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beks73 [17]
4 years ago
9

Solve 2x2 + 12x − 14 = 0 by completing the square.

Mathematics
1 answer:
mr Goodwill [35]4 years ago
3 0
Add 14 both sides
2x^2+12x=14
make term in front of x^2 1

divide both sid s by 2
x^2+6x=7
take 1/2 of 6 and square it and add to both sides (6/2=3 3^2=9)
x^2+6x+9=7+9
factor pefect square
(x+3)^2=16
sqrt both sides
x+3=+/-4
minus 3
x=+/-4-3
x=4-3 or -4-3
x=1 or -7

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Barack can buy a four pack of mangos for $2.76 or a six pack of mangos for $4.32. Which is the better buy? Explain.
podryga [215]

Answer:

Four pack of mangos for 2.76

Step-by-step explanation:

A four pack of mangos is 0.69 per mango while a six pack is

0.72 per mango

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Vanyuwa [196]
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x + (x + 2) + (x + 4) = 6216
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Answer:


Step-by-step explanation:

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a company manufactures and sells novelty Mugs. the manufacturing cost consist of a fixed cost of R8000 and a variable cost of R1
kvasek [131]
Ok so

8000=cost
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4 years ago
The chairman of the community bazaar is assigning people to chair committees. How many different ways can the 6 people be assign
iren [92.7K]

The 6 people be assigned in 720 different ways to chair the subcommittees.

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

Given that,

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This can be calculated by Permutation.

The number of arrangements in which the order of the objects matters is calculated as permutation.

The permutation is given as ⇒ P = n!

Here we can 6 people to be assigned. Therefore n = 6.

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4 years ago
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