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4 years ago

What is the answer to this question

Mathematics

2 answers:

nadezda [96]4 years ago

6 0

A is the correct answer.

This is because if you multiply 0.25 by 4, that would equal 1. Now, multiply 12 by 4 as well and you'll get 48. So the scale is 1:48.

Illusion [34]4 years ago

5 0

A is the correct answer.

You might be interested in

Find FH A. 13.5 B. 6.0 C. 8.1 D. 6.7

Black_prince [1.1K]

Step-by-step explanation:

the FH seems to be option b.6.0

........

3 0

3 years ago

Simplify the expression, show your work

Mila [183]

Answer:

$\dfrac{-y(2x^2 + y)}{x(6x - 5y^2)}$

Step-by-step explanation:

$\dfrac{\frac{1}{x^2}+\frac{2}{y}}{\frac{5}{x}-\frac{6}{y^2}} =$

To eliminate the denominators of the main numerator and denominator, we multiply the numerator and denominator of the main fraction by the LCD of all small denominators.

The LCD of x^2, y, x, and y^2 is x^2y^2.

$= \dfrac{x^2y^2 \times (\frac{1}{x^2}+\frac{2}{y})}{x^2y^2 \times (\frac{5}{x}-\frac{6}{y^2})}$

$= \dfrac{y^2 + 2x^2y}{5xy^2 - 6x^2}$

$= \dfrac{y(y + 2x^2)}{x(5y^2 - 6x)}$

$= \dfrac{-y(2x^2 + y)}{x(6x - 5y^2)}$

4 0

4 years ago

In a test (+4) marks are given for every correct answers and (-3) marks are given for every incorrect answers 1) Tahiya answered

stealth61 [152]

Answer:

Tahiya attempted 3 incorrect answers.

Helmin attempted 11 incorrect answers.

Step-by-step explanation:

Correct = +4

Incorrect = -3

1) Tahiya got 12 correct answers and scored a 40, the number of incorrect answers was:

$4*12-3I=40\\I=\frac{8}{3}\\I=2.67$

2) Helmin got 5 correct answers and scored a -14, the number of incorrect answers was:

$4*5-3I=-14\\I=\frac{34}{3}\\I=11.33$

In both cases the number of incorrect answers obtained is a fraction, which means that either the data provided is inaccurate, or that the scores obtained by the students are approximate. Let's round the number of incorrect answers to the nearest whole answer.

Tahiya attempted 3 incorrect answers.

Helmin attempted 11 incorrect answers.

4 0

3 years ago

I need help with the question

sweet [91]

Answer:

Step-by-step explanation:

Comment

√15 = 3.87

√12 = 3.46 Subtract these 2

Difference = 0.41

5 0

1 year ago

. Squares with sides of length x are cut out of each corner of a rectangular piece of cardboard measuring 2323 ft by 1313 ft. Th

Nuetrik [128]

Answer:

(a)Therefore the volume of the box is 361.19 cubic ft.

(b)Therefore the volume of the box is 361.19 cubic ft.

Step-by-step explanation:

Given that,

Squares with sides length x are cut out from of each corner of a rectangular piece of cardboard measuring 23 ft and 13 ft.

Now the length of the box is =(23-2x) ft

The width of the box is =(13-2x) ft

The height of the box is= x

The volume of the box is = Length×width×Height

=(23-2x)(13-2x)x cubic ft

= 299x-72x²+4x³ cubic ft

Let,

V=299x-72x²+4x³

Differentiating with respect to x

V'= 299-144x+12x²

Again differentiating with respect to x

V''= -144+24x

To find the maximum volume, we set V'=0

∴299-144x+12x²=0

Applying quadratic formula $x=\frac{-b\pm\sqrt {b^2-4ac}}{2a}$ , here a=12,b= -144 and c=299

$\therefore x=\frac{-(-144)\pm\sqrt{(-144)^2-4.12.299}}{2.12}$

$\Rightarrow x= 9.33, 2.67$

For x= 9.33 , the width of the box will negative which is impossible.

So, x= 2.67

$V''|_{x=2.67}=-144+24(2.67)$

So, at x=2.67, the volume of the box will be maximum.

Therefore the volume of the box is

=(299x-72x²+4x³) cubic ft

=361.19 cubic ft

(b)

The value of s will same with the value of x

so the volume of the box also remains same.

Therefore the volume of the box is 361.19 cubic ft

6 0

3 years ago