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3 years ago

Which equation is not equivalent

Mathematics

1 answer:

liraira [26]3 years ago

8 0

Answer:

Step-by-step explanation:

(2x+3)(x+4) = 2x² + 8x + 3x + 12

= 2x² + 11x + 12 ≠ 2x² + 10x + 12

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The height of a tree is 56 inches. After 5 years, the height is 10 feet 11 inches. How many inches did the tree grow each year?

ra1l [238]

The tree grows 15 inches each year

<h3>Calculating the rate of growth </h3>

From the question, we are to determine how many inches the tree grows each year

First, we will calculate the difference in height

Initial height = 56 inches

Final height = 10 feet 11 inches = 131 inches

Difference in height = 131 inches - 56 inches

Difference in height = 75 inches

Now, for the rate at which the tree grows each year,

The rate at which the tree grows each year = 75 inches / 5 year

The rate at which the tree grows each year = 15 inches/year

Hence, the tree grows 15 inches each year.

Learn more on Calculating rate of growth here: brainly.com/question/15214747

#SPJ1

6 0

2 years ago

Find the x intercept and y intercept x + 18 = 9y .

Natalka [10]

First you need to put it into y=mx+b format and which is 1/2x + 2 =y. The y intercept should be b in the equation y=mx +b so y=2. The x-intercept should be when y=0 and x equals a number which is x=-4. X-intercept=-4 and y-intercept=2.

7 0

3 years ago

Read 2 more answers

Explain how to to evaluate multi-step expressions involving positive and negative decimals.

GrogVix [38]

Answer:

Hope this helps! (:

Step-by-step explanation:

By putting the numbers in the given equation,

2x + 3 + 3x = 7x + 9

5x + 3 = 7x + 9

(5x + 3) - 7x = (7x + 9) - 7x

(5x - 7x) + 3 = 9

-2x + 3 = 9

(-2x + 3) - 3 = 9 - 3

-2x = 6

-x = 3

x = -3

Therefore, our equation is correct which has a negative result.

In place of 6 if we use 8, value of x will be negative again.

7 0

2 years ago

Read 2 more answers

1. 72% of the students in Math 6 at AZVA are currently passing mastering their lessons. If 324 students are currently mastering

Alexeev081 [22]

Answer:

1. a. 72/100 = 324/x

72x = 32,400

b. 450 students are in Math 6

2. a. o = 3b

b. o = 3 pounds

3. a. Most popular animals:

A. Dogs - 67%

B. Cats - 20%

C. Other - 8%

D. None - 4%

E. Horses - 1%

b. 20 students

c. If 75 students have cats, the estimate of 250 students isn't correct.

The actual number of students interviewed is 375.

Step-by-step explanation:

1. a. Let's use the following equation to solve the question:

x = Students that are in Math 6

72/100 = 324/x

72 * x = 324 * 100

72x = 32,400

b. Let's solve the equation, as follows:

x = 32,400/72

x = 450

450 students are in Math 6

2. a. The equation is:

o = 0.15 *20b

o = 3b

where, o = weight of oats in pounds and b = number of dog food bags

b. Let's find out the weight of the oats in one dog food bag, using our equation:

o = 0.15 *20b

o = 0.15 *20 * 1

o = 3 pounds

3. a. Most popular animals:

A. Dogs - 67%

B. Cats - 20%

C. Other - 8%

D. None - 4%

E. Horses - 1%

b. If 250 students were interviewed, the 8% who answered "other" are:

8% of 250 = 0.08 * 250 = 20 students

c. If 75 students have cats, the estimate of 250 students isn't correct.

The 20% of 250 is 50, not 75.

0.2 * 250 = 50

The actual number of students interviewed is:

x = Actual number of students interviewed

75/x = 20/100

20x = 7,500

x = 7,500/20

x = 375

The actual number of students interviewed is 375.

3 0

3 years ago

Find the area of the smaller sector (please help me(

Evgen [1.6K]

54 cm square.........

7 0

4 years ago