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3 years ago

PLEASE HELP!! Show simple working out

Mathematics

1 answer:

motikmotik3 years ago

6 0

In order to estimate the mean, you need to choose a value to represent the number in each category of accidents. It is often convenient to use the middle value of the range.
.. (4*6 +10*10 +15*6 +20*9)/(6 +10 +6 +9) = 394/31 ≈ 12.7

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−5/6−3/2v+15/4+3/1v what is this equation fully simplified

Reptile [31]

Simplified the answer is 35/12+3v/2

6 0

3 years ago

For a sample of n = 30 scores, X = 45 corresponds to z = 1.50 and X = 40 corresponds to z = +1.00. What are the values for the s

TEA [102]

Answer:

Step-by-step explanation:

Here, it is given that the Z – score corresponding to the score X = 45 is 1.5 and the Z – score corresponding to the score X = 40 is...

Z = $\frac{X - M}{S}$

So:

1/ 1.5 = $\frac{45 - M}{S}$ and 1 = $\frac{40 -M}{S}$ . solve the both equations, we found out:

<=> S = 10

=> M = 30

Hence, mean is:

M = 45 -1.5S = 45 - 1.5 (10) = 30

3 0

2 years ago

2 x - 5 + 7 y - 3 = 9 x - 1 - y -8 Solve For X AND Y (SHOW WORK PLEASE)

Maru [420]

Answer:

$\large\boxed{\sf x = \frac{8y+1}{7} }$

$\large\boxed{\sf x = \frac{7x-1}{8} }$

Group the Variable's:

2 x - 5 + 7 y - 3 = 9 x - 1 - y -8

2x -9x + 7y +y = -1 -8 +5 + 3

-7x + 8y = -1

From this find x and y

For X

-7x + 8y = -1

-7x = -1 -8y

7x = 8y + 1

x = (8y +1)/7

For Y

-7x + 8y = -1

8y = -1 +7x

y = (7x -1)/8

3 0

1 year ago

Read 2 more answers

11 less than the product of a number and -4

denpristay [2]

Answer:

-4n - 11

Step-by-step explanation:

Step 1: Convert words into an expression

11 less than the product of a number and -4

(n * -4) - 11

-4n - 11

Answer: -4n - 11

If needed solve

-4n - 11 + 11 = 0 + 11

-4n / -4 = 11 / -4

n = -2.75

7 0

3 years ago

Hhelp me pleaseeeeee

svetlana [45]

A. Area = ½b × h

= ½ × 16 × 9

= 72

B. Area = b × h

= 26 × 18

= 468

C. Area = a²

= 11²

= 121

D. Area = ½(a+b) × h

= ½(6+21) × 8

= 108

Hope this helps :)

Please consider marking my answer the brainliest!

4 0

3 years ago