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3 years ago

Anyone know this?????

Mathematics

1 answer:

KatRina [158]3 years ago

3 0

Answer:

I found a calculator that does the work for you it's called calculator soup

Step-by-step explanation:

here's the link https://www.calculatorsoup.com/calculators/statistics/quartile-calculator.php

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The sum of ages Afful and Naomi is 34. In 5 years time , Afful will be 2 times the age on Naomi now. How old are they now.

GenaCL600 [577]

Answer:

Afful is 21 and Naomi is 13.

Step-by-step explanation:

Let $A$ represent the age of Afful and $N$ represent the age of Naomi.

The sum of their ages is 34. In other words:

$A+N=34$

In 5 years time, Afful will be two times the age of Naomi <em>now</em>. In other words:

$A+5=2N$

Solve for the system. Substitute.

$A+N=34\\A=34-N\\34-N+5=2N\\39=3N\\N=13\\\\A=34-N\\A=34-(13)\\A=21$

Afful is currently 21 and Noami is currently 13.

7 0

3 years ago

Read 2 more answers

Si a -5 se le resta -8 Y al total se le agrega 2, ¿Que numero resulta?

raketka [301]

Answer:

- 11

Step-by-step explanation:

- 8 - 5 + 2

- 13 + 2

- 11

3 0

3 years ago

Read 2 more answers

"If a ball is thrown into the air with a velocity of 44 ft/s, its height in feet t seconds later is given by y = 44t − 16t2. (a)

Nataly_w [17]

Answer:

i) -28 ft/s

ii) -21.6 ft/s

iii) -20.8 ft/s

iv) -20.16 ft/s

b) -20 ft/s

Step-by-step explanation:

if v represents vertical velocity then if the height y is

y = 44*t − 16*t²

and the instant velocity v is the derivative with respect to the time

v= dy/dt = 44*(1) - 16*(2*t) = 44- 32*t

while the average velocity is va= (y-y₀)/(t-t₀)

where t₀ = 2 and y₀=y(t₀) = 44*2 − 16*2² = 24

then

va= (y-y₀)/(t-t₀) = (44*t − 16*t² - 24)/(t-2)

for

i) t= 0.5s + 2 s= 2.5 s

va = (44* 2.5 − 16* 2.5 ² - 24)/( 2.5 -2) = -28 ft/s

ii) t= 0.1s + 2 s= 2.1 s

va = (44* 2.1 − 16* 2.1 ² - 24)/( 2.1 -2) = -21.6 ft/s

iii) t= 0.05 s + 2 s= 2.05 s

va = (44* 2.05 − 16* 2.05 ² - 24)/( 2.05 -2) = -20.8 ft/s

iv) t= 0.01s + 2 s= 2.01 s

va = (44* 2.01 − 16* 2.01 ² - 24)/( 2.01 -2) = -20.16 ft/s

b) the instantaneous velocity when t=2

v (t=2) = 44- 32*(2) = -20 ft/s

6 0

3 years ago

a school knows that 38% of its incoming students own a smart phone and a tablet.what percent of students who own a smartphone al

Ede4ka [16]

We know that
38% of the incoming students own both a smartphone and a tablet
84% of the students own a smartphone

We are asked to find the percentage of students who own a smartphone

Let N be the total number of incoming students and S be the total number of students

So,
(N (38%) + S (84%)) / (N + S)

If we know the total number of students or incoming students, we can solve for the percentage by substituting the value of N or S

6 0

3 years ago

Read 2 more answers

What is an equation of the line that passes through the points (-1, 6) and<br> (-1,-5)?

belka [17]

Answer:

x = -1

Step-by-step explanation:

1) First, find the slope of the line by using the slope formula, $m = \frac{y_2-y_1}{x_2-x_1}$ . Substitute the x and y values of the given points into the formula and solve:

$m = \frac{(-5)-(6)}{(-1)-(-1)} \\m = \frac{-5-6}{-1+1}\\m =\frac{-11}{0}$

The result we got was $-\frac{11}{0}$ , but we can't divide by zero. This means that the slope of the line must be undefined instead.

2) All vertical lines have a slope that is undefined. So, this line must be vertical.

All vertical lines are represented by the equation x = a single number. That number represents the x-value of all the points the vertical line intersects. So, take the x-value of the given points (in this case, -1) and put it into that equation. So, the equation of the line must be x = -1.

8 0

3 years ago