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Sergeu [11.5K]
2 years ago
6

Given f (x) = 2x² +1evaluate f (-1).

Mathematics
2 answers:
soldi70 [24.7K]2 years ago
8 0

Answer:

3

Step-by-step explanation:

f(x) = 2x^2 + 1

f(-1) means that wherever you see an x on the right hand side, you substitute -1.

f(-1) = 2(-1)^2 + 1 = 2 + 1 = 3

Andreyy892 years ago
3 0
The answer is 3 I checked!!!!!!!!!!
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Step 1: -3(+ 2) = 5(x - 7)
madam [21]

Answer:

The answer is Steps 1 and 2.                                Step 1: -3(x+2) = 5(x-7)

                                                                               Step 2: -3x-6 = 5x-35

Step-by-step explanation:

4 0
3 years ago
A researcher wants to know if there is a relationship between the number of shopping centers in a state and the retail sales (in
sesenic [268]

Answer:

Kindly check explanation

Step-by-step explanation:

Given the data:

Num shopping centers (X) :

630

370

616

700

430

558

1200

2976

Sales (Y) :

15.5

7.5

13.9

18.7

8.2

13.2

23.0

87.3

The regression equation obtained using the online regression calculator is :

y = 0.03025X - 4.87014

2.) The slope value, for every unit change in number of shopping centers, the number of sales increases by 0.03025

3.)

The Coefficient of determination (R²) as obtained by the R² value calculator is : 0.9823

4.)

About 98%  of variation in number of sales is explained by the regression line

5.)

Correlation Coefficient = 0.9911

H0 : p ≥ 0.99

H1 : p < 0.99

3 0
2 years ago
Need help with this
Vlad1618 [11]

Answer:

Step-by-step explanation:

5 0
3 years ago
PEOPLE WHO ARE GOOD AT MATH CAN YOU PLEASE HELP ME!!!
OlgaM077 [116]

The cost of using 19 HCF of water is $32.49

Given in the question:

The monthly cost (in dollars) of the water use (in dollars) is a linear function of the amount of water used (in hundreds of cubic feet, HCF)

The cost for using 17 HCF of water is using $32.13

and, the cost of using 35 HCF is $61.83.

To find the cost of using 19 HCF of water.

Now, According to the question:

The cost for using 17 HCF of water is  $32.13

and, the cost of using 35 HCF is $61.83.

To find the slope:

(17, 32.13) and (35, 61.83)

Slope = (61.83 - 32.13)/ (35 - 17) = 1.65

We know that:

Formula of slope :

y = mx + b

32.13 = 1.65 x 17 + b

b = 1.14

The equation will be :

C(x) = 1.65x + 1.14

Now, To find the cost of using 19 HCF of water.

C(19) = 1.65 × 19  + 1.14

C(19) = $32.49

Hence,  the cost of using 19 HCF of water is $32.49.

Learn more about Slopes at:

brainly.com/question/3605446

#SPJ1

6 0
1 year ago
ASAPPPP
DedPeter [7]

Answer:

C. Subtraction property of equality

Step-by-step explanation:

6 0
2 years ago
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