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julsineya [31]
3 years ago
8

I’m so confused I don’t know how to subtract fractions. What is 2+2-1 2/3

Mathematics
2 answers:
Alexxandr [17]3 years ago
7 0

Answer:

its 7/3 or you could put 2 1/3

Step-by-step explanation:

malfutka [58]3 years ago
5 0

Answer:

2 \frac{1}{3}

Step-by-step explanation:

To subtract fractions you convert the whole numbers into fractions.

2 + 2 = 4

4 - 1 \frac{2}{3}

We can convert 4 to \frac{12}{3}because 12 divided by 3 equals 4. We can convert

1 \frac{2}{3} to  \frac{5}{3}  because 5 divided by 3 equals 1 \frac{2}{3}

We can now subtract our converted fractions:

\frac{12}{3}  minus \frac{5}{3}  = \frac{7}{3}

So our answer is 7/3.

This simplifies to:

2 \frac{1}{3}

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Which coefficient matrix represents a system of linear equations that has a unique solution ?
finlep [7]

Answer:

Option C

Step-by-step explanation:

We are given a coefficient matrix along and not the solution matrix

Since solution matrix is not given we cannot check for infinity solutions.

But we can check whether coefficient matrix is 0 or not

If coefficient matrix is zero, the system is inconsistent and hence no solution.

Option A)

|A|=\left[\begin{array}{ccc}4&2&6\\2&1&3\\-2&3&-4\end{array}\right] =0

since II row is a multiple of I row

Hence no solution or infinite

OPtion B

|B|=\left[\begin{array}{ccc}2&0&-2\\-7&1&5\\4&-2&0\end{array}\right] \\=2(10)-2(10)=0

Hence no solution or infinite

Option C

\left[\begin{array}{ccc}6&0&-2\\-2&0&6\\1&-2&0\end{array}\right] \\=2(36-2)=68

Hence there will be a unique solution

Option D

\left[\begin{array}{ccc}5&10&5\\4&1&4\\-1&-2&-1\end{array}\right] \\=2(10)-2(10)=0=0

(since I row is -5 times III row)

Hence there will be no or infinite solution

Option C is the correct answer



4 0
3 years ago
Read 2 more answers
I need help with something in school.
Kamila [148]

Answer:

what do you need help with

Step-by-step explanation:

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6 0
2 years ago
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Kathi and Robert Hawn had a pottery stand at the annual Skippack Craft Fair. They sold some of their pottery at the original pri
grigory [225]

Answer:27 pieces were sold at the original price.

63 pieces were sold at the new price

Step-by-step explanation:

Let x represent the number of pieces of pottery that was sold at the original price.

Let y represent the number of pieces of pottery that was sold at the new price.

They sold some of their pottery at the original price of​ $9.50 for each​ piece. This means that the amount that they got from selling x pieces of pottery at the original price would be 9.5x

They later decreased the price of each piece by​ $2. This means that the new price was 9.5 - 2 = $7.5

This means that the amount that they got from selling x pieces of pottery at the new price would be 7.5y

If they sold all 90 pieces and took in ​$729​, then the equations are

x + y = 90

9.5x + 7.5y = 729 - - - - - - - - - -1

Substituting x = 90 - y into equation 1, it becomes

9.5(90 - y) + 7.5y = 729

855 - 9.5y + 7.5y = 729

- 9.5y + 7.5y = 729 - 855

- 2y = - 126

y = - 126/- 2 = 63

Substituting y = 63 into x = 90 - y, it becomes

x = 90 - 63 = 27

6 0
3 years ago
A pizza place near your office has small cheese pizzas for $4 and small pepperoni pizzas for $5. You are going to pick up pizzas
Lyrx [107]
It's B because 5 x 4 = 20 and 9 x 5 = 45
When you add them together you get 65
5 0
3 years ago
Find the unit rate ( miles per gallon ): 50 miles on 2 1/2 gallons.
postnew [5]
Hello! To find the unit rate in miles per gallon, all you have to do is divide the amount of miles by the amount of gallons. 2½ is 2.5 in decimal form. 50/2.5 is 20. There. The unit rate is 20 miles per gallon.
7 0
3 years ago
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