All categories

4 years ago

Solutions to 2 variables equations

Mathematics

1 answer:

pychu [463]4 years ago

8 0

Answer:

C) both

Step-by-step explanation:

-4x+7=2y-3

Plug in

(2,1)

-4(2) +7 = 2(1)-3

-8 + 7 = 2 - 3

-1 = -1

So (2,1) is the solution

(5,-5)

-4(5) +7 = 2(-5)-3

-20 + 7 = -10 - 3

-13 = -13

So (5,-5) is the solution

Answer:

C) both

You might be interested in

A pair of equations is shown below.

Ivenika [448]

Answer:

(2,3)

Step-by-step explanation:

desmos is a great graphing app if you ever have another question like that you can put the equations in and see the graphs inputs.

5 0

3 years ago

Without graphing the linear functions, find the coordinates of the point of intersection of their graphs: y=3x−11 and y=4

egoroff_w [7]

Answer:

(5, 4)

Step-by-step explanation:

given the 2 equations

y = 3x - 11 → (1)

y = 4 → (2)

Substitute y = 4 into (1)

3x - 11 = 4 ( add 11 to both sides )

3x = 15 ( divide both sides by 3 )

x = 5

solution is (x , y) = (5, 4)

8 0

3 years ago

F(x)=5^x+1 what’s the rate of change between x=0 and x=4

nalin [4]

Answer:

156

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Functions
Function Notation
Average Rate of Change: $\displaystyle \displaystyle \frac{f(b) - f(a)}{b - a}$

Step-by-step explanation:

Step 1; Define

Identify

f(x) = 5ˣ + 1

Interval x [0, 4] →b = 4, a = 0

Step 2: Find Rate of Change

Substitute in variables [Average Rate of Change]: $\displaystyle \displaystyle \frac{f(4) - f(0)}{4 - 0}$
[Average Rate of Change] Substitute in x [Function f(x)]: $\displaystyle \displaystyle \frac{(5^4 + 1) - (5^0 + 1)}{4 - 0}$
(Parenthesis) Evaluate exponents: $\displaystyle \displaystyle \frac{(625 + 1) - (1 + 1)}{4 - 0}$
(Parenthesis) Add: $\displaystyle \displaystyle \frac{626 - 2}{4 - 0}$
[Fraction] Subtract: $\displaystyle \displaystyle \frac{624}{4}$
Divide: $\displaystyle \displaystyle 156$