In a test, the 10 students in group 1 get a mean score of 43%.

1 answer:

7 0

The mistake is that he forgot that the groups were not equal! one group was bigger than another, but he treated them as if they were equal

the real mean is calculated like this:

(43*10+15*57)/25=

(1285)/25=51.4

the real mean was 51.4

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Which inequality is shown in this graph

Katena32 [7]

ANSWER

$y \leqslant - 2x - 2$

EXPLANATION

The boundary line passes through (-2,2) and (0,-2).

The slope of this line is

$m = \frac{ - 2 - 2}{0 - - 2}$

$m = \frac{ - 4}{2} = - 2$

The y-intercept is , c=-2.

The slope-intercept form of this line is given by;

$y = mx + c$

We substitute values to obtain;

$y = - 2x - 2$

Since the lower half-plane is shaded the required inequality is

$y \leqslant - 2x - 2$

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Nookie1986 [14]

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4 years ago

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Eight times the sum of 5 and a number is less than 56.

Gwar [14]

8• (5+x) < 56
That is the equation

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4 years ago

Is 5/6 close to 1, 0, or 1/2. Explain

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