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Alex
3 years ago
11

У

Mathematics
1 answer:
Whitepunk [10]3 years ago
3 0

Answer:

go on tigermath

Step-by-step explanation:

You might be interested in
A father is 32 years older than his son. In four years,
sergiy2304 [10]

Answer:

  • father: 36
  • son: 4

Step-by-step explanation:

Let s represent the son's age now. Then s+32 is the father's age. In 4 years, we have ...

  5(s+4) = (s+32)+4

  5s +20 = s +36 . . . . . eliminate parentheses

  4s = 16 . . . . . . . . . . . . subtract s+20

  s = 4

The son is now 4 years old; the father, 36.

_____

<em>Alternate solution</em>

In 4 years, the ratio of ages is ...

  father : son = 5 : 1

The difference of their ages at that time is 5-1 = 4 "ratio units". Since the difference in ages is 32 years, each ratio unit must stand for 32/4 = 8 years. That is, the future age ratio is ...

  father : son = 40 : 8

So, now (4 years earlier), the ages must be ...

  father: 36; son: 4.

5 0
3 years ago
Please help me with my math im tired<br> (ill give u brainliest)
klasskru [66]

Answer:

below given

Step-by-step explanation:

1) yes

2)no

3)no

4)yes

5)no

7 0
2 years ago
Read 2 more answers
Trapezoid ABCD below is to be translated to
Anarel [89]

Answer:

17x+13y

Step-by-step explanation:

6 0
3 years ago
I need help with Math please (20 points)
Afina-wow [57]

Answer:

603

Step-by-step explanation:

The rate of change is found by

rate of change = f(b) -f(a)

                           ------------

                            b-a

We need to find the rate of change for the interval 7,9  and 4,6

We know b= 9 and a = 7

f(9) -f(7)

------------

9-7

3878-1852

----------------

9-7

2026

-------

2

1013


We know b= 6 and a = 4

f(6) -f(4)

------------

6-4

1178-358

---------------

6-4

820

------

2

410

It asks how much greater,  that means subtraction

1013-410

603


8 0
3 years ago
A drunkard executes a “random walk” in the following way: each minute he takes a step north or southm with probability 1/2 each,
valentina_108 [34]
Assume that a step to the north is in the positive direction and a step in the south is in the negative direction.

Then,

E(X_i)=50\left(\frac{1}{2}\right)-50\left(\frac{1}{2}\right)\\ \\=25-25=0

and

\sigma^2(X_i)=E(X_i^2)-E(X_i)^2 \\ \\ =50^2\left(\frac{1}{2}\right)+50^2\left(\frac{1}{2}\right)-0^2=2500\left(\frac{1}{2}\right)+2500\left(\frac{1}{2}\right)-0 \\ \\ =2500 \\ \\ \Rightarrow\sigma(X_i)=50

After 1 hour of independent steps,

E(X)=\sum_{i=1}^{60}E(X_i)=60(0)=0

and

\sigma^2(X)=\sum_{i=1}^{60}\sigma^2(X_i) \\  \\ =60(50)=300 \\  \\ \Rightarrow\sigma(X)=\sqrt{300}=17.32

Therefore, by Central Limit Theorem, the distribution of the random walk is normal with a mean of 0 cm and a standard deviation of 17.32 cm. He is expected to be somewhere around his starting point after 1 hour.
6 0
3 years ago
Read 2 more answers
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