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3 years ago

Which number sentence is not true?

Mathematics

1 answer:

kherson [118]3 years ago

7 0

Answer:

Option A is correct option

Step-by-step explanation:

We need to find which number sentence is not true.

We will check each option.

Option A

|-20| < 20

We know that |-a|=a

20 < 20 (false)

So, this number sentence is not true.

Option B

|9| = 9

We know that |a|=a

9=9 (true)

So, this number sentence is true.

Option C

|-20|>|9|

We know that |-a|=a

20>9 (true)

So, this number sentence is true.

Option D

|9| < 20

We know that |a|=a

9<20

So, this number sentence is true.

So, Option A is correct option

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Which one will rotate the regular polygon shown onto itself?

sesenic [268]

lets draw a picture of our hexagon:

then, we can rotate 60 degrees counterclockwise (or clockwise) and get the same hexagon. So, the answer is 60 degrees

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1 year ago

Acqueline reads 25 pages every night. Which graph correctly displays y, the total number of pages that Jacqueline has read after

mrs_skeptik [129]

Answer:

On a coordinate plane, a graph titled Total Pages Jacqueline Has Read has days on the x-axis and Pages on the y-axis. A line goes through points (1, 25) and (2, 50).

Step-by-step explanation:

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3 years ago

Read 2 more answers

The ratio of money in Terry's bank account to Faye's bank account was 3:7.

igor_vitrenko [27]

Answer:

£390

Step-by-step explanation:

The ratio of money in bank:

Terry : Faye

3 : 7

Terry put £220 in his account

Faye withdrew £300 from her account

Unknown:

Initial amount Terry had = ?

Solution:

Let the real amount terry has = 3x

Faye will have = 7x

Now;

3x + 220 = 7x -300

Solving this equation:

3x + 220 = 7x -300

3x - 7x = -300 - 220

-4x = - 520

4x = 520

x = 130

Originally, Terry has 3x = 3 x 130 = £390

3 0

3 years ago

Identify the linear term in the function of y = 2x2 − 5x − 12

MakcuM [25]

Answer:

The linear term is -5x

Step-by-step explanation:

The linear term is the term that has the degree equal to 1.

The given function is

y = 2x^2 − 5x − 12

here 2x^2 = quadratic term i.e having degree 2

-5x = linear term i.e having degree 1

-12 = constant

so, The linear term is -5x

4 0

3 years ago

The height H of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 9

mariarad [96]

Answer:

The ball will be 84 feet above the ground 1.125 seconds and 4.5 seconds after launch.

Step-by-step explanation:

Statement is incorrect. Correct form is presented below:

The height $h(t)$ of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 90 feet per second is given by equation $h(t) = 3 +90\cdot t -16\cdot t^{2}$ , where $t$ is time in seconds. After how many seconds will the ball be 84 feet above the ground.

We equalize the kinematic formula to 84 feet and solve the resulting second-order polynomial by Quadratic Formula to determine the instants associated with such height:

$3+90\cdot t -16\cdot t^{2} = 84$

$16\cdot t^{2}-90\cdot t +81 = 0$ (1)

By Quadratic Formula:

$t_{1,2} = \frac{90\pm \sqrt{(-90)^{2}-4\cdot (16)\cdot (81)}}{2\cdot (16)}$

$t_{1} = 4.5\,s$ , $t_{2} = 1.125\,s$

The ball will be 84 feet above the ground 1.125 seconds and 4.5 seconds after launch.

3 0

3 years ago