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2 years ago

Can someone help me with these pls

Mathematics

1 answer:

Troyanec [42]2 years ago

5 0

Answer:

subtract the area of the rectangle from the area of the triangle

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Birthdays of hockey players: In Malcolm Gladwell’s book "Outliers" he shares the work of Canadian psychologist Roger Barnsley, w

alexgriva [62]

Answer:

The P-value is 0.009.

Step-by-step explanation:

We are given that after debating whether this set of hockey players can be viewed as a random sample of hockey players, they decide to run a hypothesis test anyway to practice finding the P‐value.

We are given that the following hypothesis below;

Null Hypothesis, $H_0$ : p = 0.25

Alternate Hypothesis, $H_A$ : p > 0.25

Now, the test statistics that was used here for the above hypothesis would be;

T.S. = $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ~ N(0,1)

Also, the test statistics given to us is 2.37.

SO, the P-value of the test statistics is given by the following formula;

P-value = P(Z > 2.37) = 1 - P(Z $\leq$ 2.37)

= 1 - 0.99111 = 0.00889 ≈ 0.009

The above probability is calculated by looking at the value of x = 2.37 in the z table which has an area of 0.99111.

Therefore, the required P-value is 0.009.

6 0

3 years ago

Theresa has an umbrella stand at the beach. - All of them are blue, except for six. - All of them are yellow, except for six. -

Dmitry [639]

Answer:

3 Blue Umbrellas

Step-by-step explanation:

Given

$B \to Blue$

$Y \to Yellow$

$R \to Red$

From the question, we have:

$Y + R = 6$ ---- i.e. 6 are not blue

$B + R = 6$ ---- i.e. 6 are not yellow

$B + Y = 6$ ---- i.e. 6 are not red

Required

The number of blue umbrellas

Make B the subject in: $B + Y = 6$

$B = 6 - Y$

Substitute: $B = 6 - Y$ in $B + R = 6$

$6 - Y + R = 6$

Collect like terms

$R - Y = 6 - 6$

$R - Y = 0$

Rewrite:

$R = Y$

Substitute $R = Y$ in $Y + R = 6$

$Y + Y = 6$

$2Y = 6$

Divide both sides by 2

$Y=3$

Recall that: $B = 6 - Y$

$B = 6 - 3$

$B = 3$

3 0

3 years ago

What is the distance between points (3.3) and Wc-2, -3) Round to the nearest tenth if necessary.

Ivahew [28]

Answer:

7.81 u

Step-by-step explanation:

Given :-

Two points (3,3) and (-2,-3) is given to us.

And we need to find out the distance between the two points . So , here we can use the distance formula to find out the distance. As,

$:\implies$ D = √{(x2-x1)² + (y2-y1)²}

$:\implies$ D =√[ (3+2)² +(-3-3)²]

$:\implies$ D =√[ 5² +6²]

$:\implies$ D =√[ 25 +36]

$:\implies$ D = 61

$:\implies$ D = 7.81

<h3>Hence the distance between the two points is 7.81 units .</h3>

8 0

3 years ago

Please l need help with this system of equation. Solve the system by the method of substitution.

tatyana61 [14]

Y = ( 3 / 4 )x - 4 and ( 3 / 2 )x + ( 3 / 4 )y = 16 ;
Then, ( 3 / 2 )x + ( 3 / 4 )[ ( 3 / 4 )x - 4 ] = 16 ;
( 3 / 2 )x + ( 9 / 16 )x - 3 = 16 ;
( 3 / 2 )x + ( 9 / 16 )x = 19 ;
( 24 / 16 )x + ( 9 / 16 )x = 304 / 16 ;
24x + 9x = 304 ;
33x = 304 ;
x = 9.(21);
y = ( 3 / 4 ) × 9.(21) - 4 = 2.90 ;

5 0

3 years ago

PLEAS HELP ME!!!!!!!!!!!!!!!!Use a unit rate to find the unknown value. 52/13, 12/?

Nostrana [21]

Answer: 3

Step-by-step explanation:

52/13 can be simplified to 4. what do you have to put under 12 so it can simplify to 4? The answer is 3.

5 0

3 years ago