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irinina [24]
2 years ago
14

Help me out with this equation would be very helpful

Mathematics
1 answer:
Lisa [10]2 years ago
3 0

Answer:

I think its C

Step-by-step explanation:

I could be wrong

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5x - y = -7<br> 4x + 2y = – 14
shtirl [24]

Answer:

\boxed{\sf \ \ x=-2, \ y=-3 \  \ }

Step-by-step explanation:

Hello,

<u>I assume that you want to solve this system of two equations</u>

   (1) 5x - y  = -7

   (2) 4x + 2y = -14

We will multiply (1) by 2 and add to (2) so that we can eliminate the terms in y

2*(1)+(2) gives

   10x - 2y + 4x + 2y = -7*2 -14 = -14 - 14 = -28

   <=>

   14x = - 28 we can divide by 14 both parts

   x = -28/14 = -2

and then we replace x in (1)

   5*(-2)-y=-7

   -10-y=-7 add 7

   -10-y+7=0

   -3-y=0 add y

   -3 = y

which is equivalent to y = -3

do not hesitate if you have any question

4 0
3 years ago
Read 2 more answers
3.695 to 4 name the place value to which each number was rounded
oksian1 [2.3K]
In this, 3.695 to 4, the tenths was rounded
5 0
3 years ago
Read 2 more answers
The earth exerts a gravitational force of F(f)=(2.99x10^16)/r^2 newtons on an object with a mass of 75kg located r meters from t
QveST [7]
Umm this should be in physics but F is proportional to 1/r^2 I am assuming you want to just take the derivative in respect to r of both sides of the equation

 F = (2.99x10^16)/r^2
So you do that and you get 
dF/dr = -2(2.99 * 10 ^16)/ (r^3)

is this for calc class? 
6 0
3 years ago
Easy simple math<br><br> 39.99 x 7.25
Firlakuza [10]

Answer:

289.92

Step-by-step explanation:

Multiply the numbers together

4 0
2 years ago
Read 2 more answers
Help! I'm not sure how to set this up. Here is the question; Faye paid $16.00 for a pair of shorts that were 20% off. What was t
IrinaVladis [17]
80/100*n=16

80n=1600

n=1600/80=160/8=20

---------------------------------------

Original price: $20.00
6 0
3 years ago
Read 2 more answers
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