All categories

3 years ago

Solve each system of linear or non-linear equations. Show all work!! 3x - 4y = 13 2x + y = 5

1 answer:

6 0

Answer: See below

Explanation:

3x - 4y = 13 (1)
2x + y = 5 (2)
——————
3x - 4y = 13
4(2x + y = 5) (2) times 4
——————-
3x - 4y = 13
8x + 4y = 20
——————-
11x = 33
x = 33/11
x = 3

Plug x = 3 in (2):

2(3) + y = 5
6 + y = 5
y = 5-6
y = -1

Thus, x = 3 and y = -1

You might be interested in

NEED HELP ASAP!

Inga [223]

Answer:

The answer to your question is:

61.- 25

62.- 26

Step-by-step explanation:

61.-

2(5x + 5) + 2(2x) = 360

10x + 10 + 4x = 360

14x = 360 - 10

14x = 350

x = 350/14

x = 25

62.-

2(4x - 4) + 2(3x + 2) = 360

8x - 8 + 6x + 4 = 360

14x - 4 = 360

14x = 360 + 4

14x = 364

x = 364 / 14

x = 26

3 0

3 years ago

1213 students went on a field trip.Seven students traveled in cars and six buses were available.How many students would ride on

Alecsey [184]

Answer:201 students

Step-by-step explanation: Since there are seven kids riding in cars, you would subtract 7 from 1213 to get 1206 students. The six buses means you divide by 6 to get 201 students in each bus.

7 0

3 years ago

Please show all work with the answers please

kenny6666 [7]

Part A

The angle of elevation of the staire case is given by

$Angle\ of\ elevation=\tan^{-1}{ \frac{Vertical\ rise}{landing} } \\ \\ =\tan^{-1}{ \frac{14}{20} }\approx35^o$

Part B:

<span>If the landing of each step is changed to 17 inches and the elevation of each step to 21 inches, the new angle of elevation for the staircase is given by

</span><span> $Angle\ of\ elevation=\tan^{-1}{ \frac{Vertical\ rise}{landing} } \\ \\ =\tan^{-1}{ \frac{17}{21} }\approx39^o$ </span>

5 0

3 years ago

Give the types of quantities

Sergeeva-Olga [200]

Magnitude (how much) and multitude (how many), the two principal types of quantities, are further divided as mathematical and physical.

7 0

3 years ago

HELP HURRY PLS Which shows the reflection of the figure over the given line

Lady_Fox [76]

the second one I believe

5 0

3 years ago

Read 2 more answers