All categories

4 years ago

What is 2.25 − (−0.25)?

Mathematics

1 answer:

pashok25 [27]4 years ago

3 0

$2.25 - (-0.25)$

$2.25+0.25$

$=2.5$

Hope it helps!

You might be interested in

If 30,000 cm2 of material is available to make a box with a square base and an open top, find the largest possible volume of the

Ilya [14]

Answer:

The largest possible volume of the box is 500,000 cm³

Step-by-step explanation:

Let the a side of the square base = x

let the height of the box, = h

volume of the box, v = hx²

Surface area of the box, A = 4hx + x²

30000 = 4hx + x²

make h the subject of the formula;

$4hx + x^2 = 30000\\\\4hx = 30000 -x^2\\\\h = \frac{30000 -x^2}{4x}$

Volume of the box, V = hx²

$V = h*x^2 = (\frac{30000-x^2}{4x} )x^2\\\\V = \frac{30000x^2 -x^4}{4x} \\\\V = \frac{30000x^2}{4x} - \frac{x^4}{4x} \\\\V = 7500x- \frac{x^3}{4}$

At maximum value of V, dv/dx = 0

$\frac{dv}{dx} = 7500 - \frac{3}{4} x^2\\\\0 = 7500 - \frac{3}{4} x^2\\\\\frac{3}{4} x^2 = 7500\\\\x^2 = 10000\\\\x = \sqrt{10000} \\\\x = 100$

Substitute in the value of x to determine the maximum volume, V;

$V = 7500x - \frac{x^3}{4} \\\\V = 7500(100) - \frac{1}{4} (100)^3\\\\V = 750000- 250000\\\\V = 500,000 \ cm^3$

Therefore, the largest possible volume of the box is 500,000 cm³

4 0

4 years ago

Multiply. Simplify by combining like terms. (m+11N)^2

Aloiza [94]

(m+11n)^2
=(m+11n)(m+11n)
=m^2+11mn+11mn+121n^2
=m^2+22mn×121n^2

For Example;

use FOIL: (a+b)(a+b)

First. a^2
Outside. ab
Inside. ab
Last. b^2

4 0

4 years ago

What is the value of tan(60°)? right triangle ABC

jeyben [28]

Answer:

tan(60°) =√3

Step-by-step explanation:

tan(60°) = sin (60°)/cos(60°) = (√3/2)/(1/2) = (√3/2)×(2/1)

tan(60°) =√3

8 0

3 years ago

Timothy bought 10 cookies for $5.00.

sweet-ann [11.9K]

R u serious,
y=1/2x
graph at (0,0), and (10, 5)
clearly
ez.

6 0

3 years ago

Read 2 more answers

-8x+2y=12 in slope intercept form

Juli2301 [7.4K]

Answer:

y= -4x + 3

Step-by-step explanation:

7 0

4 years ago

Read 2 more answers