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2 years ago

PLEASE HELP DUE TONIGHT

Mathematics

1 answer:

lukranit [14]2 years ago

6 0

The height & speed are mathematically given as

t = 0.2 s

u = 4 m/s

<h3>What is the height & speed?</h3>

Generally, the equation for height is mathematically given as

h = 0.2gt^2

Therefore

0.2 = 0.5 * 9.8 * $t^2$

0.2 = 4.9 * $t^2$

t = 0.2 s

In conclusion, the initial speed is

s = ut

Therefore

u = 0.8 / 0.2

u = 4 m/s

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3. In the following equation, what is the y-intercept?<br> y = -3x + 7

aev [14]

Answer:

the y intercept at this point is 7

Step-by-step explanation:

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5 0

3 years ago

In a continuous series, mean(x) = 80, assumed mean(A) = 60 and<br>EF=40 then find the value of EFd.

Aneli [31]

Using the given information, the value of Σfd is 800

<h3>Calculating mean using Assumed mean </h3>

From the question, we are to determine the value of Σfd

The formula for mean, using the assumed mean method is given by

$\bar x = A + \frac{\sum fd}{\sum f}$

Where $\bar x$ is the mean

A is the assumed mean

From the given information,

$\bar x = 80$

$A = 60$

$\sum f = 40$

Putting the parameters into the equation, we get

$80 = 60 + \frac{\sum fd}{40}$

$80-60 = \frac{\sum fd}{40}$

$20 = \frac{\sum fd}{40}$

$\sum fd = 20 \times 40$

$\sum fd = 800$

Hence, the value of Σfd is 800

Learn more on Mean here: brainly.com/question/20118982

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8 0

2 years ago

Please help!! Will give brainliest if correct!

zubka84 [21]

Answer:

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

A government agency has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher intercepted

mylen [45]

let n be the number of times letter be found (1800), p be the success rate (0.068), and q be the failure rate (1 - 0.068 = 0.932)

mean = np = 1800 x 0.068 = 122.4

standard deviation = √(npq) = √(1800 x 0.068 x 0.932) = 10.6807414

4 0

3 years ago

What is the solution to sqrt 17-x=x+3? Show your work.

snow_lady [41]

Answer:

$x=1$

Step-by-step explanation:

Remember:

$(\sqrt[n]{a})^n=a\\\\(a+b)=a^2+2ab+b^2$

Given the equation $\sqrt{17-x}=x+3$ , you need to solve for the variable "x" to find its value.

You need to square both sides of the equation:

$(\sqrt{17-x})^2=(x+3)^2$

$17-x=(x+3)^2$

Simplifying, you get:

$17-x=x^2+2(x)(3)+3^2\\\\17-x=x^2+6x+9\\\\x^2+6x+9+x-17=0\\\\x^2+7x-8=0$

Factor the quadratic equation. Find two numbers whose sum be 7 and whose product be -8. These are: -1 and 8:

$(x-1)(x+8)=0$

Then:

$x_1=1\\x_2=-8$

Let's check if the first solution is correct:

$\sqrt{17-(1)}=(1)+3$

$4=4$ (It checks)

Let's check if the second solution is correct:

$\sqrt{17-(-8)}=(-8)+3$

$5\neq-5$ (It does not checks)

Therefore, the solution is:

$x=1$

3 0

3 years ago