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Ghella [55]
3 years ago
13

Berta worked to solve a system of equations. 4x + y = –5 x – y = –5 Step 1: ??? Step 2: x = –2 Step 3: 4(–2) + y = –5 Step 4: –8

+ y = –5 Step 5: y = 3 Berta determined that the solution is (–2, 3). Which could have been the equation Berta found in step 1?

Mathematics
2 answers:
PolarNik [594]3 years ago
8 0
4x + y = -5
 x -  y  = -5     Adding;_
5x = -10
x = -2

required equation is 5x = -10
Lemur [1.5K]3 years ago
7 0
5x= -10
I hope I could help.

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Could you please answer this precisely. Thank you!
OleMash [197]

The mathematical functions (equations) are matched to their graph line respectively as follows:

  • y = 960 - 78x: purple straight line.
  • y = 8·3^x: violet line curve that slopes to the left.
  • y = 960·(1/2)^x: green line curve that slopes to the right.

<h3>What is a linear function?</h3>

A linear function can be defined as a type of function whose equation is graphically represented by a straight line on the cartesian coordinate. Mathematically, a linear function is given by this equation:

y = mx ± c.

<h3>What is an exponential function?</h3>

An exponential function can be defined as a type of mathematical function whose values are generated by a constant that is raised to the power of the argument. Mathematically, an exponential function is represented by this formula:

f(x) = keˣ

Next, we would match each of the mathematical functions (equations) to their graph line respectively as follows:

  • y = 960 - 78x: purple straight line.
  • y = 8·3^x: violet line curve that slopes to the left.
  • y = 960·(1/2)^x: green line curve that slopes to the right.

Read more on graphs here: brainly.com/question/24298987

#SPJ1

3 0
2 years ago
An event that cannot happen is <br><br> a certain<br> b possible <br> c impossible
Kamila [148]
An event that cannot happen is impossible
8 0
3 years ago
Read 2 more answers
What is the point slope form of an equation with the slope 3/5 and goes through point (2,4)?
pantera1 [17]
The point slope form of the equation  is y-4 = 3/5 (x-2)
3 0
3 years ago
A game decreased in price by 1 5 . After the reduction it was priced at £48. What was the original price of the game?
vovikov84 [41]

Answer:

£63

Step-by-step explanation:

when we subtract 15 from 48 ,we get 63 which is the answer.

8 0
3 years ago
Y=-0.72x + 7.7<br> Find y when x = 3.5.
OLEGan [10]

Answer:

y = 5.18

Step-by-step explanation:

replace x in the equation with 3.5

y = -0.72x + 7.7

y = -0.72(3.5) + 7.7

y = -2.52 + 7.7

y = 5.18

7 0
3 years ago
Read 2 more answers
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