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marishachu [46]
3 years ago
5

If there are 13 girls in the class and 7 boys what percent of the students are girls???

Mathematics
1 answer:
Mumz [18]3 years ago
3 0

Answer is 13 i hope this helps like it

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Consider the vector add = a + b = [13 12 11 10 10] and sub = a - b = [-11 - 6 - 14 8]. Find the vector a and b.
prisoha [69]

Answer:

a = [1   3   5   7   9] and b = [12   9   6   3   1]

Step-by-step explanation:

The addition of two vectors a and b is defined as

a + b = [13   12   11   10   10]                .... (1)

The subtraction of two vectors a and b is defined as

a - b = [-11   - 6   - 1   4    8]                 .... (2)

After adding (1) and (2), we get

(a + b) + (a - b)= [13   12   11   10   10] + [-11   - 6   - 1   4    8]

On simplification we get

2a = [13-11   12-6   11-1   10+4   10+8]

2a = [2   6   10   14   18]

Divide both sides by 2.

a = [1   3   5   7   9]

Substitute the value of vector a in equation (1).

[1   3   5   7   9] + b = [13   12   11   10   10]

Subtract vector a from both sides.

b = [13   12   11   10   10] - [1   3   5   7   9]

On simplification we get

b = [13-1   12-3   11-5   10-7   10-9]

b = [12   9   6   3   1]

Therefore the vectors a and b are defined as a = [1   3   5   7   9] and b = [12   9   6   3   1].

4 0
3 years ago
A basketball team played 15 games and won 80% of them. If the team expects to play 30 games in all, how many more games must it
emmainna [20.7K]
So 80% of 15 games won equal 12 games won and 3 lost. This is because 15/10 = 1.5 and 1.5 x 8 =12.
For 30, you do the exact same thing but with 90% instead. 30/10 = 3. 3 x 9 = 27.
So they need to have won 27 games to get a 90% winning percentage out of 30 games.
But since the question asks how many MORE games they need to play, it'll be 27-12 = 15.
So they need to win 15 more games to get a 90% winning percentage
5 0
4 years ago
Write an algebraic expression to represent the phrase the different between two times b & 11
svet-max [94.6K]

are you sure you wrote that right?????

6 0
3 years ago
Help please ASAP 11-16 with step by step explanation please help
navik [9.2K]

Answer:

11.  135 mph

12. 40 Oz

13.  50 m

14.  2500

15.  240

i don't know 16

Step-by-step explanation:

11.  27 x 5= 135 mph

12. 24 : 6 x 10= 40 Oz

13.  1.5 : 3 x 100= 50 m

14. 40% = 1000

     10% = 250 (1000 : 4 = 250)

     100%= 2500 (250 x 10 = 2500)

15.  75% -> 25% = : 3

      180 : 3 = 60

      180 + 60 = 240

8 0
3 years ago
A truckload of cement weighs approximately 3
dexar [7]

Answer:

Step-by-step explanation:

5 0
3 years ago
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