4 years ago

Solve the following linear system by graphing 4x+5y=10 3x-3y=21

Mathematics

1 answer:

Inga [223]4 years ago

6 0

Answer:

y = 2

x = 5

Step-by-step explanation:

4x + 5y = 10 | ×3 |

3x - 3y = 21 | ×4 |

12x + 15y = 30

12x - 12y = 84

____________--

27y = -54

y = -54/27

y = 2

4x + 5y = 10 | ×3 |

3x - 3y = 21 | ×5 |

12x + 15y = 30

15x - 15y = 105

____________+

27x = 135

x = 135/27

x = 5

You might be interested in

A side of the triangle below has been extended to form an exterior angle of 128°. Find the value of x.

hjlf

First you take the 128 and subtract it from 180. You then take the angle that’s vertical from it and place the number (52) and you add 52 + 24 to get 76. After that you take 76 and subtract it from 180 to get 104. X=104

4 0

3 years ago

Need help on this please

Alex787 [66]

3 is the first one.
-1 is the 2nd
and 7 is the 3rd

3 0

4 years ago

A) Solve t + t + t = 15

soldi70 [24.7K]

Answer:

3t=15

t=15/3=5

3 0

3 years ago

Read 2 more answers

Veronica has $2.80, which consists of only quarters and nickels. If the number of quarters is half the number of nickels, how ma

sdas [7]

C.24; Veronica has 8 quarters and 16 nickels

3 0

4 years ago

The cone pictured has a surface area of ? square meters. (Use 3.14 for π .)

postnew [5]

Answer:

268.34 m^2

Step-by-step explanation:

4 0

4 years ago

Read 2 more answers