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3 years ago

2−b/3=−5/2 what is b? Note: the / is a fraction separation

Mathematics

2 answers:

natulia [17]3 years ago

8 0

Is the 2 part of the first fraction?

Rudik [331]3 years ago

7 0

Answer:

I think that the answer is

b = 7

Here is the step-by-step solution.....

See the attached files for the step-by-step solution...><><

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Graph a line with a slope of 4 that contains the point (3,0).

Korvikt [17]

Answer:

just graph the line: y=4x-12

Step-by-step explanation:

4 0

3 years ago

Solve y=x^2-5 for x

Natasha_Volkova [10]

Answer:

x^2 - 5 = y

x^2= y + 5

$x \: = \: \sqrt{y + 5}$

7 0

3 years ago

A marketing firm is considering making up to three new hires. Given its specific needs, the management feels that there is a 50%

IRISSAK [1]

Answer:

a) 0.9

b) Mean = 1.58

Standard Deviation = 0.89

Step-by-step explanation:

We are given the following in the question:

A marketing firm is considering making up to three new hires.

Let X be the variable describing the number of hiring in the company.

Thus, x can take values 0,1 ,2 and 3.

$P(x\geq 2) = 50\%= 0.5\\P(x = 0) = 10\% = 0.1\\P(x = 3) = 18\% = 0.18$

a) P(firm will make at least one hire)

$P(x\geq 2) = P(x=2) + P(x=3)\\0.5 = P(x=2) + 0.18\\ P(x=2) = 0.32$

Also,

$P(x= 0) +P(x= 1) + P(x= 2) + P(x= 3) = 1\\ 0.1 + P(x= 1) + 0.32 + 0.18 = 1\\ P(x= 1) = 1- (0.1+0.32+0.18) = 0.4$

$\text{P(firm will make at least one hire)}\\= P(x\geq 1)\\=P(x=1) + P(x=2) + P(x=3)\\ = 0.4 + 0.32 + 0.18 = 0.9$

b) expected value and the standard deviation of the number of hires.

$E(X) = \displaystyle\sum x_iP(x_i)\\=0(0.1) + 1(0.4) + 2(0.32)+3(0.18) = 1.58$

$E(x^2) = \displaystyle\sum x_i^2P(x_i)\\=0(0.1) + 1(0.4) + 4(0.32) +9(0.18) = 3.3\\V(x) = E(x^2)-[E(x)]^2 = 3.3-(1.58)^2 = 0.80\\\text{Standard Deviation} = \sqrt{V(x)} = \sqrt{0.8036} = 0.89$

7 0

3 years ago

PLEASE HELP! My friend and i cant figure out the answer!!! i attached a picture of the question please help us!!!

satela [25.4K]

Answer:

a.6.66

b.384

c.860

d.166

Step-by-step explanation:

6 0

4 years ago

Two brothers are saving money to buy tickets to a concert. their combined saving is $55 one brother has $15 more than the other.

Vladimir [108]

Brother one: x

Brother two: x + 15

---

Make them add up to 55 in an equation.

x + (x + 15) = 55

Combine like terms.

2x + 15 = 55

Subtract 15 from both sides.

2x = 40

Divide both sides by 2.

x = 20

Plug 20 for x into brother two.

(20) + 15 = 35

Brother one has saved $20, brother two has saved $35.

6 0

3 years ago