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zhuklara [117]
3 years ago
13

.....................

Mathematics
2 answers:
valentina_108 [34]3 years ago
7 0

Answer:

B.The ballpoint pen and the banana

Step-by-step explanation:

impulse purchase means buying uplanned stuff during shopping

since Duke went to buy frozen pizza and toothpaste, ballpoint pen and banana can be refered as impulse purchase

Fynjy0 [20]3 years ago
5 0

The pen and banana were impulse, because he didn't go to the store to buy them.. he added that while he was in the checkout line.

Answer is B.

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Please help. Don’t understand this math problem!
oksian1 [2.3K]

Answer:

  { 4 }

Step-by-step explanation:

First you need to solve the equation. Then you need to write the solutions as a set.

__

I like to use a graphing calculator to solve equations involving roots. That helps avoid extraneous solutions. Here, the graph of the left side intersects the graph of the right side at x=4. There is exactly one solution, so the solution set is ...

  { 4 }

__

Solving this algebraically, you would isolate the radical, then "undo" it by squaring both sides of the equation. Then solve the resulting quadratic. That will have 2 solutions, only one of which will work in the original equation.

  √(5x +16) -2 = 3x -8 . . . . given

  √(5x +16) = 3x -6 . . . . . .  add 2

  5x +16 = (3x -6)^2 . . . . .  square both sides

  5x +16 = 9x^2 -36x +36 . . . . expand the square

  9x^2 -41x +20 = 0 . . . . . . subtract (5x+16) to put into standard form

Factors of 9·20 = 180 that have a sum of 41 are 5 and 36, so we can rewrite this equation as ...

  9x^2 -36x -5x +20 = 0

  9x(x -4) -5(x -4) = 0 . . . . . . factor by pairs

  (9x -5)(x -4) = 0

The values of x that make this equation true are the values that make the factors be zero: 5/9 and 4. Trying these in the equation, we find ...

  √(5(5/9) +16) -2 = 13/3 -2 = 2 1/3 . . . . value of the left side for x = 5/9

  3(5/9) -8 = -6 1/3 . . . . . . value of the right side for x=5/9; not the same

  x = 5/9 is NOT A SOLUTION

__

  √(5(4)+16) -2 = √36 -2 = 4 . . . . value of the left side for x = 4

  3(4) -8 = 12 -8 = 4 . . . . . . value of the right side for x=4. These are the same, so ...

  x = 4 is a solution

The set of solutions is then ...

  { 4 } . . . . . solution set

5 0
3 years ago
A total of four and x is less than or equal to 8
ANTONII [103]
4+x <u><</u> 8: i believe this would be the right answer

4 0
3 years ago
Simplify (3 - √7)(5 + √7)
MaRussiya [10]
You can use F.O.I.L. for this, which if you don't know stands for first outer inner last, so multiply the first in each parentheses, then the outer, then the inner, then the last. yours would be 3*5+3*√7+(-√7)*5+(-√7)*√7 => 15+3√7-5√7-7 => 8-2√7
Final answer:
8-2√7
Hope I could help :)
3 0
3 years ago
Read 2 more answers
Find the percent of increase:<br> Year 2005 2010<br> Population 3.2<br><br> (millions) 5.6
hjlf

Answer:

the answer is x4sqaured=2

mark me brainliest

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
What is the decimal equivalent of<br> 7/8<br> ?<br> A. 0.780<br> B. 0.870<br> C. 0.875<br> D. 0.885
Arturiano [62]
7/8 is equal to 0.875. Have a good day!
4 0
3 years ago
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