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nikitadnepr [17]
4 years ago
10

Nia solved the equation -1.98 = 5.2v + 13.1. Her answer was v = -2.9. She is fairly confident about her answer, but wants to do

a quick check of her solution using estimation to make sure her answer is reasonable.
Which of the following shows a good check of her answer?

-2 = 5(-3) + 13
-3 = 5(-2) + 13
-1 = 5(-2) + 13
-2 = 5(-2) + 13
Mathematics
1 answer:
icang [17]4 years ago
4 0
Remember when you just said random stuff on all my questions to get points, Anyways it's A. because they found to those numbers
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Use the equation √4x+15 - 3√x How many potential solutions are there? ​
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There is one potential solutions and no extraneous solutions.
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3 years ago
A Normal model states that if we draw repeated random samples of the same​ size, n, from some population and measure sample​ pro
notka56 [123]

Answer:

1) Randomization condition: We assume that we are selecting random samples so this condition is satisfied

2) 10% condition: We assume that the random sample selected is less than 10% of the population size

3) Success/ Failure condition:

For this case we need to satisfy this:

np \geq 10, n(1-p)\geq 10

So since the condition 1 and 2 are satisfied the correct option for this case would be:

a)np and nq must be respectively at least equal to 10

Step-by-step explanation:

Assuming the following options:

a)np and nq must be respectively at least equal to 10

b) as n increases, the distribution of sample proportions becomes less Normal

c) np and nq must be respectively less than 10

d) np plus nq must be at least 10.

For this case we need 3 basic conditions:

1) Randomization condition: We assume that we are selecting random samples so this condition is satisfied

2) 10% condition: We assume that the random sample selected is less than 10% of the population size

3) Success/ Failure condition:

For this case we need to satisfy this:

np \geq 10, n(1-p)\geq 10

So since the condition 1 and 2 are satisfied the correct option for this case would be:

a)np and nq must be respectively at least equal to 10

8 0
3 years ago
Amy wants to carpet a room that is 12 feet by 8 feet.
zavuch27 [327]
12 x 8 = 96. Lack of information so I’m not sure if there’s more to the problem
8 0
4 years ago
Read 2 more answers
Solve the system. Enter the smallest x-coordinate first
pentagon [3]

y= 3 \,\,,\,\,x= -2 \,\,and\,\, y=3\,\,,\,\, x=2

Step-by-step explanation:

Solving the following system of equations:

x^2-y=1\\2x^2+y^2=17

Let

x^2-y=1\,\,\,(1)\\2x^2+y^2=17\,\,\,(2)

Putting value of x^2 in eq(2)

x^2 = 1+y\\Putting\,\,value\,\,of\,\,x^2\,\,in\,\,eq(2)\\2(1+y)+y^2=17\\2+2y+y^2=17\\y^2+2y+2-17=0\\y^2+2y-15=0\\Factorizing:\\y^2-3y+5y-15=0\\y(y-3)+5(y-3)=0\\(y+5)(y-3)=0\\y+5=0 \,\,and \,\, y-3=0\\y = -5  \,\,and \,\, y=3

Now, finding value of x

Putting y=-5

x^2 = 1+y\\x^2=1-5\\x^2=-4\\Taking\,\,square\,\,root\\x= \pm2i

y=-5, x= 2i and y=-5 , x= -2i

Since we need to find x and y coordinates and its value cannot be in terms of i so we will not consider these as answer

Putting y=3

x^2 = 1+y\\x^2=1+3\\x^2=4\\Taking\,\,square\,\,root\\x= \pm2

So, y= 3 \,\,,\,\,x= -2 \,\,and\,\, y=3\,\,,\,\, x=2

Keywords: system of equations

Learn more about system of equations at:

  • brainly.com/question/6075514
  • brainly.com/question/13168205
  • brainly.com/question/7361044

#learnwithBrainly

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jill sold half of her comic books and then bought sixteen more. she now has 36. with how many did she begin? (two step equation)
lesantik [10]
She began with 40 comic books
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