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grin007 [14]
3 years ago
15

Can some please help

Mathematics
1 answer:
enyata [817]3 years ago
4 0

Answer:

a

Step-by-step explanation:

6(8x +5y=-7)= 48x +30y= -42

-5(-7x+6y=-4)= 35x -30y= 20

The ys would cancel out

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Need rn. worth 30.
Likurg_2 [28]

Considering the situation described, the confidence interval is given by:

(0.35, 0.51).

<h3>What is a confidence interval?</h3>

It is given by the <u>estimate plus/minus the margin of error</u>.

For this problem, we have that:

  • The estimate is of 0.43.
  • The margin of error is half the range of the observations, hence M = (0.48 - 0.32)/2 = 0.08.

Then, the bounds of the interval are given by:

  • 0.43 - 0.08 = 0.35.
  • 0.43 + 0.08 = 0.51.

More can be learned about confidence intervals at brainly.com/question/25890103

#SPJ1

4 0
2 years ago
What is the Y value of the point that Partitions the directed line segment A.B. into a 1:3 ratio
xenn [34]

Answer:

y = 5

Step-by-step explanation:

AB = | 8 - (- 4) | = | 12 |= 12

Divide 12 by the sum of the parts of the ratio, 1 + 3 = 4

12 ÷ 4 = 3

Thus

y = 8 - 3 = 5

5 0
3 years ago
QUESTION 10
Bezzdna [24]

The correct answer is A. The 200 randomly selected students

Explanation:

In most studies, the complete population is not surveyed or studied instead, a specific number of individuals are selected, this group is known as the sample. Additionally, the sample represents the population, and due to this, their answers are used to make inferences about all the population.

According to this, the population is all the students in the school, while the sample is the 200 randomly selected students because this is the group that is going to be studied to make conclusions and inferences about all the population.

7 0
3 years ago
Subtract the sum of -1 37 and - 43 from the sum of - 103 and 27​
umka2103 [35]

Step-by-step explanation:

Hey, there!!

I hope you mean to subtract (-137) +(-43) from sum of -103 and 27.

First, add -103 + 27

= - 103 + 27

=  - 76

{As ( minus + plus )= subtracts with sign which has greator value. }

now,

( - 137) + ( - 43) =  - 180

{ minus + minus = add with minus sign}.

Now, subtracting -180 from -76.

=(-76) - (-180 )

Now, multiply the sign (- × -)= +

so, -180 becomes +180

= -76+180

= 104..... is answer.

<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

7 0
3 years ago
Read 2 more answers
Which of the following is the maximum value of the equation y = −x2 − x + 6?
Ratling [72]

Step-by-step explanation:

f(x) = y= -x²-x+6

When y is max, f'(x) = 0

f'(x) = -2x-1

Equating to 0,

-2x-1= 0

x= -1/2

Put the value of x in f(x)

y = -(-1/2)² -(-1/2) +6

= -1/4+1/2+6

= 6+1/2

y= 13/2

4 0
2 years ago
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