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Vikentia [17]
3 years ago
7

What is 2(-9x-4y-7) simplified

Mathematics
1 answer:
Setler79 [48]3 years ago
4 0
-18x-8y-14 because you need to distribute the digits
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Find the expression that is equivalent to the original exponential expression depicted below. Thank you!
svet-max [94.6K]

Answer:

A

Step-by-step explanation:

you multiply the numbers and add the variables

5 0
2 years ago
Read 2 more answers
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
A cylindrical water tank has a diameter of 9 feet and a height of 16 feet. Each can of paint covers 50 square feet. What is the
iVinArrow [24]

Answer:

12 cans

Step-by-step explanation:

The area of the outside of the tank:

radio = half diameter = 4.5 ft.

base: A_{b} =\pi r^{2} =\pi (4.5)^{2} =20.25\pi

Top: = base =20.25\pi

cylinder: 2\pi rh=2\pi (4.5)(16)=144\pi

Total area to paint: 144\pi +2(20.25\pi) =184.5\pi =579.6sq.ft.

Number of cans of paint:

c=\frac{579.6}{50} =11.59=12

Hope this helps

7 0
2 years ago
Jason walked for 0.75 hours at a rate of 3.4 miles per hour. He determines that he walked 0.255 miles. Which best explains Jason
Rzqust [24]

Answer:

B

Step-by-step explanation:

I did Edginuity

3 0
3 years ago
Read 2 more answers
Here’s my dilemma, I can accept a $1000 bill or play a game ten times. For each roll of the single die, I win $500 for rolling 1
Aloiza [94]

Answer:

you should accept the $1,000 bill

Step-by-step explanation:

Given the information:

  • $500 for rolling 1 or 2
  • $400 for rolling 3
  • lose $300 for rolling 4,5,6

P (rolling 1 or 2) = 1/6 + 1/6 = 2/6 = 1/3

P (rolling a 3) = 1/6

P (rolling 4 or 5 or 6) = 3/6 = 1/2

Hence, the expected value for 1 time is:

E = (1/3)*500 + (1/6)*400 - (1/2)*300

E = $166 + $66 - $150

E = $82

Expected value is linear so if you roll the die 10 times, expected value is: 10*82 = $820

The expected value is $82, meaning you should accept the $1,000 bill

5 0
3 years ago
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