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3 years ago

Pls help -5n-8(1+7n)=-8

Mathematics

1 answer:

cricket20 [7]3 years ago

8 0

I don't understand this

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Can someone help me with this math problem please

Ulleksa [173]

Step-by-step explanation:

As the triangles are similar so,

3/9 = 4/12 = 4.5/k

Taking 3/9 and 4.5/k Then

$\frac{3}{9} = \frac{4.5}{k} \\ \: cross \: multiply \\ k \: = \frac{9 \times 4.5}{3} \\ k \: = 13.5 \\hope \: it \: will \: help$

6 0

3 years ago

Select the correct answer from each drop-down menu. Factor the expression 8x3y − 8x2y − 30xy. 8x3y − 8x2y − 30xy = ( )( )

pychu [463]

Answer:

$8x^3y-8x^2y-30xy=2xy(2x+3)(2x-5)$

Step-by-step explanation:

we are given an expression as

$8x^3y-8x^2y-30xy$

Firstly, we will find factors

$(2xy)\times 4x^2-(2xy)\times 4x-(2xy)\times 15$

We can see that 2xy is common in all terms

so, we can factor out 2xy from all terms

and we get

$8x^3y-8x^2y-30xy=2xy(4x^2-4x-15)$

now, we can factor again

$4x^2-4x-15=(2x+3)(2x-5)$

we get

$8x^3y-8x^2y-30xy=2xy(2x+3)(2x-5)$

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4 years ago

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AVprozaik [17]

Answer:converse

Step-by-step explanation:

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4 years ago

I WILL MARK BRAINIEST

serg [7]

Answer:

h = 40.5 m

A) 1 : 9

B) 1 : 3

C) 40.5 m

Step-by-step explanation:

Let the height of the larger triangle be h

Therefore,

$\frac{10}{90}= \frac{4.5}{h}\\\\\frac{1}{9}= \frac{4.5}{h}\\\\h = 9\times 4.5\\\\h = 40.5\:m\\$

The ratio of the area of small triangle to the large triangle

$=\frac{10}{90}=\frac{1}{9}=1 : 9$

The ratio of the side length of small triangle to the side length of large triangle

$=\sqrt{\frac{10}{90}} =\sqrt {\frac{1}{9}} =1 : 3$

C) The height of the larger triangle is <u>40.5 m</u>

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3 years ago

Skating is cool Bc you get good

Mrrafil [7]

Is this a question or a comment? Sorry I'm confuse...

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3 years ago

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