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Luden [163]
4 years ago
14

Solve the system -x - 2y = -11 and 9x + 8y = 19 by combining the equations​

Mathematics
1 answer:
shtirl [24]4 years ago
3 0
The answer to the question

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The cost of fencing a Square Garden is 400 at the rate of 1 per metre find its length​
grin007 [14]

Here Is The Answer:

Perimeter of garden = 400 m

side of square = 400 / 4

                       = 100 m

Area of garden => 100 m x 100 m

                        => 10000 m^2

Hope It Helps You!!!  

Have A Nice Day!!!  ^_^

8 0
3 years ago
Factor completely 81x8 − 1. (9x4 − 1)(9x4 1) (3x2 − 1)(3x2 1)(9x4 − 1) (3x2 − 1)(3x2 1)(9x4 1) (3x2 − 1)(3x2 1)(3x2 1)(3x2 1).
mojhsa [17]

Answer:

(3x^2 - 1)(3x^2 + 1)(9x^4 + 1).

Step-by-step explanation:

Using the identity for the difference of 2 squares;

a^2 - b^2 = (a - b)(a + b)  

we put a^2 = 81x^8 and b^2 = 1  giving

a = 9x^4 and b = 1, so:

81x^8 − 1 =   (9x^4 - 1)(9x^4 + 1)

Applying the difference of 2 squares to 9x^4 - 1:

= (3x^2 - 1)(3x^2 + 1)(9x^4 + 1).

4 0
2 years ago
Mr.gilliam is 3 years younger than his wife.the sum of their ages is 95.how old is mr.gilliam
Usimov [2.4K]
X = the age of Mr. Gilliam
His wife is 3 years older, so the age of Mr. Gilliam's wife = x+3
The sum of their ages is 95.

x+x+3=95 \\
2x+3=95 \\
2x=95-3 \\
2x=92 \\
x=46

Mr. Gilliam is 46 years old.
3 0
3 years ago
Read 2 more answers
Can anyone help me with this?
Rus_ich [418]
15)
20/8 = x / 6
x = 20 * 6 / 8 
x = 15

16)
18/54 = (x+4)/75
1/3 = (x+4) / 75
3(x+4) = 75
3x + 12 = 75
3x = 63
x = 21

SF = 54/18
SF = 3

17)
complement angles sum = 90
90 /18 = 5
so
5 x 11 = 55
5 x 7 = 35

smaller angle = 35 degrees

18)
ratio 4:5:9
4+5+9 = 18
sum of interior angles of a triangle  = 180
180 / 18 = 10

largest angle = 10 x 9 = 90

answer
largest angle = 90 degrees

6 0
3 years ago
PLEASE HELP ILL GIVE BRAINLIEST Sara is making a cake in a trapezoid
alukav5142 [94]

Answer:

D im not sure just my opinion

5 0
2 years ago
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