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3 years ago

How to eliminate this using multiplication?

1 answer:

5 0

-2a + 3b = 9 / x 2;

-4a + 6b = 18;

Then, -4a + 6b = 18
+4a - 2b = 3
__________________(+)

We obtain 4b = 21;

b = 21/4;

-2a + 63/4 = 9;

-8a + 63 = 36;

-8a = - 27;

a = 27/8 ;

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Can i get a step by step for this?

jonny [76]

Answer:

x = 85°

Step-by-step explanation:

Sum of interior angles of any triangle is 180°:

52° + 43° + x = 180°
95° + x = 180°
x = 180° - 95°
x = 85°

8 0

3 years ago

BRAINLIEST WILL I GIVE HURRY

stepladder [879]

Answer:

{10,8}

Step-by-step explanation:

-3x + 4y = -62

4x + 5y = 0

let's eliminate the x

-3x + 4y = -62 | x -4 |

4x + 5y = 0 | x 3 |

12x - 16y = 248

12x + 15y = 0

-------------------- -

-31y = 248

y = 248/(-31) = 8

since you must do this proble with elimination, we cant use subtitution. so we repeat the way once more to find x (eliminate y)

-3x + 4y = -62 | x 5 |

4x + 5y = 0 | x 4 |

-15x + 20y = -310

16x + 20y = 0

-------------------- -

-31x = -310

x = -310/-31 = 10

4 0

3 years ago

Please help me on math homework! File attached! :D

r-ruslan [8.4K]

Use pythagorena theorme

D= $\sqrt{(x1-x2)^{2}+(y1-y2)^{2}}$
NOTE: x1 and x2 means the first x and second x, not x^1 and x^2

points given are
(1,1)
(5,6)
x1=1
y1=1
x2=5
y2=6
D= $\sqrt{(1-5)^{2}+(1-6)^{2}}$
D= $\sqrt{(-4)^{2}+(-5)^{2}}$
D= $\sqrt{16+25}$
D= $\sqrt{41}$
6.403

answer is B

7 0

3 years ago

Read 2 more answers

. Find the range of the data. 7,4, 12, 1, 8, 8, 4, 14, 13, 9, 11, 10, 2,7,5, 3, 1, 8,5,3

Burka [1]

Answer:

Range: 13

Step-by-step explanation:

Population size:20

Lowest value: 1

Highest value: 14

Answer: 13