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lisabon 2012 [21]
3 years ago
15

Solve the system of equations using the elimination method. 2x - 3y = 50; 7x + 8y = -10

Mathematics
2 answers:
Sonbull [250]3 years ago
5 0

Answer:

See the picture and u will get the answer

Klio2033 [76]3 years ago
3 0

Answer:

x=10

y=-10

Step-by-step explanation:

multiply first row by 7

14x−21y=350

​7x+8y=−10

multiply second row by 2

14x−21y=350

​14x+16y=−20

subtract the first row by the second row

−37y=370

solve for y

y=−10

substitute y=-10

14x−21×−10=350

solve for x

x=10

and thats your answer

x=10

y=-10

​

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13 copies of the small rectangle shown below have been used to make the larger rectangle.
Nikolay [14]

Answer:

4800

Step-by-step explanation:

length = 20mm X 3 = 60mm

width = 20mm X 4 = 80mm

area = length X width = 60 X 80 = 4800 mm^{2}

I hope it helps you!

8 0
2 years ago
Find the angle measures. Justify your responses.
MatroZZZ [7]

Answer:

m∠3 = 2x - 10° and m∠6 = 3x + 20

m∠3 = 58°          ;    m ∠6 = 122°

Step-by-step explanation:

a ║ b

m∠2 = m∠6                     If ║ cut by a transversal, then corresponding angles

                                         are ≅ and =

m∠7 = m∠3                   If ║ cut by a transversal, then corresponding angles

                                       are ≅ and =

m∠2 = 3x + 20              Given

m∠7 = 2x - 10                 Given    

m∠6 + m∠3 = 180°         If ║ cut by a transversal, then each pair of same-side

                                       interior angles (also called consecutive interior angles

                                       are supplementary (sum = 180°) .    

3x + 20 + 2x - 10 = 180°

5x + 10 = 180°

5x = 170°

x = 34°

Answer:   m∠3 = 2x - 10° and m∠6 = 3x + 20

                m∠3 = 2(34) - 10  ;    m∠6 = 3(34) + 20

                 m∠3 = 58°          ;    m ∠6 = 122°

                                 

5 0
2 years ago
Jada saw a music video that her favorite artist recently posted online. The equation v(t) = 425 (5)^t represents the number of v
romanna [79]

Answer:

The result to v(-2) taking into account the given equation is:

  • <u>17 views</u>.

Step-by-step explanation:

To obtain the result to v(-2), you must understand that v(-2) means the number of views that the video had two days before Jada saw the video. Then, using the equation:

  • v(t) = 425 * (5)^t

And replacing it we have:

  • v(-2) = 425 * (5)^(-2)
  • v(-2) = 425 * 0.04
  • <u>v(-2) = 17</u>

As you can see with the calculations, <u><em>the number of views of the video two days before Jada saw it were 17</em></u>.

3 0
3 years ago
A computer company uses the function f(h) = 50h + 75 to calculate the total repair bill, f(h), for h number of hours worked. Fin
IgorLugansk [536]

4 Hours because 50 times 4 is 200 and 200+75 is 275

5 0
3 years ago
Read 2 more answers
a recycling company pays $0.45 for each pound of aluminum. A school has collected 71.6 pounds of aluminum cans. About how much m
inysia [295]
$32, because if you multiply 71.6 with $0.45, you get $32.22. If you round 32.22, you get 32
3 0
3 years ago
Read 2 more answers
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