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3 years ago

What is the Area of this composite polygon

Mathematics

1 answer:

melomori [17]3 years ago

6 0

Answer:

136

Step-by-step explanation:

I LOVE DOING THESE

16x7=112

8x6=48

48x0.5=24

112+24=136

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Kelly practiced her flute for 30 minutes a day for 9 days. How many total minutes did she practice?

Lesechka [4]

she practice 270 minutes

7 0

3 years ago

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What is the discriminant of 9x^2+=10x

prisoha [69]

9x^2-10x=0
D= b^2-4ac
b=-10
a=9
c=0
D=(-10)^2-4*9*0=10^2-0=100

4 0

3 years ago

A past survey of students taking a standardized test revealed that % of the students were planning on studying engineering in c

Angelina_Jolie [31]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The 95% confidence interval is $-0.00870$

Step-by-step explanation:

From the question we are told that

The first sample size is $n_1 = 1068000$

The first proportion $\r p_1 = 0.084$

The second sample size is $n_2 = 1476000$

The second proportion is $\r p_2 = 0.092$

Given that the confidence level is 95% then the level of significance is mathematically represented as

$\alpha = (100 - 95)\%$

$\alpha = 0.05$

From the normal distribution table we obtain the critical value of $\frac{ \alpha }{2}$ the value is

$Z_{\frac{\alpha }{2} } =z_c= 1.96$

Now using the formula from the question to construct the 95% confidence interval we have

$(\r p_1 - \r p_2 )- z_c \sqrt{ \frac{\r p_1 \r q_1 }{n_1} + \frac{\r p_2 \r q_2 }{n_2} }$

Here $\r q_1 = 1 - \r p_1$

=> $\r q_1 = 1 - 0.084$

=> $\r q = 0.916$

and

$\r q_2 = 1 - \r p_2$

=> $\r q_2 = 1 - 0.092$

=> $\r q_2 = 0.908$

$(0.084 - 0.092 )- (1.96)* \sqrt{ \frac{0.092* 0.916 }{1068000} + \frac{0.084* 0.908 }{1476000} }$

$-0.00870$

3 0

3 years ago

Sophie pays m dollars to rent a car for the weekend. On the drive

antiseptic1488 [7]

Answer:

1/2m+25

Step-by-step explanation:

if melody pays 1/2 then sophie pays 1/2 too and then she also spends 25 so you just have to add them together.

7 0

3 years ago

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Solve this inequality: 14 <-7x

solmaris [256]

Answer:

x > -2

Step-by-step explanation:

14 <-7x

or, 14/-7=-7x/-7

or, -2 < x

4 0

3 years ago