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baherus [9]
3 years ago
13

Use the quadratic formula to solve the equation. -2x^2-x+7=0.

Mathematics
1 answer:
Furkat [3]3 years ago
8 0
<span>-2x^2-x+7=0  
Variable with the highest degree's (exponent) constant, -2 is a, next variable's constant, -1 is b, the constant or number without a variable, 7 is c

using substitution put the numbers into the formula
</span>(-b±√(b^(2)-4ac))/(a^(2))

(-(-1)±√((-1)^(2)-4(-2)(7))/((-2)^(2)) simplify 

(1±√(1+56))/4

1±√(57)/4 is your answer
You might be interested in
9s plus 3=57 pls help me
m_a_m_a [10]
Your ultimate goal is to get the variable secluded all by itself.  You'll have to use the opposite operation to do this and remember, what you do to one side, you have to do to the other.
1. 9s + 3 = 57
2. Subtract 3 from each side. This will result in 9s = 54
3.  To undo the multiplication of 9s you'll divide both sides by 9.  9s/9 = 54/9
4.  The ending result is: s=6
5.  Go back and check your work by substituting it in your original equation.
4 0
3 years ago
How many ways can a 6 question quiz be answered with 4 choice answers?
Setler79 [48]
Chose from 6 answers only 4. When you chose one to use in the first place, you cant use it again so, choice narows to 5, and then narows to 4 and 3. Then just multiply numbers and whoila, there is your answer=300. There are 300 combinations to answer the quiz

6 0
3 years ago
12 is at most a number decreased by seven
Karo-lina-s [1.5K]

Answer:

12 ≤ x - 7

Step-by-step explanation:

let "x" represent the number

The term decreased means subtraction.

The problem indicates that 12 cannot be greater than a number decreased by 7. Use ≤ which means less than or equal to.

≤ less than or equal to 12 means that 12 is the maximum value.

8 0
4 years ago
Please help i do not understand.. ):
Paraphin [41]

Answer:

Your answer should be 18, that's what I got:)

Step-by-step explanation:


4 0
3 years ago
A manufacturer finds that the revenue generated by selling x units of a certain commodity is given by the function R(x) = 60x −
bonufazy [111]
R(x) = 60x - 0.2x^2

The revenue is maximum when the derivative of R(x) = 0.
dR(x)/dx = 60 - 0.4x = 0
0.4x = 60
x = 60/0.4 = 150

Therefore, maximum revenue is 60(150) - 0.2(150)^2 = 9000 - 4500 = $4,500
Maximum revenue is $4,500 and the number of units is 150 units
7 0
3 years ago
Read 2 more answers
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