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stira [4]
3 years ago
9

Let A be a 4 x 5 matrix and Let B be a 4 x 4 matrix. Suppose you were asked to multiply matrix A times matrix B. When multiplied

the resulting solution of multiplying matrix A times matrix B will be a 4x 4 matrix.
a. True
b. False
Mathematics
1 answer:
VMariaS [17]3 years ago
8 0

Answer:

b. false

Step-by-step explanation:

when multiplying matrixes the number of columns of the first matrix must be equal as the number of rows of the second matrix, and since here matrix A has 4 columns but matrix B has 5 rows they can't be multiplied

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a school has 415 third grade and 338 second graders how many more third graders are there than second graders?
Alika [10]

Answer:

There are 77 more third graders than there are second graders.

Step-by-step explanation:

You just have to subtract 338 from 415 to get your answer.

6 0
3 years ago
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Please help me with 9 I really need it
MissTica

Answer:

605 boys

Step-by-step explanation:

If the ratio of boys to girls is 5:7

and there are 847 girls

we can plug this value into the ratio by doing something like:

5:7

= 5/7

= x/847

Because the ratio has to be the same, we can substitute x for the number of boys and solve by the cross method or whatever you guys call it.

5            x

---   x    ------

7          847

The x in the middle is just to show the direction you are multiplying.

the 5 is multiplied by the 847 and the 7 is multiplied by x.

847 * 5 = 4,235

4,235  divided by 7 is 605

605 is your answer.

The cross method can be used in most situations.

* is used to represent multiplication btw

4 0
3 years ago
PLZ HELP ME I NEED HELP PLZ HELP 20 POINTS
ollegr [7]
The answer is A because the same rule applies
7 0
3 years ago
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Help plz : 4x-2(x-3)=10+(-9)
Dominik [7]
Distribute -2(x - 3)

4x - 2x + 6 = 10 + -9

Simplify

2x = -5

x = -2.5
7 0
4 years ago
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Find two numbers the exact answer is between 8×684
ollegr [7]
 8 * 684 = 5472

it is in between 5471 and 5473
8 0
3 years ago
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