Ask question

Ask question

All categories

3 years ago

14

How can I solve the following system of equations: -4x + y= 6, -5x -y =21. I know I can cancel out but I don't know where or whe

re to go from there.

1 answer:

matrenka [14]3 years ago

7 0

-4x + y = 6
-5x - y = 21

add both of them
-9x = 27
x = -3

(-4*-3) + y = 6
-12 + y = 6
y = 18

You might be interested in

64,602 divided by 157

zavuch27 [327]

Answer:

about 411.48

Step-by-step explanation:

Use a calculator

6 0

2 years ago

Read 2 more answers

Solve the equation for x by graphing.-4x-1 5x=4

Gemiola [76]

Answer: Undefined

Step-by-step explanation:

slope is undefined

no y intercept

This line is vertical

4 0

3 years ago

14<br> 6<br> 4<br> 2<br> Y<br> -2<br> -2<br> -4

devlian [24]

Answer:

Step-by-step explanation:

5 0

3 years ago

Will mark brainlest

aleksklad [387]

Divide y by x:

150/10 = 15

135/9 = 15

30 /2 = 15

They all equal 15

This means the constant of proportionality would be y = 15x

The answer is C.

7 0

3 years ago

Read 2 more answers

Evaluate c−d if c=1 and2/5 and d=5/6 . Express your answer in simplest form.

Andrews [41]

Answer:

$\frac{17}{30}$

Step-by-step explanation:

→ Substitute in the numbers

$1\frac{2}{5} -\frac{5}{6}$

→ Simplify

$1\frac{2}{5} -\frac{5}{6}=\frac{7}{5} -\frac{5}{6}=\frac{42}{30} -\frac{25}{30} =\frac{17}{30}$

5 0

2 years ago