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Alika [10]
3 years ago
12

What are the mental math steps to find 7(42)

Mathematics
1 answer:
Kaylis [27]3 years ago
8 0
7*40 = 280, 7*2 = 14,
 add both and  get 280+14 = 294
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What are the roots of the polynomial equation 3x^4+12x^2=6x^3
Dominik [7]
Factor the equation to give
3x^4+12x^2=6x^3
3x^4+12x^2-6x^3=0
x^2(3x^2+12-6x)=0
By the zero product property, either x^2=0 or (3x^2+12-6x)=0 or both.
If x^2=0, then x=0
if (3x^2+12-6x)=0, we use the quadratic formula to solve for x
where x=1 ± √ (3) i

Answer: the roots of <span>3x^4+12x^2=6x^3 are {0 (multiplicity 2), 1+&radic;3 i, 1-&radic;3 i}</span>
7 0
3 years ago
28/29 and 30 please short explanation thanks
Bond [772]

Answer 28.

Possible values for the three factors of -3

  1. 1, -1 and 3
  2. -1.5, 1 and 2
  3. 1.5, -1 and 2  
  4. 1.5, 1 and -2

Answer 29.

The product of two nonzero integers will be less than or equal to both of the integers if they are multiplied by number itself and one or by number itself and one with negative sign.

Answer 30.

The sign of the product of three integers with the same sign will be positive or negative. If odd number of same sign is multiplied, the product will be of that sign.

(+)  (+)  (+) = (+)

(-)  (-)  (-) =  (-)

3 0
3 years ago
Evangeline is making snack bags for her class. If she can fill 5/8 of her snack bags with 1 2/3 cups of pretzels, how many cups
brilliants [131]

Answer:

2 2/3

Step-by-step explanation:

For each of her snack bag, she can fill it with a 1/3 cup of pretzels

1/3 x 8 = 2 2/3 cups

4 0
2 years ago
What is the approximate average rate of change of the function f(x) = -20(1.3)x^
ollegr [7]

Answer:

c

Step-by-step explanation:

7 0
3 years ago
A 6-pack of undershirts cost 13.98.This is 3.96 less then the cost of buying 6 individual shirts.If each undershirt costs the sa
mihalych1998 [28]
1.67 is your answer 13.98 - 3.96=10.02 10.02 divided by 6 = 1.67
Hope I helped
8 0
2 years ago
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