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Novosadov [1.4K]
3 years ago
5

Find all values of k so that each trinomial 2 x^2+ kx+12

Mathematics
1 answer:
n200080 [17]3 years ago
6 0
K can be 10,11,14,25

Work
(2x+4)(X+3)
(2x+3(X+4)
(2x+6)(X+2)
(2x+2)(X+6)
(2x+1)(X+12)
(2x+12)(X+1)
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What is the exponent on the 10 when 81,000,000 is converted to scientific notation?
Norma-Jean [14]

Answer:

8.1 x 10^7 would be you answer.

5 0
3 years ago
The next model of a sports car will cost 5.2% less than the current model. The current model costs $41,000. How much will the pr
Ivanshal [37]

The price will decrease by $2132

<u>Step-by-step explanation</u>

Given that the next model of the sports car will cost 5.2% less than the current model.

The price of the current model=$41000

The price of the next model will be 5.2% less than $41000

price\ of\ next\ model=price\ of \ current \ model \times(100-5.2)/100\\=41000\times 94.8/100\\=38868

decrease in price=41000-38868=2132

There is a $2132 decrease in prize of the sports car.

3 0
3 years ago
Can any one solve this.?
SpyIntel [72]

Answer:

x = 1

Step-by-step explanation:

Expand brackets

2x + 16 - 4x = 10x + 4

Rearrange so that x's are on one side and whole numbers are on the other

2x - 4x - 10x = 4 - 16

Simplify

-12x = -12

Make x on its own

x = 1

3 0
3 years ago
Define a variable, write an equation and solve: An investment increased 30% before taxes. $200 was withdrawn to pay taxes and th
strojnjashka [21]

Answer:

$1307.69

Step-by-step explanation:

Let the original investment be x.

Note that a 30% increase in a value is equal to multiplying a value by 130% and a withdrawal is to take out money. The final amount is $1500. Let’s write the equation with the information we have.

Equation:

130%x - 200 = 1500

(130/100)x = 1700

x = 1700(100/130) = $1307.69

I hope this helps! :)

7 0
3 years ago
Solve 2x2 + 12x − 14 = 0 by completing the square, options: A. 2(x + 6)2 = 26; x = −6 + square root 13, x = −6 − square root 13
musickatia [10]
I just solved this one
anothe way is undistribute the 2 first and move -14 to side
2(x^2+6x)-14=0
comlete the squer inside and add negative
2(x^2+6x+9-9)-14=0
factor perfect square
2((x+3)^2-9)-14=0
distribute
2(x+3)^2-18-14=0
2(x+3)^2-32=0
add 32 both sides
2(x+3)^2=32
divide 2
(x+3)^2=16
sqrt both sides
x+3=+/-4
minus 3
x=-4-3 or 4-3
x=1 or -7

answer is C

8 0
3 years ago
Read 2 more answers
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