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3 years ago

Mr. Ruiz randomly chose 90 students from

Mathematics

2 answers:

arlik [135]3 years ago

5 0

Answer:

Step-by-step explanation:

15 out of 90

Divide both sides by 15

1 out of 6

It is reasonable to assume that the ratio 1:6 will be consistent

1:6

Multiply both sides by 20 to get 120 students

20 : 120

20 people have a Galaxy S21 out of 120, so 120-20, which is 100 don't have a Galaxy S21.

The answer is 100.

Hope this helps :)

Have a great day!

Oksanka [162]3 years ago

4 0

Answer:

Step-by-step explanation:

Im sorry if this wrong I tryed I think this right not sure

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Solve the following system of equations: <br> x − 2y = 5 <br> 2x − 4y = 10

sineoko [7]

The answer is no slotion

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3 years ago

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Describe the sequence of transformations for which Triangle B is the image of Triangle A.

Helga [31]

Answer:

reflection in x = 1
translation up 2

Step-by-step explanation:

The orientation of B is the opposite of the orientation of A, so a reflection is involved. The smallest angle is at the bottom in both figures, and the largest angle is on the right in A and the left in B, so the reflection is left-right, rather than up-down.

The point midway between the largest angle vertices is on the vertical line x=1, so that line can be used for reflection. Reflecting A across that line will put its large-angle vertex at (3, 0), so a translation up 2 units is also needed.

The reflection on x=1 and translation up 2 can be done in either order.

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<em>Additional comment</em>

A combination of reflection and translation is called a "glide reflection." Our choice of x = 1 as the line of reflection takes care of any horizontal translation that would be required if a different vertical line were used. For example, reflection across the y-axis would require a subsequent translation up 2 and right 2.

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3 years ago

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Find the missing angles

o-na [289]

Answer:

<b= 36 degrees, <c= 144 degrees

Step-by-step explanation:

144 and b are supplementary meaning they add up to 180.

144 and c are vertical angles meaning they are congruent.

8 0

3 years ago

Based on past experience, a bank believes that 8.9 % of the people who receive loans will not make payments on time. The bank ha

love history [14]

Answer:

To be able to approximate the sampling distribution with a normal model, it is needed that $np \geq 10$ and $n(1-p) \geq 10$ , and both conditions are satisfied in this problem.

Step-by-step explanation:

For each person, there are only two possible outcomes. Either they will make payments on time, or they won't. The probability of a person making the payment on time is independent of any other person, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

Probability of exactly x successes on n repeated trials, with p probability.

The sampling distribution can be approximated to a normal model if:

$np \geq 10$ and $n(1-p) \geq 10$

Based on past experience, a bank believes that 8.9 % of the people who receive loans will not make payments on time.

This means that $p = 0.089$

The bank has recently approved 220 loans.

This means that $n = 220$

What must be true to be able to approximate the sampling distribution with a normal model?

$np = 220*0.089 = 19.58 \geq 10$

$n(1-p) = 220*0.911 = 200.42 \geq 10$

To be able to approximate the sampling distribution with a normal model, it is needed that $np \geq 10$ and $n(1-p) \geq 10$ , and both conditions are satisfied in this problem.

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3 years ago

Rewrite the following equation in slope-intercept form.

Nana76 [90]

Answer:

y=1.7x + 1.3

Step-by-step explanation:

16x + 15y =20

therefore we make the variable stand on its own

15y = 20 - 16x

Divide both sides by the variable which is 15.

it will be y= 1.3 - 1 7x

so therefore the answer is :

y= 1.7x + 1.3

6 0

3 years ago