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vovikov84 [41]
3 years ago
14

Solve 7x − 2(x + 1) = 6x + 14. (5 points) −12 12 −16 16

Mathematics
1 answer:
anygoal [31]3 years ago
5 0

Answer:

C

X=-16

Step-by-step explanation:

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Determine the number of subsets of 3,4,5,6,7,8,9,10,11,12,13,14,15
lbvjy [14]

Answer:

  8192

Step-by-step explanation:

The number of subsets of an n-element set is 2^n.

Your set has 13 elements, so has 2^13 = 8192 subsets.

__

This count includes the empty set and the full set.

3 0
3 years ago
The function f(x) = –x2 + 20x – 75 models the profit from one customer, in dollars, a shop makes for printing photos, where x is
trasher [3.6K]
The function is graphed as shown below

Part A:

We use the formula - \frac{b}{2a} to find the vertex of the function. A quadratic function of the form of a x^{2} +bx+c and equating this form to the given function - x^{2} +20x-75, we have
b=20 and a=-1.

Substituting a and b into the vertex formula, we have
x=- \frac{20}{2(-1)}=10, as shown in the graph

This calculation means that the highest profit is achieved when the number of photo printed equals to ten photos

Part B:

We can find solution to this equation by factorising

- x^{2} +20x-75=0
-( x^{2} -20x+75)=0
x^{2} -20x+75=0
(x-5)(x-15)=0
x=5 and x=15, as shown in the graph

The two values means that the company makes no profit when they either produce 5 or 15 photos

8 0
3 years ago
The $200 digital camera Andres purchased was on sale for 15% off. How much was the discount amount?
Fed [463]

Answer:

30

Step-by-step explanation:

200*0.15=30

8 0
3 years ago
Read 2 more answers
Please help I'm so close to being done and I don't know how to do this!!! Pls give answer but show how to do it!!!
cestrela7 [59]

Answer:

  • 8y + 16

Step-by-step explanation:

The shaded area is the difference of the large and small squares.

<u>Area of large square:</u>

  • A(l) =  (y + 4)²

<u>Area of small square:</u>

  • A(s) = y²

<u>Shaded area:</u>

  • A = A(l) - A(s)
  • A = (y + 4)² - y² = y² + 8y + 16 - y² = 8y + 16

4 0
2 years ago
A school goes through 10 gallons of milk in 3 days.
Akimi4 [234]
G = gallons     d = days
10g = 3d
?g = 1d
1g = ?d
-------------
for gallons in a day, divide 10g = 3d by 3
d = 10/3 gallons
3 and 1/3 gallons in a day
---------------
for days per gallon, divide 10g = 3d by 10
g = 3/10 days
1 gallon lasts 3/10 of a day
3 0
3 years ago
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