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3 years ago

Which of the following scenarios could be represented by the expression

Mathematics

1 answer:

wolverine [178]3 years ago

7 0

Answer:

Step-by-step explanation:

I am going with A......12x + 7y....x = # of adult and y = # of children.....adults cost 12 and children cost 7 <====

B doesn't make much sense....u could say x was for girls and y for boys...but u already know how many there are....so I am not sure what the x and y could stand for.

C does't make much sense either....x would have to be red marbles and y would have to be green marbles...but just like B, u already know how many there are....so not sure what x and y could stand for

D. wrong....because the box containing x 7 oz packages and y 12 oz packages.....12x + 7y....for this one to be correct, it would have to have x 12 oz packages and y 7 oz packages

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Plz help i need it!!

Umnica [9.8K]

Answer: c) 19,807

Step-by-step explanation:

$A=A_o\cdot e^{kt}\\\\\bullet A_o\text{ is the initial population}\\\bullet \text{k is the rate of decrease}\\\bullet \text{t is the number of years after 2010}\\\\A=22,000\cdot e{(-0.021)(5)}\\.\ =22,000\cdot e^{-0.105}\\.\ =19,807$

6 0

2 years ago

heights for 16 year old boys are normally distributed with a mean if 68.3 in and a standard deviation of 2.9 in. find the z-scor

allsm [11]

Simple just decide pie by the universe multiplied bye the square rout of a f1 race car most likely leading too yes

6 0

2 years ago

Suppose the same quantity is measured but with a more precise method giving an average and standard deviation of 15.0 ± 2.5. how

abruzzese [7]

To solve this, we use the z test.

The formula:

z = (x – u) / s

where x is sample value = 20, u is the mean = 15, and s is the standard deviation = 2.5

z = (20 – 15) / 2.5

z = 2

Since we are looking for values greater than 20, this is right tailed test. We use the standard distribution tables to find for P.

P = 0.0228

Therefore:

number of students = 100 * 0.0228 = 2.28

2 to 3 students will get greater than 20 measurement

7 0

3 years ago

66.64 rounded to the nearest cent

Zolol [24]

It would just be 66.6

4 0

2 years ago

Factor completely 3x ^2 + 2xy - y ^2

NemiM [27]

3x2+2xy−y2

=(3x−y)(x+y)

Answer:

(3x−y)(x+y)

5 0

2 years ago

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