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dangina [55]
3 years ago
7

4x2 – 13x = 7x – 25 solve an equation with two real solutions practice

Mathematics
2 answers:
Phoenix [80]3 years ago
8 0

Answer:

x=2.5

Step-by-step explanation:

bring all terms to one side

4x^{2} -20x+25=0

factor it

(2x-5)^{2}=0

2x-5=0

2x=5

x=2.5

jenyasd209 [6]3 years ago
8 0

Answer:

20/33

Step-by-step explanation:

4*2-13x=7x-25

8-13x=7x-25

(subtract 7 x's)

8-20x= -25

(subtract 8)

-20x= -33

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Scientists have found a relationship between the temperature and the height above a distant planet's surface. , given below, is
Liula [17]

Answer:

1) Option B is correct.

The inverse of the function, T⁻¹(x), represents the The height above the surface (in kilometers) when the temperature is x degrees Celsius.

2) T⁻¹(x) = 12.2 - 0.4x

3) T⁻¹(15) = 6.2 m

Step-by-step explanation:

1) The inverse of a function is a function that reverses the effects of the original function on the variable that determines the original function's value.

T(h) = 30.5 - 2.5h

The original function takes the height in kilometres and converts it to temperature at that point in degree Celsius, So, the inverse function will take the temperature in degree Celsius and produce the corresponding height in kilometres.

So, it is the The height above the surface (in kilometers) when the temperature is x degrees Celsius.

The inverse functuon is given as T⁻¹ (x)

2) To obtain T⁻¹(x)

T(h) = 30.5 - 2.5h

We make h the subject of formula

2.5h = 30.5 - T

h = (30.5 - T)/2.5

h = 12.2 - 0.4T

T⁻¹(x) = 12.2 - 0.4x

3) T⁻¹(x) = 12.2 - 0.4x

when x = 15°C

T⁻¹(15) = 12.2 - 0.4(15) = 6.2 m

6 0
4 years ago
What is the y-intercept?​
Reika [66]

Answer:

(0, 9)

Step-by-step explanation:

The y-intercept is the point when x = 0. By looking at the graph, when x = 0, y = 9. Therefore, the y-intercept of the line is (0, 9).

7 0
3 years ago
PLEASE HELP ASAP!!!!! WILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER!!!!!
Tasya [4]
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The equations are written in point-slope form. Which equation represents a line through points (-8, 3) and (2, -3)?
Lubov Fominskaja [6]
The correct answer is B.
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4 years ago
The value of a company in millions of dollars during its first 10 years increased by 2% each year.The original valuation of the
solong [7]

Answer:

Step-by-step explanation:

The rate at which the value of the company increased is exponential.

We would apply the formula for exponential growth which is expressed as

A = P(1 + r)^t

Where

A represents the value of the company after t years.

t represents the number of years.

P represents the initial value of the company.

r represents rate of growth.

From the information given,

P = 2.1 million

r = 2% = 2/100 = 0.02

t = x years

The function to represent the value of the company, x years after being founded is

A = 2.1 × 106(1 + 0.02)^x

Therefore, the worth of the company in 6 years is

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2364941

The worth of the company in 2 years is

A = 2.1 × 10^6(1 + 0.02)^2

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A = 2184840

The difference in worth of the company after 6 years and after 2 years is

2364941 - 2184840 = $180101

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3 years ago
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