2 years ago

Y = 3x + 10 y = -7x - 20

Mathematics

1 answer:

Katena32 [7]2 years ago

5 0

Answer:

x = -3

Step-by-step explanation:

3x + 10 = -7x -20

3x + 7x = -20 -10

10x = -30 /: (10)

x = -3

You might be interested in

What is the slope of a line with endpoints at (3,4) and (2,5)?

Lesechka [4]

$\bf (\stackrel{x_1}{3}~,~\stackrel{y_1}{4})\qquad (\stackrel{x_2}{2}~,~\stackrel{y_2}{5}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{5-4}{2-3}\implies \cfrac{1}{-1}\implies -1$

6 0

2 years ago

Read 2 more answers

14. The cost of 10 dozen of caps is Rs.800. How many caps can bebought for Rs.200.

Mashcka [7]

Answer:

Step-by-step explanation:

10 dozen is equal to 120 so ratio is 800/120 or 80/12

same ration on the other side but 200/x.Cross multiply and u get 3

7 0

2 years ago

A hiker travels 12 km in 3 h.

FinnZ [79.3K]

This is a ratio.
12 km : 3 h

simplify to-
4km : 1 h

which means the hiker traveled 4 km per 1 hour.

6 0

3 years ago

PLEASE HELP ME ITS IXL

Natasha_Volkova [10]

Answer:

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

*35 BRAINLY POINTS! BRAINLIEST TO THE FIRST CORRECT PERSON!*

kondor19780726 [428]

Answer:

C(n) = 12 + 1.5(n – 1)

Step-by-step explanation:

8 0

2 years ago