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Slav-nsk [51]
3 years ago
6

What is matrix subtraction?

Mathematics
1 answer:
solniwko [45]3 years ago
5 0
Two matrices may be added or subtracted only if they have the same dimension; that is, they must have the same number of rows and columns. Addition or subtraction is accomplished by adding or subtracting corresponding elements. For example, consider matrix A and matrix B. A =
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Kristen has been earning $150 per week by babysitting. She has been working hard to save 20% of each week's earnings. If she con
anyanavicka [17]

Answer:

it will take her 6 weeks

Step-by-step explanation:

150*.2=30

180/30=6

5 0
4 years ago
A model spaceship cost 15.99 before tax the tax on the model spaceship is 8%
marysya [2.9K]

15.99 * .8 = 12.79

15.99 + 12.79 = 28.78

the answer is $28.78 :)

4 0
3 years ago
Read 2 more answers
You need a mean of at least 90 points to advance to the next round of the touch-screen trivia. What score in the fifth game will
lianna [129]

Answer:

At least 98 is needed in the 5th game

Step-by-step explanation:

The missing parameters are:

Game\ 1 = 95

Game\ 2 = 91

Game\ 3 = 77

Game\ 4 =89

Mean = 90 at least

Required

The score in game 5 to make you advance

Mean is calculated as:

Mean = \frac{\sum x}{n}

So, we have:

Mean = \frac{95 + 91 + 77 + 89 + Game\ 5}{5}

Mean = \frac{352 + Game\ 5}{5}

The mean must be at least 90.

So, we have:

\frac{352 + Game\ 5}{5} \ge 90

Multiply both sides by 5

5 * \frac{352 + Game\ 5}{5} \ge 90 * 5

352 + Game\ 5 \ge 450

Make Game 5 the subject

Game\ 5 \ge450 - 352

Game\ 5 \ge 98

<em>At least 98 is needed in the 5th game</em>

4 0
3 years ago
If two mammoths take seven hours to walk eleven kilometres, how long would it take five mammoths to walk twenty two kilometres a
kati45 [8]
This is a funny one. teachers do this to try to confuse you with the numbers. first you need to find out what is important in the question.

2 mammoths, 7 hours, 11 kilometers.
&
5 mammoths, ? hours, 22kilometers.

the amount of mammoths do not matter, because each walk the same speed.

so you only need to look at this.

7 hours to go 11 kilometers
&
? hours to go 22 kilometers

fast answer is. it's twice the distance so it will take twice as long. 14 hours.

solve answer.

7×60min = 420min
420min ÷ 11 kilometers = 38.18181818min per 1 kilometer.

38.18181818 • 22 = 839.999999min round up 840.

840min ÷ 60min = 14 hours
5 0
4 years ago
How to solve x=5 grafting
iVinArrow [24]
So this one is pretty easy actually when x= a number you automatically know it'll be a vertical line cutting through the x axis. So for this problem (x=5) the line will be vertical and cut through the x axis. Hope this helps!
4 0
3 years ago
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