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3 years ago

What is the sum of (5x2 + x - 3) and (-4x2 - x +9) ?

Mathematics

1 answer:

matrenka [14]3 years ago

6 0

Answer:

$x^{2} + 6$

Step-by-step explanation:

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Help pls urgent!!!!!!!!!!

Nesterboy [21]

Answer:

Step-by-step explanation:

8 0

3 years ago

A large school district is reevaluating its teachers' salaries. They have decided to use regression analysis to predict mean tea

inna [77]

Answer:

a) Y = 35,422.12

b) Y = 29,367.67

c) 1,210.89

Step-by-step explanation:

The salary of teachers is forecasted by the following equation,

Y = 23,313.22 + 1,210.89X

Where Y is the forecasted salary and X is the years of experience.

(a) If a teacher has 10 years of experience, what is the forecasted salary?

Here we have X = 10

Y = 23,313.22 + 1,210.89(10)

Y = 23,313.22 + 12,108.9

Y = 35,422.12

(b) If a teacher has 5 years of experience, what is the forecasted salary?

Here we have X = 5

Y = 23,313.22 + 1,210.89(5)

Y = 23,313.22 + 6,054.45

Y = 29,367.67

(c) Based on this equation, for every additional year of service, a teacher could expect his or her salary to increase by how much?

For every additional year of service, a teacher could expect an increase of 1,210.89.

7 0

3 years ago

BRAINLIEST!!!!!!!

maxonik [38]

Which ordered pairs are solutions for this function?

Question 2 options:

{(0, -4), (1, -2), (5, 6), (6, 5)}

8 0

3 years ago

The 18 faculty members in a college math department range in age from 32 to 68. A stem plot follows: The first and third quartil

valentina_108 [34]

Answer:

$Q_{1}=39, \:and\: Q_{3}=58$

Step-by-step explanation:

1) This Stem and Leaf plot works like a Histogram. Completing the question, check below the Stem plot. Look the data out of the Stem plot and within (in the graph below)

32, 34 , 38 , 39 , 39 , 40 , 43 , 45 , 46 , 49 , 53 , 54 , 57 , 58 , 59 , 59 , 63 , 68

2) Notice how the first digit is on the Stem column (check below)

3) To find the first and Third Quartiles

Let's use the formulas to find the position, then the value. As it follows:

$Q_3=\frac{3}{4}(n+1) \Rightarrow Q_3=\frac{3}{4}(18+1) Q_3=14.25 \approx14th =58$

$Q_1=\frac{(n+1)}{4} \Rightarrow Q_1=4.75 th \approx Q_1 =5th =39$

4 0

3 years ago

The length of a rectangle is 3yd longer than its width. If the perimeter of the rectangle is 50yd, find it’s length and width

bazaltina [42]

Answer:

3(15)

Step-by-step explanation:

3 0

3 years ago