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Vikentia [17]
3 years ago
14

Decrease 50 by 60% please

Mathematics
1 answer:
jeyben [28]3 years ago
7 0

Answer:

20

Step-by-step explanation:

60% of a hundred is 60, and since 50 is half of that I just halfed sixty too, so decrease 50 by 30

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Can someone please show me the steps in finding the answers to these two problems ?
ratelena [41]

Answer:

  • y = 8^(x-1)
  • x = 24

Step-by-step explanation:

The first step is always to look at the question to see what you are given and what you are asked for. The next step is to identify the relevant relations between what you have and what you need to find.

__

1) You are given a sequence of (x, y) points where x increases by 1 from one point to the next, and y increases by a factor of 8. This tells you the value of y form a geometric sequence that is described by an exponential function.

The general form of the n-th term of a geometric sequence is ...

  an = a1·r^(n-1)

where a1 is the value for n=1, and r is the common ratio.

If this were a geometric sequence, we could write the general term using a1=1 and r=8:

  an = 1·8^(n-1)

Instead, this is a relation between x and y. It is the same relation as for the geometric sequence, but with different variable names. We have y instead of an, and we have x instead of n. So, the equation is ...

  y = 8^(x -1) . . . . . . . or . . y = (1/8)8^x

__

2) This equation is of the form ...

  k·∛x = 6

Since k is also a cube root, it is easiest to cube both sides of the equation:

  9x = 6³ = 216

Now, you can divide by 9 to find x:

  x = 216/9

  x = 24

5 0
3 years ago
Read 2 more answers
Find the value of y so<br> that (-2,y) satisfies y =-7x?
Anit [1.1K]

Answer:

y=14

Step-by-step explanation:

plug in -2 in the place of x

y=-7(-2)    y=14

6 0
3 years ago
suppose 5 men and 7 women are on a crowded elevator. at the next floor, four people get off the elevator. find the probability t
lubasha [3.4K]
The total number of arrangements for all of them to be women is:
C(7, 4) because the order does not matter; we'd still have the same arrangements.

Now, we can simplify this:
C(7, 4) = \frac{7!}{4!(7 - 4)!}
= \frac{5040}{4!3!}
= \frac{5040}{24 \cdot 6}
= \frac{5040}{144} = 35

Now, the total number of arrangements, without restriction, is simply: C(12, 4) because we don't care who we pick.

\text{P(4 women): } \frac{35}{495} = \frac{7}{99}
3 0
3 years ago
You swung the bat 15 times in a baseball game. Of those swings, 4 were strikes, 5 were foul balls, and the rest were hits. How m
faust18 [17]

Answer:

6

Step-by-step explanation:

15-5-4= 6

5 0
3 years ago
How much time has passed 4:33-8:12
kirill115 [55]

Answer:

3 hours 39 minutes

Step-by-step explanation:

4:33 + 0:39 = 5:12

5:12 + 3:00 = 8:12

3 0
3 years ago
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