3 years ago
4 0

Answer:

Step-by-step explanation:

i think its b

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1 hour and 16 minutes

Step-by-step explanation:

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2 years ago
Need math help please
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7 0
2 years ago
line y = 2x+1 is transformed by a dialation with a scale factor of two and centered at (0,-4). what is the equation of the image
Gekata [30.6K]

Answer: y = 2x + 6

Step-by-step explanation:

Here the equation of line,

y = 2x + 1

y-intercept of the line is, (0, 1)

And, the slope of the line is 2.

Since, If a point (x,y) is dilated by a scale factor k about a point (a,b),

Then transformed point are get by,

(x,y)\rightarrow (k(x-a)+a, k(y-b)+b)

Thus, The transformed point of point (0,1) when dilation is occur by the scale factor 2 about the point (0,-4),

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(0,-4)\rightarrow (0, 6)

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5 0
3 years ago
I DONT KNOW WHAT IS 89090x908
never [62]

Answer:

80 893 720

Step-by-step explanation:

hope dis helps!!!!

6 0
2 years ago
PLEASE I NEED HELP ​
NeTakaya

Answer:

D) y=-1/2x+4

Step-by-step explanation:

D) y=-1/2x+4

In order to be parallel, it has to have the same slope (-1/2).  Also, if you plug in (-2,5) for x and y, it does pass through those coordinates.

8 0
3 years ago
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