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netineya [11]
3 years ago
14

Fine the difference (2ab-5a-7)-(-5ab-7)

Mathematics
1 answer:
serg [7]3 years ago
5 0

Answer:

7ab - 5a

Step-by-step explanation:

For addition and subtraction this type of variable we should always keep one thing in mind that, we can only add or subtract only those digits whose variables are the same.

Solving given equation step to step:

(2ab - 5a - 7) - (-5ab - 7)

Opening the bracket first,

⇒ 2ab - 5a - 7 - (- 5ab) - (- 7)

⇒ 2ab - 5a - 7 + 5ab + 7

Now, taking same variables digits together

⇒ (2 + 5)ab - 5a - 7 + 7

⇒ 7ab - 5a - 0

⇒ 7ab - 5a

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If A and B are 7 x 2 matrices, and C is a 4x7
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Answer:

  A, B, D, F

Step-by-step explanation:

Matrix operations require that the matrix dimensions make sense for the operation being performed.

Matrix multiplication forms the dot product of a row in the left matrix and a column in the right matrix. That can only happen if those vectors have the same dimension. That is the number of columns in the left matrix must equal the number of rows in the right matrix.

Matrix addition or subtraction operates on corresponding terms, so the matrices must have the same dimension.

The transpose operation interchanges rows and columns, so reverses the dimension numbers. It is a defined operation for any size matrix.

<h3>Defined operations</h3>

A. CA ⇒ (4×7) × (7×2) . . . . defined

B. B -A ⇒ (7×2) -(7×2) . . . . defined

C. B -C ⇒ (7×2) -(4×7) . . . undefined

D. AB' ⇒ (7×2) × (2×7) . . . . defined

E. AC ⇒ (7×2) × (4×7) . . . undefined

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5 0
1 year ago
James and his family spend a morning picking peaches. They fill several bags. This line plot shows the weight of each bag.
Vladimir [108]

Answer:

3/8

Step-by-step explanation:

5 0
2 years ago
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ehidna [41]
The correct answer is C
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3 years ago
40x divided by 10=28
docker41 [41]

Answer:

x = 7

Step-by-step explanation:

40x ÷ 10 = 28

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7 0
3 years ago
Read 2 more answers
Determine the most probable next term in each list of numbers.
zloy xaker [14]

Answer:

23. 216
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