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viktelen [127]
3 years ago
5

(-3x2 + 4x + 2) + (7x - 5)

Mathematics
1 answer:
aliina [53]3 years ago
5 0

Answer:

-3x^2 + 11x -3

Step-by-step explanation:

1st. Rewrite.

2nd. Remove the parentheses.

3rd. Collect like terms.

4th. Calculate.

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A rectangular box with an open top has a length of x feet, a width of y feet, and a height of z feet. It costs $4.20 per square
daser333 [38]

Answer:

C(x,y,z) = 4.2xy + 1.5xz + 1.5yz

Step-by-step explanation:

We are given the following information in the question:

A rectangular box has a length of x feet, a width of y feet, and a height of z feet.

Area of base =

\text{Length}\times \text{Base}\\=x\times y

Cost of building base = $4.20 per square foot

Total cost of building base =

\text{Area of base}\times 4.20\\= 4.2xy

Area of 4 walls =

2(\text{Length}\times \text{Height} + \text{Base}\times \text{Height}) \\=2(xz+yz)

Cost of building base = $0.75 per square foot

Total cost of building 4 walls =

\text{Area of 4 walls}\times 0.75\\= 1.5(xz+yz)

Total cost of building box =

C(x,y,z) = 4.2xy + 1.5(xz+yz)\\C(x,y,z) = 4.2xy + 1.5xz + 1.5yz

7 0
3 years ago
The roots of x^2-6x-16=0 <br> {-16,6}
LenaWriter [7]

Answer:

-2 and 8 is the answer.

6 0
3 years ago
Mrs riddle has $543.73 in her bank account? She writes a check for $840.00. By how much has she overdrawn her account?
Alexxandr [17]

Answer: im only in middle school so this might be wrong but...

-296.27

Step-by-step explanation:

because

3 0
3 years ago
ANALYZE A PROBLEM Describe the x-values for which (a) f is increasing (b) f is decreasing, (c) f (x) &gt; 0 and (d) f (x) &lt; 0
Karolina [17]

The analysis of the graph, that has x-intercepts of (0, 2), and (0, 5), we get;

a. The function increases when x > 4

b. The function decreases when x < 4

c. The function is greater than zero when x < 3, and x > 5

d. The function is less than zero when 3 < x < 5

<h3>What is a point where a function is increasing?</h3>

The location of a point where a function is increasing is where the slope of the function is larger than zero.

The description of the graph of the function are as follows;

The shape of the function  = Concave upwards

The coordinates of the vertex of the function = (4, -5)

The region where the function is decreasing is from -∞ to 4

The region where the function is decreasing is therefore; x < 4

At the vertex, (4, -5), the slope of the function is zero, therefore;

Therefore, the function is increasing where x > 4

The x-intercepts are at point (0, 3) and (0, 5)

Therefore, the function is greater than zero when x < 3, and when x > 5

The function is less than zero in the range 3 < x < 5

Learn more about the graph of functions here:

brainly.com/question/16924356

#SPJ1

7 0
2 years ago
The musical “Rent” boasts there are 525,600 minutes in a year. Verify that this is correct for a 365-day (non-leap year) year.
galben [10]

Answer:

Verified

Step-by-step explanation:

minutes to hours:

525600/60

8760

hours to days:

8760/24

365

so there are 525600 minutes in 365 days. Confirmed

4 0
3 years ago
Read 2 more answers
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