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3 years ago

Question 16 (5 points)

Mathematics

1 answer:

yulyashka [42]3 years ago

7 0

Answer:

9x -45

Step-by-step explanation:

-9(-x + 5)

Distribute

-9* -x +-9*5

9x -45

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Jojo bear bought 2 juices for 2.95 per juice and three bags of chips for 1.20 each. How much did he spend in total. Show work

stealth61 [152]

He spent $9.50 in total. To find this answer, you write the equation 2(9.95) + 3(1.20). You would distribute getting 5.90 + 3.60= $9.50.

5 0

3 years ago

In January of 2003(group 1), 1188 out of 1500 spots were bare ground (no vegetation). Find the sample proportion of bare ground

Nikitich [7]

Answer:

$n= 1500$ represent the random sample selected

$X= 1188$ represent the number of pots that were bare ground (no vegetation

$\hat p=\frac{X}{n}$

And replacing we got:

$\hat p=\frac{1188}{1500}= 0.792$

So then the sample proportion of bare ground spots is 0.792 for this sample

Step-by-step explanation:

We have the following info given from the problem:

$n= 1500$ represent the random sample selected

$X= 1188$ represent the number of pots that were bare ground (no vegetation)

And for this case if we want to find the sample proportion of bare ground spots we can use this formula:

$\hat p=\frac{X}{n}$

And replacing we got:

$\hat p=\frac{1188}{1500}= 0.792$

So then the sample proportion of bare ground spots is 0.792 for this sample

7 0

3 years ago

What would be the coordinate points for these? (I need 3 x and y) will give brainliest!!

Zarrin [17]

Answer:

Step-by-step explanation:

3x = -6

3 x -2 = -6

Your coordinates would be (-2,-6) if you are taking -2 as x and -6 as your y

5 0

4 years ago

Two radar stations 5.5 miles apart are tracking an airplane. The straight line distance

Vesnalui [34]

Answer:

19°

Step-by-step explanation:

I have attached an image showing this elevation.

From the image, let's first find the angle A by using cosine rule.

Thus;

8.1² = 5.5² + 13.1² - 2(5.5 × 13.1)cos A

65.61 = 30.25 + 171.61 - 144.1cos A

144.1cos A = 171.61 + 30.25 - 65.61

144.1cosA = 136.25

cosA = 136.25/144.1

cosA = 0.9455

A = cos^(-1) 0.9455

A = 19°

5 0

3 years ago

I really need help asap

AlekseyPX

Answer:

$a=3,b=7,c=-20$

Step-by-step explanation:

we are given equation as

$3x^2=20-7x$

Firstly, we will move all terms on left side

Subtract both sides by 20

$3x^2-20=20-7x-20$

$3x^2-20=-7x$

Add both sides by 7x

$3x^2-20+7x=-7x+7x$

$3x^2-20+7x=0$

$3x^2+7x-20=0$

now, we can compare it with quadratic equation

$ax^2+bx+c=0$

and we get

$a=3,b=7,c=-20$

3 0

3 years ago