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Sergeu [11.5K]
3 years ago
7

Can anyone help me with my problems for 25 points please

Mathematics
2 answers:
madam [21]3 years ago
4 0
18.) 13.796

19.) 39.99

21.) 14.82

22.) 2.23

The decimal doesn't matter for subtraction and addition. It just goes down with the answers. 
amid [387]3 years ago
4 0
Question 18- 13.796 Question 19- 39.99 Question 21- 14.82 Question 22- 2.23

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Is the mean greater than, less than, or equal to the median? Explain your reasoning.
Alekssandra [29.7K]
Equal because 30 is the median and when you find the mean, it is also 30. Please give brainliest!
7 0
3 years ago
8x-5y=21 simultaneous linear equation<br>2x+9y=-5
olya-2409 [2.1K]

Answer:

x=2 and y=-1

Step-by-step explanation:

If two equations are given, we can solve one of the equation in terms of single variable and put it in the other equation which will further give the value of x and y.

For the given equations:

8x-5y=21              Equation:1

2x+9y=-5             Equation:2

Solving equation multiply equation 2 with 4 on both the sides

8x+36y=-20        Equation 3

Subtracting Equation:3 from Equation:1

8x-5y-(8x+36y)=21-(-20)\\8x-5y-8x-36y=21+20\\-41y=41\\y=-1

Putting value of 'y' in Equation:2 which will give the value of x

2x+9y=-5\\2x+9(-1)=-5\\2x-9=-5\\2x=4\\x=2

8 0
3 years ago
You may use a spreadsheet for this one. If $60 is put in an account that gets 7% per year, and I add $15 at the end of each year
Nutka1998 [239]
You will have approximately $257 at the end of 8 years.
3 0
3 years ago
What is the remainder when x3 - 1 is divided<br> by (x + 2)?
Viktor [21]

Given:

The polynomial x^3-1 is divided by (x+2).

To find:

The remainder.

Solution:

Remainder theorem: If a polynomial p(x) is divided by (x-c), then the remainder is p(c).

Consider the polynomial:

p(x)=x^3-1

It is divided by (x+2). So, by the remainder theorem the remainder is p(-2).

Substituting x=-2 in the above polynomial, we get

p(-2)=(-2)^3-1

p(-2)=-8-1

p(-2)=-9

Therefore, the remainder is -9.

4 0
3 years ago
X-12=1-2x+5 what does x equal
notka56 [123]

X= - x/2+9 if that is what you are asking

or -2x+18

8 0
3 years ago
Read 2 more answers
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