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3 years ago

Solve each system by using substitution. 3x - y = 4 x + 5y = -4

Mathematics

1 answer:

babunello [35]3 years ago

5 0

Answer:

$from \: last \: equation : \\ x = - 4 - 5y - - - (a) \\ substitute \: in \: first \: equation \\ 3( - 4 - 5y) - y = 4 \\ - 12 - 15y - y = 4 \\ - 16y = 16 \\ y = - 1 \\ \\ therefore \: from \: (a) \\ x = - 4 - 5( - 1) \\ x = 1$

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Whice set of side will make a triangle

telo118 [61]

First things first.. What type of triangle

If u are taking about a normal triangle here is some:

∠60+∠60+∠60

∠30+∠90+∠60

∠11+∠82+∠87

7 0

3 years ago

It describes itself <3

irina [24]

Answer:

432 ft²

Step-by-step explanation:

The formula of finding the area of a trapezoid: (base 1 + base 2/ 2) x h

(base 1 + base 2/ 2) x h

= (20 + 28/2) x 18

= 24 x 18

= 432 ft²

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3 years ago

Use the identity (x+y)(x2−xy+y2)=x3+y3 to find the sum of two numbers if the product of the numbers is 10, the sum of the square

professor190 [17]

Answer:

The sum of two numbers is 7.

Step-by-step explanation:

Given : the product of the numbers is 10, the sum of the squares of the numbers is 29, and the sum of the cubes of the numbers is 133.

Using identity $(x+y)(x^2-xy+y^2)=x^3+y^3$ and given details, we have to find the sum of two numbers.

Since, given that the product of the numbers is 10 that is $xy=10$

Also, given the sum of the squares of the numbers is 29 that is $x^2+y^2=29$

and the sum of the cubes of the numbers is 133 that is $x^3+y^3=133$

Using, the given identity $(x+y)(x^2-xy+y^2)=x^3+y^3$ ,

Substitute, the given values, we have,

$(x+y)(29-10)=133$

Simplify , we get,

$(x+y)(19)=133$

Divide both side by 19, we have,

$(x+y)=7$

Thus, the sum of two numbers is 7.

7 0

3 years ago

Read 2 more answers

What would x^4-10x^2+25 be equivalent to

Mademuasel [1]

Answer:

if i can get brainliest that would be great

IF Factor x4−10x2+25

x4−10x2+25

=(x2−5)(x2−5)

Answer:

(x2−5)(x2−5)

IF simplify

x4−10x2+25

There are no like terms.

Answer:

=x4−10x2+25

7 0

3 years ago

No link need right answer 100 points

Flauer [41]

Answer:

3 in3

Step-by-step explanation:

1/2 x 1/2 x 1/2=1/8

1/8 x 24= 3

5 0

3 years ago

Read 2 more answers