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inn [45]
2 years ago
11

Subtract 2xy-8 from 5x^2+3xy+12

Mathematics
1 answer:
JulijaS [17]2 years ago
3 0

Answer:

5x^2 + xy + 20

Step-by-step explanation:

Begin with 5x^2+3xy+12,  Subtracting 2xy yields 5x^2 + xy + 12.  Next, subtracting -8 yields 5x^2 + xy + 12 - (-8), or   5x^2 + xy + 20

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Brian tied a 136-foot rope around the perimeter of his rectangular house. He knows that the length of the house is 10 feet less
STALIN [3.7K]

Answer:

length 42 cm and width 26 cm

Step-by-step explanation:

Given

Since Brian tied 136 foot rope around the perimeter , hence perimeter of house is 136 foot.

Given that shape of house is rectangular.

formula to calculate perimeter of rectangle can be used which is 2*(L+B)

where L is length of rectangle and B width of rectangle

Let the L and B be length of rectangular side of house

According to question

length of house is 10 feet less than twice the width of house

mathematically it can be represented as

L = 2*B - 10  --->eq. 1

Perimeter of house = 136 feet

using formula of Perimeter of rectangle

136 = 2*(L+B)

substituting the value of length in terms of width from eq. 1 in formula of perimeter

=> 136/2 = 2*B - 10 + B  (2*B+ B = 3B)

=> 68 = 3*B - 10

=> 78 = 3*B

B = 78/3 = 26

Therefore B which is width = 26 CM

length = 2*B - 10= 26*2 - 10 = 52-10=42

length of house = 42  cm

Hence dimension of Brian's house is length 42 cm and width 26 cm

5 0
3 years ago
PLS HELP ME WITH 3!<br><br> THANK YIU SO MUCH!!<br><br><br> (Random answers gets moderated.)
kirill115 [55]
6 {x}^{2} - 7x - 5 \\ 6 {x }^{2} + 3x - 10x - 5
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8 0
3 years ago
3<br> x<br> +<br> y<br> =<br> −<br> 14<br> 4<br> x<br> +<br> 4<br> y<br> =<br> −<br> 16
aev [14]

Answer:

y=1

x=-5

Step-by-step explanation:

3x+y=-14

4x+4y=-16

y=-3x-14

4x+4y=-16

y=-3x-14

4(-3x-14)+4x=-16

y=-3x-14

-8x-56=-16

y=-3x-14

-8x=40

y=-3x-14

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y=1

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4 0
3 years ago
I need help solving 12 1/4 - 5 2/3<br> I’m having trouble
Lady_Fox [76]

Answer:

6 7/12

Step-by-step explanation:

We need to get a common denominator, which is 12

12 1/4 - 5 2/3

12 1/4*3/3 - 5 2/3*4/4

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We will need to borrow from the 12 since 3/12 is less than 8/12.  Write the 1 we borrow as 12/12

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11 15/12 - 5 8/12

6 7/12

8 0
3 years ago
How likely is it that you will land on a yellow space? A) certain B) impossible C) probable D) unlikely
lions [1.4K]

Answer:

Step-by-step explanation:

It would be c cause it is possible to land on yellow

4 0
3 years ago
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