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2 years ago

What is the answer to -1/2 ÷ (-1 3/8)Correct answers get brainliest

Mathematics

1 answer:

Ymorist [56]2 years ago

6 0

Answer:

-4/11

Step-by-step explanation:

The easiest way to find the answer to this is by a calculator.

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What is the graph of the equation 9x^2 + 4y^2 - 18x + 8y - 23 = 0 ?<br> Also, how did you get that?

Dmitriy789 [7]

13xy^2-10xy-23=0

you first add the like terms and rewrite and thats how you get the answer

8 0

2 years ago

Five males with an X-linked genetic disorder have one child each. The random variable x is the number of children among the fiv

Dahasolnce [82]

Answer and Explanation:

Given : Five males with an X-linked genetic disorder have one child each. The random variable x is the number of children among the five who inherit the X-linked genetic disorder.

To find :

a. Does the table show a probability distribution?

b. Find the mean and standard deviation of the random variable x.

Solution :

a) To determine that table shows a probability distribution we add up all six probabilities if the sum is 1 then it is a valid distribution.

$\sum P(X)=0.029+0.147+0.324+0.324+0.147+0.029$

$\sum P(X)=1$

Yes it is a probability distribution.

b) First we create the table as per requirements,

x P(x) xP(x) x² x²P(x)

0 0.029 0 0 0

1 0.147 0.147 1 0.147

2 0.324 0.648 4 1.296

3 0.324 0.972 9 2.916

4 0.147 0.588 16 2.352

5 0.029 0.145 25 0.725

∑P(x)=1 ∑xP(x)=2.5 ∑x²P(x)=7.436

The mean of the random variable is

$\mu=\sum xP(x)=2.5$

The standard deviation of the random sample is

$Variance=\sigma^2$

$\sigma^2=\sum x^2P(x)-\mu^2$

$\sigma^2=7.436-(2.5)^2$

$\sigma^2=7.436-6.25$

$\sigma^2=1.186$

$\sigma=\sqrt{1.186}$

$\sigma=1.08$

Therefore, The mean is 2.5 and the standard deviation is 1.08.

5 0

2 years ago

HELP NEEDED ASAP.....NO LINKS AND NO TROLLING

sveticcg [70]

Answer: I won't bother explaining cause you only want the answer

Step-by-step explanation:

page 1
Shift: a type of translation that moves the graph without changing its scale or shape or direction.

moving, location or points, rising, running (the last two are subjective I think there are better answers)

page 2 (right to left in rows)

y, adds

y, subtracts

x, adds

x, subtracts

Page 3

up 3, down 3, left 3, right 3

page 4

y = (x-2)^2 - 1

y = (x+1)^2 +3

8 0

1 year ago

Question 9 of 10

Kay [80]

Answer: A. (2, 5), (3, 6), (6,9)

Step-by-step explanation:

Each value of x maps onto only one value of y.

7 0

1 year ago

What is the missing value in x2y8 · x3y? = x5y5?

sweet-ann [11.9K]

Answer:

-3

Step-by-step explanation:

To find:

The value of '?' in the following expression:

$x^2y^8.x^3y^? = x^5y^5$

Solution:

First of all, let us have a look at a few rules of the exponents:

$1.\ a^b.a^c=a^{b+c}$

$2.\ a^b.a^{-c}=a^{b-c}$

Let us apply these rules and try to find out the missing value ('?') in the given expression.

Left Hand Side (LHS):

$x^2y^8.x^3y^?\\\Rightarrow x^2.x^3.y^8.y^?\\\Rightarrow x^{2+3}y^{8+?}\\\Rightarrow x^{5}y^{8+?}$

Now, let us compare the LHS with RHS, we get:

$x^{5}y^{8+?} = x^{5}y^{5}$

Dividing with $x^5$ on both sides:

$y^{8+?} = y^5\\\Rightarrow 8+? = 5\\\Rightarrow ? = 5-8 \\\Rightarrow ? =-3$

Therefore, the missing value in the expression is <em>-3.</em>

4 0

2 years ago