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kodGreya [7K]
3 years ago
11

What is 2x+y=0 5x+3y=-11

Mathematics
1 answer:
miv72 [106K]3 years ago
4 0

2x+y=0\qquad\text{subtract 2x from both sides}\\\\y=-2x\\\\\text{Put it to the second equation}\ 5x+3y=-11:\\\\5x+3(-2x)=-11\\\\5x-6x=-11\\\\-x=-11\qquad\text{change the signs}\\\\\boxed{x=11}\\\\\text{Put the value of x to the first equation:}\\\\y=-2(11)\\\\\boxed{y=-22}\\\\Answer:\ \boxed{x=11\ and\ y=-22}

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Theresa bought three containers of tennis balls at $2.98 each. She had a coupon for $1 off. Her mom paid for half of the remaini
Rzqust [24]

Answer:

$3.97

Step-by-step explanation:

Three containers @$2.98 = 3 × 2.98 = $8.94

                                               Less $1 =   <u>-1.00 </u>

                                                                  7.94

Less 50% paid my mom = ½ × 7.94 =   <u>-3.97 </u>

                               Paid by Theresa =  $3.97

[(3 × 2.98) - 1] ÷ 2 = (8.94 - 1) ÷ 2 = 7.94 ÷ 2 = 3.97

6 0
3 years ago
What is the value of x? Enter your answer in the box.
Radda [10]

Answer:

x=47

Step-by-step explanation:

We can use the triangle bisector theorem

TK             TV

----------- = -----------

YK               YV

Substituting what we know

87.5            77

----------- = -----------

x-22               22

Using cross products

87.5 * 22 = 77 *(x-22)

Distribute

1925  =77x - 1694

Add 1694 to each side

1925 + 1694  =77x - 1694+1694

3619 = 77x

Divide by 77

3619/77 = 77x/77

47=x

8 0
3 years ago
Which answer describes the type of sequence?
Vanyuwa [196]
Aritmetic increases by the same number

geometric has 1 number that each term is multiplied by to get the next term

4 to 9 is 5
9 to 13 is 4
not same difference


9/4=13/9?
81/36=52/36?
no


neither aritmetic nor geometric
3 0
3 years ago
Read 2 more answers
PLEASE HELP this is due soon, I will mark brainliest if I can.
I am Lyosha [343]

Answer:

  • 102 cm

Step-by-step explanation:

  • Diagonals of a rhombus are perpendicular.
  • Sides are of equal length.

<u>Use Pythagorean to work out the side length.</u>

  • a² = (d₁/2)² + (d₂/2)²
  • a² = (24/2)² + (45/2)² = 650.25
  • a = √650.25
  • a = 25.5 cm

<u>The perimeter is:</u>

  • P = 4a
  • P = 4*25.5 = 102 cm
6 0
3 years ago
Read 2 more answers
Someone help and plz make sure it’s right
Temka [501]

Answer:

50

Step-by-step explanation:

all angles must equal to 180

8 0
3 years ago
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