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aleksklad [387]
2 years ago
7

What's the answer for this? CLASS 6 MATHS I NEED HELP ASAP!!!​

Mathematics
1 answer:
devlian [24]2 years ago
7 0

Answer:

20:

3 5/12 or 41/12

21:

-9 5/8 or -77/8

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Find a.b. a=[6,-2,3], b=[2,5, -1]
kotykmax [81]

Answer:

a.b=[-1]

Step-by-step explanation:

This is a dot product of a and b

a.b =[6,-2,3].[2,5, -1] = [12-10-3] =[-1]

7 0
3 years ago
*Awarding Brainliest to first responder with the correct answer!*<br><br> What is m∠CDJ ?
Bogdan [553]

Answer:

Step-by-step explanation:

Angle ADC and angle CDJ are complementary.  That means that they add up to equal 90 degrees.  Therefore,

4x + 3x - 8 = 90 and

7x = 98 so

x = 14

Sub in a 14 for x in 3x - 8:

3(14) - 8 = 34

Angle CDJ = 34 degrees

5 0
3 years ago
Yan has already finished 3/5 of the 45 math problems he was assigned today. Each math problem took him 1 4/5 of a minute to comp
kobusy [5.1K]

Answer:

He will finish the rest of the problems in 32.4 minutes.

Step-by-step explanation:

Since we are given that Yan has completed 3/5 of 45 problems i.e.

\frac{3}{5}*45

27

Thus he has completed 27 problems

Remaining no. of problems are 45-27 = 18

Since he complete each problem in minutes = 1\frac{4}{5} =\frac{9}{5} =1.8

So, he completes 18 problems in minutes = 18 *1.8 = 32.4 minutes

Hence , He will finish the rest of the problems in 32.4 minutes.


3 0
3 years ago
Where does the graph of the linear equation, y = 1/2 x - 3, cross the y-axis?
makvit [3.9K]

negative 2 is where it crosses



4 0
3 years ago
Read 2 more answers
If you draw a card with a value of 4 or less from a standard deck of cards, I will pay you 165$ if not your pay me $45. (Aces ar
jekas [21]

Answer: The required expected value is $3.46.

Step-by-step explanation:

Since we have given that

Number of value of 4 or less are

2,3,4

So, there are 12 in numbers.

So, probability would be

\dfrac{12}{52}

Since Aces are considered as the highest card in the deck.

So, remaining probability would be

\dfrac{40}{12}

Amount paid or value of 4 or less = $165

Amount not paid for other case = $45

So, the expected value would be

\dfrac{12}{52}\times 165-\dfrac{40}{52}\times 45\\\\=\dfrac{1980}{52}-\dfrac{1800}{52}\\\\=\dfrac{180}{52}\\\\=3.46

Hence, the required expected value is $3.46.

7 0
3 years ago
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