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Serga [27]
3 years ago
14

Q 5 please help me to resolve

Mathematics
2 answers:
liraira [26]3 years ago
7 0

Put 15 where n is, then do the arithmetic.

b(n) = 6n . . . . . . . . . . . the formula for the number of bulbs for n chandeliers

b(15) = 6·15 = 90

The appropriate choice is ...

... 90 light bulbs

7nadin3 [17]3 years ago
6 0

Substitute n=15 into the function because n is the number of chandeliers. You will get 90, which is the correct answer.



*** Please mark this answer as the Brainliest and leave a Thanks if I helped you! :) ***

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A survey of the students in Lance’s school found that 58% of the respondents want the school year lengthened, while 42% think it
alina1380 [7]
The margin of error of a given statistic is an amount that is allowed for in case of miscalculation or change of circumstances.

It is usually the radius or half of the width of the confidence interval of that statistic.

Given that a<span> survey of the students in Lance’s school found that 58% of the respondents want the school year lengthened, while 42% think it should remain the same. The margin of error of the survey is ±10%.

This means that 58% </span><span>± 10% of the </span>respondents want the school year lengthened, while 42% <span><span>± 10% think it should remain the same.</span>

Thus, from 48% to 68% </span><span><span>of the respondents want the school year lengthened, while from 32% to 52% <span>think it should remain the same.</span> </span>

Therefore, according to the survey data, at least 32% of students want the duration of the school year to remain unchanged, and at least 48% want the school year to be lengthened.</span>
7 0
3 years ago
Explain in easy terms, how the signs of the last terms of the two binomial factors of a trinomial are determined?
shutvik [7]

Explanation:

It helps to understand the process of multiplying the binomials. Consider the simple case ...

  (x +a)(x +b)

The product is ...

  (x +a)(x +b) = x² +(a+b)x + ab

If the <em>constant</em> term (ab) is <em>negative</em>, the signs of (a) and (b) are <em>different</em>.

If the constant term (ab) is <em>positive</em>, the signs of (a) and (b) will both match the sign of the coefficient of the linear term (a+b).

___

Of course, the sum (a+b) will have the sign of the (a) or (b) value with the largest magnitude, so when the signs of (a) and (b) are different, the factor with the largest magnitude will have the sign of (a+b), the x-coefficient.

<u>Example</u>:

  x² -x -6

 -6 tells you the factors will have different signs. -x tells you the one with the largest magnitude will be negative.

  -6 = -6×1 = -3×2 = ... (other factor pairs have a negative factor with a smaller magnitude)

 The sums of these factor pairs are -5 and -1. We want the factor pair that has a sum of -1, the coefficient of x in the trinomial.

  x² -x -6 = (x -3)(x +2)

5 0
3 years ago
Find the slope and y-intercept of -x + 2y = 3. I need help on working this problem out​
natita [175]

Answer:

So the slope of this function is \frac{1}{2} and the y-intercept is \frac{3}{2}

Step-by-step explanation:

A first order function has the following format:

y = ax + b

In which a is the slope and b is the y-intercept, that is, the value of y when x = 0.

We have the following equation:

-x + 2y = 3

We just have to rewrite this equation

2y = x + 3

y = \frac{x+3}{2}

y = \frac{x}{2} + \frac{3}{2}

Which means that

a = \frac{1}{2}, b = \frac{3}{2}

So the slope of this function is \frac{1}{2} and the y-intercept is \frac{3}{2}

6 0
3 years ago
The figures below are rectangles. Which polynomial represents the area of the shaded region? HAVE ALL MY POINTS but answer truth
Aleks04 [339]

Answer:

7x - 1

Step-by-step explanation:

Area of the shaded region = area of the large rectangular - area of the small rectangle

Area of rectangle is given as l*w

Area of the large rectangle = l*w = (x + 5)(x - 1)

Expand

= x(x - 1) +5(x - 1)

= x^2 - x + 5x - 5

Area of large rectangle = x^2 + 4x - 5

Area of small rectangle = l*w = (x + 1)(x - 4)

= x(x - 4) +1(x - 4)

=  x^2 - 4x + x - 4

Area of small rectangle = =  x^2 - 3x - 4

Area of shaded region = (x^2 + 4x - 5) - (x^2 - 3x - 4)

= x^2 + 4x - 5 - x^2 + 3x + 4

Collect like terms

= x^2 - x^2 + 4x + 3x - 5 + 4

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6 0
3 years ago
Your company estimates that it takes you 20 minutes less each day to complete your filing tasks
madam [21]

Hi!

<h3>Let's say you work 5 hours each day for 5 days. </h3>

<em>There are 300 minutes in 5 hours. </em>

  • Monday: 300 - 20 = 280
  • Tuesday: 280 - 20 = 260
  • Wednesday: 260 - 20 = 240
  • Thursday: 240 - 20 = 220
  • Friday: 220 - 20 = 200

<u>It saves you 100 minutes, which is 1 hour and 40 minutes.</u>

Another way to solve this is 20 * 5 = 100.

<h2>The answer is: It will save you 1 hour and 40 minutes each week.</h2>

Hope this helps! :)

-Peredhel

5 0
3 years ago
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