02-11-2016
Mathematics

contestada

-x+2y=9
-7x-2y=-1
Solve each system by elimination

Respuesta :

03-11-2016

x - 2y = - 9
7x + 2y = 1

x - 2y = - 9
(+)
7x + 2y = 1
___________
8x = - 8

x = - 1

- 1 - 2y = - 9
2y = 8
y = 4

i am a mathematics teacher. if anything to ask please pm me

Answer Link

Otras preguntas

Suppose that prices of recently sold homes in one neighborhood have a mean of $225,000 with a standard deviation of $6700. Using Chebyshev's Theorem, what is th

please help me with this math problem

Suppose that when you move the north pole of a bar magnetic toward a coil it induces a positive current in the coil. The strength of the field produced by an el

Grouper Company follows the practice of pricing its inventory at the lower-of-cost-or-market, on an individual-item basis. Item Quantity Cost Cost

If you had started with a larger mass, how would the half-life change? A) It would increase. B) It would decrease. C) It would remain the same.

The following problem illustrates the way memory aliasing can cause unexpected program behavior. Consider the following function to swap two values void swap(i

Consider the chemical equation for the production of water: 2 H2+O2>2 H2O . If 100 grams of oxygen gas are used, what would the percent yield be if 75 g of H

Balt Company maintains a standard cost system. Last period, Balt spent $25,000 during the period to purchase 3,000 pounds of material H. The company used 5,000

Pleasssseeee hheeelllppp

Please answer this correctly