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3 years ago

I got the first part but cant figure out the second, help would be appreciated

Mathematics

1 answer:

azamat3 years ago

6 0

Answer:

see explanation

Step-by-step explanation:

look at the explanation& answer photo

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Matt's rectangular patio measures 9 feet by 12 feet. he wants to increase the patio's dimensions so its area will be twice the a

Eva8 [605]

The present dimensions are : length = 12 feet

width = 9 feet

Area = 12* 9 = 108 feet squared

If the dimensions are increased by x feet the dimensions are :

length = 12 + x

width = 9+ x

Area = ( 12+x)( 9+x)

new area = initial area * 2

( 12+ x)( 9+ x) = 2 * 108

12*9 + 12x + 9x + xx = 216

108 + 21 x + x^2 = 216

x^2+ 21x = 216-108

x^2 + 21x = 108

x^2 + 21x -108 = 0

let us plug a= 1 b= 21 c= -108 in quadratic formula

x= [-21 + / - ( 21^2 - 4* 1 * -108 )^(1/2 ]/ 2* 1

x= 4.27

Answer :

Both sides are increased by 4.27 feet .

7 0

4 years ago

PLSSS HELP IF YOU TURLY KNOW THISS

Montano1993 [528]

It is 7

2*2x = 4x + 2 = 30

4x = 28

x = 7

6 0

3 years ago

Read 2 more answers

No Explanation Please Don't Answer

vazorg [7]

Answer:

A) $\frac{1}{2}(9+15)w$

Step-by-step explanation:

Area of a trapezoid is $\frac{1}{2}(base1+base2) *h$

$A=\frac{1}{2}(9+15)*w$

8 0

3 years ago

A pianist plans to play 4 pieces at a recital from her repertoire of 20 pieces, and is carefully considering which song to play

balu736 [363]

There are 1,16,280 different recital programs possible.

Given: A pianist plans to play 4 pieces at a recital from her repertoire of 20 pieces and is carefully considering which song to play first, second, etc.

It means the repetition of pieces is not allowed.

When repetition is not allowed, then the number of ways to arrange n things where r things taken together is given by:-

$^{n} P_{r} =\frac{n!}{(n-r)!}$

Now, the number of different recital programs are:-

$^{20} P_{4} =\frac{20!}{(20-4)!}=\frac{20*19*18*17*16!}{16!}=116280$

Hence, there are 1,16,280 different recital programs possible.

Learn more about probability here brainly.com/question/251701

#SPJ4

4 0

3 years ago

6/10 of the class has a pet dog. 27/100 of the class has a pet cat. The rest of the class has a pet fish. What fraction of the c

kompoz [17]

Answer:

13/100 have pet fish

Step-by-step explanation:

6/10 = 60/100

60/100 + 27/100 = 87/100 have cats and dogs

that leaves 13/100 have pet fish

3 0

3 years ago