All categories

3 years ago

How do you answer this question with workings

Mathematics

2 answers:

natima [27]3 years ago

4 0

I was going to write the same thing as the other person that answered.

Murrr4er [49]3 years ago

3 0

Answer:

$32.80

Step-by-step explanation:

Let f be the cost of a file, then a storybook costs 3f ( 3 times as much )

Then the difference in cost is

3f - f = 16.40, that is

2f = 16.40 ( divide both sides by 2 )

f = 8.20

The cost of a file is $8.20 and the cost of a storybook is 3 × $8.20 = $24.60

The total cost of the 2 items = $8.20 + $24.60 = $32.80

You might be interested in

12 % of 140 = with explanation

vovangra [49]

Answer: 16.8

Step-by-step explanation: 12% of 140 = 16.8. (I’m not sure what I say for the explanation! Really sorry! But I hope I helped!)

5 0

3 years ago

Read 2 more answers

3(4x−2)=2(5x+3) what is the answer pls asap

Paha777 [63]

Answer:

Step-by-step explanation:

1. get rid of parentheses: 12x -6 = 10x +6

2. group like terns together: 12x-10x = 6+6

3. simplify: 2x = 12

4. divide both sides by 2: x=6

7 0

3 years ago

Read 2 more answers

What is true about the absolute values of the slopes of parallel and perpendicular lines?

GenaCL600 [577]

They are the reciprocals of each other, meaning the denominator and the numerator are in switched positions

5 0

3 years ago

Read 2 more answers

A triangle has a base of x 1/2 m and a height of x 3/4 m. If the area of te triangle is 16m to the power of 2, what are the base

Olenka [21]

Answer:

The base of triangle is $\frac{8}{\sqrt{3}} \ m$ and the height of triangle is $\frac{12}{\sqrt{3}} \ m.$

Step-by-step explanation:

Given:

A triangle has a base of x 1/2 m and a height of x 3/4 m. If the area of the triangle is 16m to the power of 2.

Now, to find the base and height of the triangle.

The base of triangle = $x\times\frac{1}{2} =\frac{x}{2} \ m.$

The height of triangle = $x\times \frac{3}{4} =\frac{3x}{4}\ m.$

The area of triangle = $16\ m^2.$

Now, we put the formula of area to solve:

$Area=\frac{1}{2} \times base\times height$

$16=\frac{1}{2} \times \frac{x}{2} \times \frac{3x}{4}$

$16=\frac{3x^2}{16}$

Multiplying both sides by 16 we get:

$256=3x^2$

Dividing both sides by 3 we get:

$\frac{256}{3} =x^2$

Using square root on both sides we get:

$\frac{16}{\sqrt{3}}=x$

$x=\frac{16}{\sqrt{3}}$

Now, by substituting the value of $x$ to get the base and height:

$Base=\frac{x}{2}\\\\Base=\frac{\frac{16}{\sqrt{3}}}{2} \\\\Base=\frac{8}{\sqrt{3}} \ m.$

So, the base of triangle = $\frac{8}{\sqrt{3}} \ m.$

$Height=x\times\frac{3}{4} \\\\Height=\frac{16}{\sqrt{3}}\times \frac{3}{4} \\\\Height=\frac{12}{\sqrt{3}} \ m.$

Thus, the height of triangle = $\frac{12}{\sqrt{3}} \ m.$

Therefore, the base of triangle is $\frac{8}{\sqrt{3}} \ m$ and the height of triangle is $\frac{12}{\sqrt{3}} \ m.$

7 0

3 years ago

What is the inverse of the function f(x) = 2x + 1?

alina1380 [7]

(x) = x – 2inverse of the function

8 0

3 years ago