All categories

3 years ago

---> help pls!<--- What is -64.2 divided by 2?

Mathematics

2 answers:

Bingel [31]3 years ago

5 0

The answer is -32.1! Hope this helps, love!

KatRina [158]3 years ago

3 0

Answer:

-32.1

Step By Step Explanation:

You might be interested in

2(x1/2 -7)=-6 solve for x

Andru [333]

First divide by 2, then you have
1/2x-7=-3
Then add 7 to both sides
1/2x=4
Then then divide by 1/2(which is the same as multiplying by 2)
And
x=8

3 0

3 years ago

According to a flight statistics website, in 2009, a certain airline had the highest percentage of on-time flights in the air

sp2606 [1]

Answer:

a) 0.0139; b) 0.1809; c) 0.4278

Step-by-step explanation:

We use a normal approximation to a binomial distribution for these problems.

The sample size, n, for each is 30; p, the probability of success, is 0.808. This makes the mean, μ = np = 30(0.808) = 24.24. The standard deviation,

σ = √(npq) = √(30(0.808)(1-0.808)) = √(30(0.808)(0.192)) = √4.65408 = 2.1573

For part a,

We are asked for P(X < 20). Using continuity correction to account for the discrete variable, we find

P(X < 19.5)

z = (19.5-24.24)/(2.1573) = -4.74/2.1573 = -2.20

Using a z table, we see that the area under the curve to the left of this is 0.0139.

For part b,

We are asked for P(X = 24). Using continuity correction, we find

P(23.5 < X < 24.5)

z = (23.5-24.24)/2.1573 = -0.74/2.1573 = -0.34

z = (24.5-24.24)/2.1573 = 0.26/2.1573 = 0.12

Using a z table, we see that the area under the curve to the left of z = -0.34 is 0.3669. The area under the curve to the left of z = 0.12 is 0.5478. The area between them is then

0.5478-0.3669 = 0.1809.

For part c,

We are asked to find P(25 ≤ X ≤ 28). Using continuity correction, we find

P(24.5 < X < 28.5)

z = (24.5-24.24)/2.1573 = 0.26/2.1573 = 0.12

z = (28.5-24.24)/2.1573 = 4.26/2.1573 = 1.97

Using a z table, we see that the area under the curve to the left of z = 0.12 is 0.5478. The area under the curve to the left of z = 1.97 is 0.9756. The area between them is 0.9756 - 0.5478 = 0.4278.

4 0

4 years ago

Jenna has a rectangular pig pen that measures 8m wide by 10m long. She wants to increase the area to 168 m^2 by increasing the l

babunello [35]

Answer:

The answer is A

Step-by-step explanation:

I just took the test and it was the answer!

4 0

3 years ago

Pls helpppppppppl!!!!

Troyanec [42]

Answer:

I dont really understand it but I think it's the first one cuz that's the only one that makes sense to me hope it helped tho:))))))))

8 0

3 years ago

Read 2 more answers

The following set of points belong to a specific function: {(-3,15)(-2,17), (-1,11), (0,3),(1,-1), (2,5),(3,27)} Based on the se

adelina 88 [10]

Answer:

(a)Degree 3

(b) $f(x)=x^3+2x^2-7x+3 .$

Step-by-step explanation:

The function represented by the set of points: {(-3,15)(-2,17), (-1,11), (0,3),(1,-1), (2,5),(3,27)} has 2 turning points when plotted on a graph.

(a)Now, we know that the maximum number of turning points of a polynomial function is always one less than the degree of the function.

Therefore, the polynomial has a degree of 3

(b)A cubic function is one in the form $f(x)=ax^3+bx^2+cx+d .$ where d is the y-intercept.

From the set of values, the y-intercept, d=3

Therefore, our polynomial is of the form:

$f(x)=ax^3+bx^2+cx+3 .$

$\text{At } (-3,15), 15=a(-3)^3+b(-3)^2+c(-3)+3 \implies -27a+9b-3c=12\\\text{At } (-2,17), 17=a(-2)^3+b(-2)^2+c(-2)+3 \implies -8a+4b-2c=14\\\text{At } (-1,11), 11=a(-1)^3+b(-1)^2+c(-1)+3 \implies -a+b-c=8$

Solving the three resulting equations simultaneously use a calculator), we obtain:

$a=1, b=2, c=-7$

Therefore, an equation of this function is:

$f(x)=x^3+2x^2-7x+3 .$

7 0

3 years ago