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3 years ago

Which situations most likely involve the use of decimals? Choose more than one answer.

Mathematics

1 answer:

Tom [10]3 years ago

8 0

Answer:

Estimating the weight of an elephant

Step-by-step explanation:

Put an elephant onto a large boat and the marker that the water rises to Minus the starting point

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M N. M (8x+17) (12x-39)

Ulleksa [173]

Answer:

Here it is a parallelogram so opposite angles of parallelogram are equal. 

Step-by-step explanation:

so

8x +17 = 12x - 39

17+39 = 12x - 8 x

4x = 56

Therefore x = 14

3 0

3 years ago

Does the size of parachute affect the speed and why

Kryger [21]

Yes it does , more mass area = less space

6 0

3 years ago

Vectors, I need help plz

Aloiza [94]

DC :AB=3:2 can be written as

DC/AB=3/2

Then you can get the answers easily

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3 years ago

Now there is a square city of unknown size with a gate at the center of each side. There is a tree 20 b from the north gate. Tha

Brums [2.3K]

Answer:

The length of each side of the city is 250b

Step-by-step explanation:

Given

$a = 20$ --- tree distance from north gate

$b =14$ --- movement from south gate

$c = 1775$ --- movement in west direction from (b)

See attachment for illustration

Required

Find x

To do this, we have:

$\triangle ADE \sim \triangle ACB$ --- similar triangles

So, we have the following equivalent ratios

$AE:DE = AB:CB$

Where:

$AE = 20\\ DE = x/2 \\ AB = 20 + x + 14 \\ CB = 1775$

Substitute these in the above equation

$20:x/2 = 20 + x + 14: 1775$

$20:x/2 = x + 34: 1775$

Express as fraction

$\frac{20}{x/2} = \frac{x + 34}{1775}$

$\frac{40}{x} = \frac{x + 34}{1775}$

Cross multiply

$x *(x + 34) = 1775 * 40$

Open bracket

$x^2 + 34x = 71000$

Rewrite as:

$x^2 + 34x - 71000 = 0$

Expand

$x^2 + 284x -250x - 71000 = 0$

Factorize

$x(x + 284) -250(x + 284)= 0$

Factor out x + 284

$(x - 250)(x + 284)= 0$

Split

$x - 250 = 0 \ or\ x + 284= 0$

Solve for x

$x = 250 \ or\ x =- 284$

x can't be negative;

So:

$x = 250$

6 0

3 years ago

D 2. The sum of 3x2 – 8x – 2 and 4x – 2 is

maw [93]

Answer:

3x^2 -4x -4

Step-by-step explanation:

3x^2 – 8x – 2 + 4x – 2

Combine like terms

3x^2 -8x+4x -2 -2

3x^2 -4x -4

8 0

3 years ago

Read 2 more answers