Mathematics, 12.10.2019 20:30 aamu15

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Answer from: Nicky156

Problem 1 : Option B, x = 9

Problem 2: Option A, r = 45

Problem 3: Option D, m = 7

Problem 4: Option B, b/2 - 4 = 9; Total Bill was $26

Problem 5: Option C, 3h + 5 = 11; h = 2

Step-by-step explanation:

Problem 1

Step 1: Add 3 to both sides

2x - 3 + 3 = 15 + 3

2x = 18

Step 2: Divide both sides by 2

2x / 2 = 18 / 2

x = 9

Option B, x = 9

Problem 2

Step 1: Add 4 to both sides

r/3 - 4 + 4 = 11 + 4

r/3 = 15

Step 2: Multiply both sides by 3

r/3 * 3 = 15 * 3

r = 45

Option A, r = 45

Problem 3

Step 1: Subtract 7 from both sides

7 + 3m - 7 = 28 - 7

3m = 21

Step 2: Divide both sides by 3

3m / 3 = 21 / 3

m = 7

Option D, m = 7

Problem 4

Step 1: Make an expression

b/2 -> You and your friend

-4 -> You owe to your friend

9 -> Total your friend gives you

Equation: b/2 - 4 = 9

Step 2: Add 4 to both sides

b/2 - 4 + 4 = 9 + 4

b/2 = 13

Step 3: Multiply both sides by 2

b/2 * 2 = 13 * 2

b = $26

Option B, b/2 - 4 = 9; Total Bill was $26

Problem 5

Step 1: Make an expression

3h -> 3 dollars an hour

+5 -> Initial cost

11 -> Total Cost

Equation: 3h + 5 = 11

Step 2: Subtract 5 from both sides

3h + 5 - 5 = 11 - 5

3h = 6

Step 3: Divide both sides by 3

3h / 3 = 6 / 3

h = 2

Option C, 3h + 5 = 11; h = 2

Answer from: nightwolf8999

1. B, x = 9 2. A, r = 45 3. D, m = 7 4. B, b/2 - 4 = 95. C, 3h + 5 = 11; h = 2

Step-by-step explanation:

2x - 3 = 15

2x - 3 + 3 = 15 + 3

2x = 18

x = 18/2

x = 9

2 . r/3 - 4 = 11

r/3 - 4 + 4 = 11 + 4

r/3 = 15

r = 15 * 3

r = 45

3 . 7 + 3m = 28

7 + 3m - 7 = 28 - 7

3m = 21

m = 21/3

m = 7

4 . b/2 - 4 = 9

let b/2 You and your friend

-4 You owe to your friend

9 Total your friend gives you

b/2 - 4 + 4 = 9 + 4

b/2 = 13

b = 13 * 2

b = $26

5 . 3h + 5 = 11

let

3h = 3 dollars per hour

+5 Initial cost

11 Total Cost

3h + 5 - 5 = 11 - 5

3h = 6

h = 6 / 3

h = 2

Answer from: Quest

see attached

step-by-step explanation:

given the function as;

$f(x)=2x^3-7x^2+2x+3$

write the equation replacing f(x) with y

$y=2x^3-7x^2+2x+3$

form and fill a table containing values of y with corresponding values of x

you can take a range for values of x as -3≤x≤3

solving for x=-3

$f(-3)=2*-3^3-7*-3^2+2*-3+3=2*-27-63+-6+3=-54-63-6+3y=-120$

for x=-2

$f(-2)=2*-2^3-7*-2^2+2*-2+3=2*-8-28+-4+3=-16-28-4+3=-45$

repeat the same procedure to get the values of y for the remaining ,x=-1 to x=3

plot the values of y against values of x and obtain the following graph

Answer from: Quest

what is

step-by-step explanation:

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