jolney8 jolney8

11-01-2015
Mathematics

Answered

How do you use the elimination method for 7x-3y=24
3x-7y=-16

Answer :

12-01-2015

[tex] \left \{ {{7x-3y=24\ |\cdot-3} \atop {3x-7y=-16\ |\cdot7}} \right. \\\\ \left \{ {{-21x+9y=-72} \atop {21x-49y=-112}} \right. \\+-------\\\\-40y=-184\ \ \ \ |:-40\\x=4.6\\\\3\cdot4.6-7y=-16\\13.8-7y=-16\\-7y=-16-13.8\\-7y=-29.8\ \ \ \ \ |:-7\\y=4.257[/tex]

Answer Link

Other Questions

Which of the following fraction pairs are equivalent fractions?Select one:A. [tex] \frac{1}{4} [/tex] and [tex] \frac{8}{32} [/tex]B. [tex] \frac{1}{4} [/tex] a

The temperature has been dropping 2º c every hour, and the temperature at 10:00 AM was-15 °c. At what time was the temperature 0°c ?

The process of creating an "us" versus "them" mentality about groups of people is called socialA. distinctionB. categorizationC. seriationD. personalization

A water jet shoots short spurts of water over a walkway. The water spurts reach a maximum height, then come down into a pond of water on the other side of the w

Select "Proportional" or "Not Proportional" to correctly classify the pair of ratios.[tex]\[ \begin{tabular}{|l|c|c|} \hline & \text{Proportional} & \te

a bathtub filled with a rate of 72inch/second. The density is .58 ounc/inch3. How long will it take for the tub to fill 11000 ounces of water

Siena's Cathedral in the 14th century housed many major paintings dedicated to what subject?

The reaction of lithium with sulfur is similar to that of sodium with sulfur. Write the balanced chemical equation for the reaction of lithium with sulfur. Incl

Tina has 48 rabbits. 32 of the rabbits are male. 9 of the female rabbits are black. 14 of the white rabbits are male.a) Use the information to complete the two-

A person will randomly win 1 of 5 prizes. The cash values of the 5 prizes are [tex]\[tex]$5, \$[/tex]10, \[tex]$10, \$[/tex]10, \$20[/tex], respectively. Which

Which of the following is an example of a species changing over time. Select all that apply.

what does the W mean in M4A1 (76) W?

How did a new political party affect the challenges to slavery ?

two pairs of different sizes contain 34.5 liters of water altogether. when 0.68 liter of water is poured from the bigger pail into the smaller pail, the amount

Why were the Battles of Gettysburg and Vicksburg significant? A. They were the first major battles of the war and showed how costly it would be. B. They were th

About 500 B.C.E., the metal that made Meroë prosperous was (A) iron. (B) copper. (C) bronze. (D) gold. (E) silver.

The key concept to explain the west's policy toward communist countries during the Cold War was containment appeasement non-alignment rely on the United Nations

What volume (measured at STP) will 3.75 grams of helium gas occupy?

Aiden measures with paper strips. It is actually 10 paper strips long, but he gets answer of 8. What is his mistake? Write or draw.. Thank you

Mark bed takes up 2/5 of the floor space in his room. If Mark''s room takes up 1/8 of the floor space in his house, what fraction of the floor space in the enti