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HACTEHA [7]
3 years ago
11

What percent is equivalent to 45? 20% 40% 60% 80%

Mathematics
2 answers:
Aneli [31]3 years ago
6 0
The answer will be 20%
Rzqust [24]3 years ago
5 0

Answer:

20%

Step-by-step explanation:

i divided the percentages each by 45 and so% was 4.4. 20% was the closest to 45.

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Someone please explain this question PART "b) i" ONLY!!!
Gnom [1K]
<h3>Answer:   (n-1)^2</h3>

This is because we have a list of perfect squares 0,1,4,9,...

We use n-1 in place of n because we're shifting things one spot to the left, since we start at 0 instead of 1.

In other words, if the answer was n^2, then the first term would be 1^2 = 1, the second term would be 2^2 = 4, and so on. But again, we started with 0^2 = 0, so that's why we need the n-1 shift.

You can confirm this is the case by plugging n = 1 into (n-1)^2 and you should find the result is 0^2 = 0. Similarly, if you tried n = 2, you should get 1^2 = 1, and so on. It appears you already wrote the answer when you wrote "Mark Scheme".

All of this only applies to sequence A.

side note: n is some positive whole number.

8 0
3 years ago
~~~~~~~~~~~`````````````````
bixtya [17]

Answer:

Step-by-step explanation:

(-3/4)x + 9 = (-1/2)x + 8

        9 - 8 =  (-1/2)x + (3/4)x

               1 =  (1/4)x

              x = 4

y = (-3/4)4 + 9

y = -3 + 9

y = 6

3 0
2 years ago
Y varies directly as x. Y=28 when x=2. Find y when x=12
Tatiana [17]

Answer:

Y=168

Step-by-step explanation:

Y varies directly as X

Y=kx

K is a constant

28=k2

K=28/2 =14

Y=14x

Y=14×12

Y=168

4 0
2 years ago
What is the difference between brackets and parentheses in math?
DaniilM [7]
There’s really not one !
3 0
2 years ago
A manager must select three coders from her group to write three different software projects. There are 7 junior and 3 senior co
gavmur [86]

Answer:

The total number of ways are 168.

Step-by-step explanation:

Consider the provided information.

There are 7 junior and 3 senior coders in her group.

The first project can be written by any of the coders. The second project must be written by a senior person and the third project must be written by a junior person.

For second project we have 3 choices and for third project we have 7 choices.

Now there are 2 possible case:

Case I: If first and second coder is senior, then the total number of ways are:

3\times 2\times 7=42

Case II: If first and third coder is junior, then the total number of ways are:

7\times 3\times 6=126

Hence, the total number of ways are: 42+126=168

6 0
3 years ago
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