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cupoosta [38]
3 years ago
12

Please help!!!!!!!!!!!

Mathematics
2 answers:
Margaret [11]3 years ago
8 0
I agree with the answer above
liq [111]3 years ago
5 0
It should be this y=1/2x+3
You might be interested in
Select the expression equivalent to (-4x + 4.2y) - (-7x + 3.4y)
Alina [70]

Answer:

3x + 0.8y

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

Distributive Property

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

(-4x + 4.2y) - (-7x + 3.4y)

<u>Step 2: Simplify</u>

  1. [Distributive Property] Distribute negative:                                                    -4x + 4.2y + 7x - 3.4y
  2. Combine like terms (x):                                                                                    3x + 4.2y - 3.4y
  3. Combine like terms (y):                                                                                    3x + 0.8y
4 0
3 years ago
Help please and as soon as possible and thanks
Annette [7]
This is 10.5^2 10.5 is the base and 2 is the exponent. The area is 110.25 square inches.
7 0
3 years ago
If angle of a sector is 115 what is the central angle
Natasha_Volkova [10]
If angle of a sector is 115
the central angle would be 115 also

as the arc measure is equal to the measure of its central angle

3 0
3 years ago
What is the greatest common factor of 4 and 10?
Verdich [7]
The greatest common factor of 4 and 10 is 2
7 0
3 years ago
1.44 Make-up exam: In a class of 28 students, 27 of them took an exam in class and 1 student took a make-up exam the following d
Olenka [21]

Answer:

a) Decrease

b) New mean = 78.43

c) Decrease                        

Step-by-step explanation:

We are given the following in the question:

Total number of students in class = 28

Average of 27 students = 79

Standard Deviation of 27 students = 6.5

New student's score = 63

a) The new student's score will decrease the average.

b) New mean

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean = \dfrac{\displaystyle\sum x_i}{27} = 79\\\\\sum x_i = 27\times 79 = 2133

New mean =

\text{ New mean} =\dfrac{ \displaystyle\sum x_i +63}{28}\\\\ =\dfrac{2133+63}{28}= \dfrac{2196}{28} = 78.43

Thus, the new mean is 78.43

c) Since the new mean decreases, standard deviation for new scores will decrease.

This is because the new value is within the usual values i.e. within two standard deviations of the mean. So, this wont cause a lot of variation as this value will be closer to already available data values. Also number of observations (n) in the denominator is increasing. Based on both these points we can conclude that standard deviation will decrease

Formula for Standard Deviation:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.

7 0
3 years ago
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