3 years ago

Mr. Berger assigned the following system of equations to be solved for homework.

Mathematics

1 answer:

katovenus [111]3 years ago

5 0

Answer:

x = -3

Step-by-step explanation:

2x - 3y = -12 ------------------(i)

4x + y = -10 -------------------(ii)

Multiply the (ii) equation by 3 and then add the two equations. So, now y will be eliminated and you will get the value of x

(i) 2x - 3y = -12

(ii) * 3 12x + 3y = -30

14x = - 42

x = -42/14

x = -3

You might be interested in

What is the slope of the line? slope = 1/3 slope = -3 slope = 3

bija089 [108]

Answer:

Step-by-step explanation:

Rise over run

6 0

3 years ago

Read 2 more answers

❗️❗️❗️❗️❗️PLEASE HELP SIMPLE INTEREST!! Lesson 6.7 ❗️❗️❗️❗️

Flura [38]

1200 * 0.05 * 4 = 240$ the amount of interest after 4 years.

total 1200+240=1440$

4 0

3 years ago

4. *Each pair of polygons is similar. Find the value of x.

torisob [31]

Step-by-step explanation:

since both objects and sides are similar, you can set each side equal, then you cross multiply, and do subtraction, then find x.

3 0

3 years ago

(7) Explain why 198: 1,287 and 2: 13 are equivalent ratios. Your answer I

ladessa [460]

Answer:

Because they are both multiplied.

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

The table below shows some inputs and outputs of the invertible function f etc

Snowcat [4.5K]

Answer:

$(a)\ f^{-1}(-15) = -6$

$(b)\ f^{-1}(4) + f(9)=0$

Step-by-step explanation:

Given

The attached table

$(a)\ f^{-1}(-15)$

This represents an inverse function.

So, we look into x row for its value.

i.e.

$f^{-1}(-15) = -6$

$(b)\ f^{-1}(4) + f(9)$

Just like (a)

$f^{-1}(4) = -11$ ---- by looking into the x rows

$f(9) = 11$

So:

$f^{-1}(4) + f(9)=-11 + 11$

$f^{-1}(4) + f(9)=0$

4 0

2 years ago