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Gekata [30.6K]
3 years ago
15

The mark obtained by 20 students in mathematics in the examination are given below.

Mathematics
2 answers:
Phantasy [73]3 years ago
8 0
I honestly just need the points thankyou
ValentinkaMS [17]3 years ago
7 0

Answer:

Step-by-step explanation:

class interval

  1. 9-19
  2. 20-29
  3. 30-39
  4. 40-49

Frequency

  1. 5
  2. 7
  3. 6
  4. 2

tally

  1. IIIII
  2. IIIII   II
  3. IIIII   I
  4. II

Note: the fifth tally marks crosses the first 4 marks

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Find the value of r so that the line through (8,r) and (4,5) has a slope of -4
Ratling [72]

Answer:

r = - 11

Step-by-step explanation:

Calculate the slope m using the slope formula and equate to - 4

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (4, 5) and (x₂, y₂ ) = (8, r)

m = \frac{r-5}{8-4} = \frac{r-5}{4} = - 4 ( multiply both sides by 4 )

r - 5 = - 16 ( add 5 to both sides )

r = - 11

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3 years ago
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Andrei [34K]

Answer:

I need points

Step-by-step explanation:

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3 years ago
Evaluate the expression for x = 3, y=13 , and z = 5.
hoa [83]

Answer:

-437

Step-by-step explanation:

x=3,y=13,z=5

12x-3y4x-z

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5 0
3 years ago
Which value of x makes the equation 1.25(6x - 20) = 50 true?
bixtya [17]
D. X = 10

6x-20= 40

6x=40+20

6x=60

X=10
4 0
3 years ago
Help me please 10 ////////////////
madam [21]

Answer:

part A is 120

Step-by-step explanation:

6 × 20 = 120

part B

3 0
3 years ago
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