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3 years ago

Help with my geometry hw please :/

Mathematics

1 answer:

MrRa [10]3 years ago

7 0

What do you need help

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"Eighty and fifteen hundredths" in numbers<br>(decimals)

Black_prince [1.1K]

Answer:

80.15

Step-by-step explanation:

Eighty and fifteen hundredths = 80.15

4 0

4 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

I need help <br>I need help fast

german

Answer:

<STP=105°

Step-by-step explanation:

two interior angles equal one opposite exterior angle therefore

7x+6+7x+1=15x

group like terms

6+1=15x-7-7

7=15x-14x

7=x

for 15x

15 will multiply 7 and that is 105

6 0

3 years ago

Of the 300 students in a homeroom ,120 playh a school sport .What percent of students play a school sport

strojnjashka [21]

You would do 120/300 = p/100 and you would get 40%

6 0

3 years ago

Read 2 more answers

You've decided you want a plant for your room. At the gardening store, there are 4 different kinds of plants (tulip, fern, cactu

liraira [26]

6/8 chance should be the answer :)

Hopes this helps, and plz mark Brainliest if correct!!

5 0

3 years ago