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3 years ago

WILL BE MARKED AS BRAINLIEST !!! Solve (−22 −4 + 8)+ (52 + 2 − 25)

Mathematics

2 answers:

nataly862011 [7]3 years ago

6 0

Answer:

Step-by-step explanation:

anygoal [31]3 years ago

3 0

Answer:

Step-by-step explanation:

1) lets get rid of the parentheses, we dont really need them:

−22 −4 + 8+ 52 + 2 − 25

Following order of operations we need to work from left to right

-22-4=-26

-26+8=-18

-18+52=34

34+2=36

36-25=11

the answer is 11

hope this helps

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Residuals

PolarNik [594]

Answer:

1. predicted attendance: 141.35

2. residual: 18.65

Step-by-step explanation:

1. Predicted attendance is ...

y = -5.9·5 +170.85 = 141.35

2. As the problem statement tells you, ...

actual value - predicted value = residual

160 - 141.35 = 18.65 . . . the residual

6 0

3 years ago

Suppose we want to choose 5 objects, without replacement, from 13 distinct objects. (a) How many ways can this be done, if the o

Arisa [49]

Answer:

A. 1, 287 ways

B. 154,440 ways

Step-by-step explanation:

A. We want to choose 5 objects from a total 13, without considering the order in which they are chosen.

The correct way to do this is by using the combination formula since order is not considered;

Thus we have ; 13 C 5 read as 13 combination 5;

Mathematically, n C r is ; n!/(n-r)!r!

Thus, we have ;

13!/(13-8)!8! = 13!/5!8! = 1,287 ways

B. By considering order, we shall be using the permutation formula;

Mathematically n P r = n!/(n-r)!

Read as n permutation r;

Using the numbers involved, we have ; 13 P 5

= 13!/(13-5)! = 13!/8! = 154,440 ways

8 0

3 years ago

Select the correct answer. Find the solution(s) for x in the equation below.<br> x2-9x+20=0

trasher [3.6K]

Step-by-step explanation:

Given

x² - 9x + 20 = 0

x² - ( 4 + 5) x + 20 = 0

x² - 4x - 5x + 20 = 0

x ( x - 4 ) - 5 (x - 4 ) = 0

(x - 4 ) ( x - 5 ) = 0

Either

x - 4 =0

x = 4

x - 5 =0

x = 5

x = 4 and 5

Hope it will help :)

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8 0

3 years ago

Read 2 more answers

What is the solution for this system of linear equations?<br> {23x+4=y<br> 4−2x=y

liubo4ka [24]

We can subsitute since
23x+4=y and
4-2x=y
therefor
23x+4=y=4-2x
so
23x+4=4-2x
minus 4 on both sides
23x=-2x
add 2x to both sides
25x=0
divide both sides by... uh oh
I guess x=0

sub
4-2(0)=y
4-0=y
4=y

the solution is (0,4)

3 0

4 years ago

Find the interquartile range for a data set having the five-number summary: 3.4, 10.8, 16.7, 23.1, 31.5

natita [175]

.Answer:

D. 12.3

Step-by-step explanation:

Arrange the data in increasing order

3.4, 10.8, 16.7, 23.1, 31.5

⇒This is an odd set of numbers, to find the interquartile range you include the median in both quartiles.

Locate the median/center value

3.4, 10.8, 16.7, 23.1, 31.5

Find lower half and find the median

lower half values⇒3.4, 10.8, 16.7

Median=Q1=10.8

Find the upper half and find

upper half= 16.7,23.1, 31.5

median= 16.7,23.1,31.5

Q3=23.1

Interquartile range=Q3-Q1

23.1-10.8=12.3

5 0

3 years ago