All categories

2 years ago

2x + y = ?x = -3 y = 4

Mathematics

1 answer:

Marta_Voda [28]2 years ago

8 0

Answer:

-2

Step-by-step explanation:

Since,

it given that

x = -3

y = 4

and the equation is:

2x + y = ?

Thus we can substitute:

2(-3) + 4 = ?

-6 + 4 = -2

Hence,

? = -2

Kavinsky

You might be interested in

Answer choices 50% 60% 65% If you put a link I will report

hodyreva [135]

Answer:

50%

Step-by-step explanation:

6 0

3 years ago

4x - 3y = -28 x + 5y = 39 cant seem to be able to figure the answer for this

Rus_ich [418]

value of x = -1 and value of y=8

Step-by-step explanation:

We need to solve the system of equations:

$4x - 3y = -28\,\,\,(1)\\x + 5y = 39\,\,\,(2)$

Multiply eq(2) with 4 and subtract with eq(1)

$4x-3y=-28\\4x+20y=156\\-\,\,\,-\,\,\,\,\,\,\,\,\,\,\,\,\,\,-\\--------\\-23y=-184\\y=\frac{-184}{-23}\\y=8$

So, value of y=8

Now, finding value of x by putting value of y in equation 2

$x+5y=39\\x+5(8)=39\\x+40=39\\x=39-40\\x=-1$

So, value of x = -1

value of x = -1 and value of y=8

Keywords: System of Equations

Learn more about System of Equations at:

#learnwithBrainly

4 0

3 years ago

In order to buy a $38 pair of shoes, you have to borrow $16 from your friend. How much money did you start with

Aleksandr-060686 [28]

Answer:

22 dollars

Step-by-step explanation:

38 - 16 = 22

if they cost 38 subtract the amount you borrowed(16) and you get what you started with(22)

7 0

3 years ago

Read 2 more answers

Which is a better buy?

pav-90 [236]

Answer: I would say to go with "2-cup carton of pineapple juice for $1.04"

Step-by-step explanation:

If you want more pineapple juice for a cheaper price go with 2-cup carton for $1.04 The reason I say this is because 2 quarts equal 8 cups, so if you multiply the 2 cups and price by 4 you get 8-cups= $4.16 which is cheaper.

3 0

4 years ago

A= 1/2bh if b=3 in. And h= 8 in., what is the area of the triangle?

Valentin [98]

This becomes: A = 1/2 * (3) * (8 ) = 1/2 * 24 = 12
So the area is 12.
Hope this helps!
Brainliest Please!

4 0

3 years ago

2x + y = ?x = -3 y = 4​

2x + y = ?x = -3 y = 4