All categories

3 years ago

Its add math. i really need help, solve the question. thanks♥️

Mathematics

1 answer:

dexar [7]3 years ago

6 0

Answer:

see explanation

Step-by-step explanation:

Given

f(x) = ax + b

x = 2 → f(x) = 1 and x = - 1 → f(x) = - 5 ( from the table )

Substitute these values into f(x) = ax + b, that is

2a + b = 1 → (1)

- a + b = - 5 → (2)

Subtract (2) from (1) term by term to eliminate b

3a = 6 ( divide both sides by 3 )

a = 2

Substitute a = 2 into (2) and evaluate for b

- 2 + b = - 5 ( add 2 to both sides )

b = - 3

(b)

When x maps onto itself then

ax + b = x, that is

2x - 3 = x ( subtract x from both sides )

x - 3 = 0 ( add 3 to both sides )

x = 3

Thus a = 2, b = - 3 and x = 3

You might be interested in

so There are 17 girls and 119 boys on a class field trip to the museum. The students need to be broken up into the largest possi

Step2247 [10]

1 student in each group with 126 groups in total

8 0

3 years ago

Idently the graph of f(x) = 3(x - 1) - 4. Then identity the vertex and ads of symmetry find the minimum value of and describe wh

Vesna [10]

Answer:

See below

Step-by-step explanation:

I assume you mean $f(x) = 3(x-1)^2-4$

The equation is already in vertex form $f(x)=a(x-h)^2+k$ where $a$ affects how "fat" or "skinny" the parabola is and $(h,k)$ is the vertex. Therefore, the vertex is $(h,k)\rightarrow(1,-4)$ .

The axis of symmetry is a line where the parabola is cut into two congruent halves. This is defined as $x=h$ for a parabola with a vertical axis. Hence, the axis of symmetry is $x=1$ .

The minimum value is the smallest value in the range of the function. In the case of a parabola, the y-coordinate of the vertex is the minimum value. Therefore, the minimum value is $y=-4$ .

The interval where the function is decreasing is $(-\infty,1)$

The interval where the function is increasing is $(1,\infty)$

8 0

3 years ago

Solve: k /8 + 1 − = −19

Sonja [21]

Answer:

k = -144

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Write each of the following as a polynomial in descending powers of its variable

nikklg [1K]

1. 7x(x + 3)
    7x(x) + 7(3)
    7x² + 21

2. (7x + 1)(x + 3)
    7x² + 21x + x + 3
    7x² + 22x + 3

3. (x² + x)²
    (x² + x)(x² + x)
   x^4 + x³ + x³ + x²
   x^4 + 2x³ + x²

4 0

3 years ago

Please help me with this question!

Alla [95]

Answer: 45 ft

Step-by-step explanation:

and 15ft add 10ft to get 25ft

then subtract 70 from 25

4 0

3 years ago

Its add math. i really need help, solve the question. thanks♥️​

Its add math. i really need help, solve the question. thanks♥️