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3 years ago

The difference between 5 times a number and 3 is 12

Mathematics

1 answer:

Virty [35]3 years ago

5 0

5x - 3 = 12 <== ur equation

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A continuous random variable X has cdf F(x)=x² b (a) Determine the constants a and b. for a < 0, for 0 < x < 1, for x &

Karolina [17]

Any proper CDF $F(x)$ has the properties

• $\displaystyle \lim_{x\to-\infty} F(x) = 0$

• $\displaystyle \lim_{x\to+\infty} F(x) = 1$

so we have to have a = 0 and b = 1.

This follows from the definitions of PDFs and CDFs. The PDF must satisfy

$\displaystyle \int_{-\infty}^\infty f(x) \, dx = 1$

and so

$\displaystyle \lim_{x\to-\infty} F(x) = \int_{-\infty}^{-\infty} f(t) \, dt = 0 \implies a = 0$

$\displaystyle \lim_{x\to+\infty} F(x) = \int_{-\infty}^\infty f(t) \, dt = 1 \implies b = 1$

8 0

2 years ago

Do the ratios 42/56 and 56/64 form a proportion?<br> if they do explain your answer

Volgvan

Lets check...

42/56 = 56/64
cross multiply
(56)(56) = (42)(64)
3136 = 2688...(incorrect)...these are not proportional

proportions are nothing but equivalent fractions
42/56 = 3/4
56/64 = 7/8
as u can see, they are not equivalent fractions...so they are not proportional

4 0

3 years ago

Combine and write the answer in descending power order (DPO):<br> 3y - y^3 + 2 -3y^2

dexar [7]

Answer:

im sorry

Step-by-step explanation:

ezxerfguibfyrxzwzx

8 0

3 years ago

Someone please help me .

horrorfan [7]

Answer:

c) r = 4x + 2y

Step-by-step explanation:

∑y

-3 + 5 =2

∑x

1 + 3 = 4

r = 4x + 2y

3 0

2 years ago

PLEASE HELP!! WILL MARK BRAINLIEST!!

sladkih [1.3K]

Answer:

if u have any doubts feel free to ask :)

Step-by-step explanation:

Sum of ratio : 9 + 7 + 4 = 20

Adele share :

$\frac{9}{20} \times 680 = 9 \times 34 = \$ 306$

Barbara share :

$\frac{7}{20} \times 680 = 7 \times 34 =\$ 238$

Collette share :

$\frac{4}{20} \times 680 = 4 \times 34 = \$ 136$

$ €

1.125 1

306 x

$\frac{1.125}{306} = \frac{1}{x}$ [cross multiply]

$x =\frac{ 306} {1.125}$

x = €272

Adele receives = €272

Apple Cost

1 kg 2.69

5 kg y

y = 2.69 x 5 = $13.45

Cost of 5kg of apples = $13.45

Cost of 3 kg bananas = 17.56 - 13.45 = $4.11

Banana Cost

3kg 4.11

1 kg z

$z = \frac{4.11}{3}$

z = $1.37

Cost per kilogram of banana = $1.37

e) Collette share = $136

Half of it on clothes = (1/2) x 136 = $68

(1/5) of her share on books = (1/5) x 136 = 27.20

Balance amount with her = 136 - 27.20 - 68 = $ 40.80

7 0

2 years ago