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3 years ago

Is the point (2, 2 1/2) on the graph of y=x+2? How do you know?

Mathematics

1 answer:

Ksenya-84 [330]3 years ago

6 0

Answer:

No, it is not on the graph.

Step-by-step explanation:

Plug in (2, 2 $\frac{1}{2}$ ) to y = x + 2

(2 $\frac{1}{2}$ ) = (2) + 2

$2\frac{1}{2} \neq 4$

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Two more than three times a number is twenty. What is that number?

spin [16.1K]

The number may be 6 because 6 • 3 = 18, and 2 more than 18 would be 20

3 0

2 years ago

Question 4 (1 point)

serious [3.7K]

Answer:

Well the answer would be 3 inches to figure it fully out my best guess is 3

Step-by-step explanation:

7 0

2 years ago

The height h in feet of a ball thrown vertically upward from the top of a 288-foot tall building is given by h=288+48t-16t^2 whe

mr Goodwill [35]

6 sec can take penny to strike the ground.

Solution:

Given data:

$H_0=288$ feet

$V_0=48$ feet

$h(t)=288+48t-16t^2$

Re-arrange the terms from greatest degree to smallest degree.

$h(t)=-16t^2+48t+288$

We can solve it by applying quadratic formula,

$$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Here a = –16, b = 48, c = 288

$$t=\frac{-48\pm \sqrt{48^2-4(-16)(288)}}{2(-16)}$

$$t=\frac{-48\pm \sqrt{2304+18432}}{-32}$

$$t=\frac{-48\pm \sqrt{20736}}{-32}$

$$t=\frac{-48\pm144}{-32}$

Now, write find two t's using plus and minus operation.

$$t=\frac{-48+144}{-32},\ \ t=\frac{-48-144}{-32}$

$$t=\frac{96}{-32},\ \ t=\frac{-192}{-32}$

t = –3 (or) t = 6

We cannot write time is negative. so neglect t = –3.

Therefore t = 6.

Hence 6 sec can take penny to strike the ground.

8 0

2 years ago

Mr. Gomez took his family to the zoo and spent $30.50 on drinks and food. He spent $14 on drinks that cost $1.75 each. He spent

OLga [1]

30.50-14= 16.50
16.50 divided by 2.75= 6
The answer is 6

8 0

2 years ago

How do you find x? and how do you round to the nearest tenth?

expeople1 [14]

Hey there!

In order to solve this problem, we can use the Pythagorean Theorem, which is $c^2 = a^2 + b^2$ . Since the Pythagorean Theorem would find only half of the length of x, we'll need to double it in the end.

First, let's plug in what we know to the Pythagorean Theorem: $2.1^2 = 1.4^2 + b^2$

Next, we'll simplify to that $b^2$ is by itself:

$b^2 = 2.45$

Then, we'll find the square root of 2.45, multiply that by 2 and round to the nearest tenth:

$2(\sqrt{2.45} ) = 3.1$

Therefore, x = 3.1 ft.

How to round to the nearest tenth:

In a decimal, the tenth is the first number after the decimal point. To round to the tenth, if the number in the hundredth place is less than 5, you keep the number as it is, but if the number in the hundredth place is more than 5, you increase the number in the tenth place by 1.

Hope this helps!! :)

6 0

2 years ago