3 years ago

Please help! How do I solve this

Mathematics

1 answer:

Monica [59]3 years ago

8 0

Answer:

(x,y) --> (-1, -3)

Step-by-step explanation:

Solve by elimination...

2x - 3y = 7

4x + y = -7 (times 3; so -3y and 3y cancel out)

2x - 3y = 7

12x + 3y = -21

2x = 7

12x = -21

add together...

14x = -14

x = -1

plug x into one of the original equations and solve for y...

-2 - 3y =7

-3y = 9

y = -3

You might be interested in

Given that f(x) = x2 – 3x - 10 and g(x) = x – 5, find (f - g)(x) and express

Roman55 [17]

Answer:

$(f-g)(x)= x^2-4x-5$

Step-by-step explanation:

We have the two functions:

$f(x)=x^2-3x-10\text{ and } g(x)=x-5$

And we want to find (f-g)(x).

(f-g)(x) is equivalent to f(x)-g(x).

Therefore:

$\begin{aligned} (f-g)(x)&=f(x)-g(x)\\ &=(x^2-3x-10)-(x-5)\end{aligned}$

Simplify:

$\begin{aligned} &=x^2-3x-10-x+5 \\ &=(x^2)+(-3x-x)+(-10+5) \\ &=x^2-4x-5\end{aligned}$

Therefore:

$(f-g)(x)= x^2-4x-5$

8 0

2 years ago

Read 2 more answers

Please help me on that question for my Algebra. I don't understand it.

tigry1 [53]

13 quarters = 13 *0.25 = 3.25

3.60 - 3.25 = 0.35

0.35 = 0.25 +0.10

he has 1 dime and 14 quarters

Answer is B

5 0

3 years ago

Read 2 more answers

Find the volume of the prism

Kisachek [45]

Answer:

V= l x b x h

= 9cm x 6cm x 12cm

=648

7 0

3 years ago

Find the local and global extrema for the graph of ƒ(x) = x(25 – x).

Allisa [31]

fx=25x-x²

dy/dx=0

25-2X=0

(=)X=14,5

4 0

3 years ago

5 times the sum of 8 and d

SVETLANKA909090 [29]

Answer:

Step-by-step explanation:

To write Five times the sum of a number and one you first make "a number" into a variable. In this case let's call it

Next let's create the sum of a number and one. This would be:

Then to get five times this number we need to multiple this expression by five to get:

⋅

(

)

5 0

3 years ago

Please help! How do I solve this ​

Please help! How do I solve this