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djverab [1.8K]
3 years ago
6

How do i solve x² + x - 2

Mathematics
1 answer:
jeka943 years ago
8 0
Square x first then add x then subtract by 2
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Write an exponential model given the points ( 7, 12 ) and ( 8, 25 ). Round to the nearest hundredth.
inna [77]

Answer:

The exponential model is y = 0.07\cdot e^{0.73\cdot x}.

Step-by-step explanation:

The exponential model can be modelled by the following mathematical expression:

y = A\cdot e^{B\cdot x} (1)

Where:

x - Independent variable.

y - Dependent variable.

A, B - Coefficients.

If we know that (x_{1}, y_{1}) = (7,12) and (x_{2}, y_{2}) = (8,25), then we get the following system of equations:

A\cdot e^{7\cdot B} = 12 (2)

A\cdot e^{8\cdot B} = 25 (3)

If we divide (3) by (2), we calculate the value of B:

e^{B}=\frac{25}{12}

B = \ln \frac{25}{12}

B \approx 0.734

And by (2), we determine the value of A:

A = 12\cdot e^{-7\cdot B}

A = 0.0704

The exponential model is y = 0.07\cdot e^{0.73\cdot x}.

4 0
2 years ago
write the slope - intercept equation of the line that passes through the point (6, "-1)" and has a slope of "-1/3"
TEA [102]

Answer:

y = - \frac{1}{3} x + 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = - \frac{1}{3} , then

y = - \frac{1}{3} x + c ← is the partial equation

To find c substitute (6, - 1 ) into the partial equation

- 1 = - 2 + c ⇒ c = - 1 + 2 = 1

y = - \frac{1}{3} x + 1 ← equation of line

8 0
3 years ago
Can you guys help me when you have time
hodyreva [135]

Answer:

c

Step-by-step explanation:

the reasoning for this is because it is technically 2 squared times 3 but 2x2x3 is the same thing

4 0
3 years ago
Read 2 more answers
Can somebody tell me the answer to these question please
strojnjashka [21]

Answer:

Step-by-step explanation:

2) Take the number you see (7). How many 7s are there? There are three.

7 x 3

3) What number do you see? 3. How many 3s? Five 3s.

3 x 5

Now you try

4 0
2 years ago
Read 2 more answers
A ladder, with its foot in the street, makes an angle of 30 degrees with the street when its top rests on a building on one side
Harrizon [31]
The answer would be 82 ft
6 0
3 years ago
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