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Iteru [2.4K]
3 years ago
13

Factor this trinomial. x2+3x-4

Mathematics
2 answers:
Vinvika [58]3 years ago
8 0
          x² + 3x - 4
 rewrite with two middle terms that add to give three but multiply to yield -4
         x² + x - 4x - 4
           
by factorizing
       x(x + 1) - 4(x + 1)

⇒   (x - 4) (x + 1) = x² + 3x - 4
trapecia [35]3 years ago
4 0

Answer:

(x - 1)(x + 4)

Step-by-step explanation:

So basically, we need two numbers that add to get 3 and multiply to get -4.

We can use -1 and 4.

-1 + 4 = 3

-1 * 4 = -4

So, this makes it true.

Best of Luck!

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I need help please, I dont know how to do this
Oliga [24]

Answer:

Step-by-step explanation:

Odd numbers backwards - 9, 7, 5, 3

1 = -2+9=7

2 = -1+7=6

3 = 0+5=5

4 = 1 +3=4

3 0
3 years ago
What is the discount given on a jacket that was originally priced $90 and is now $72?
torisob [31]

Answer:

Step-by-step explanation:

The disCount will be the differenceb

7 0
3 years ago
The cost of a council tax bill increased by 5%.
andreyandreev [35.5K]

The council tax bill before the increase is £1240

The equation that represents the percentage increase in council tax bill is :

percentage increase x t = £62

Where t represents the initial council tax bill - council tax bill before the 5% increase

5% x t = £62

0.05 x t = £62

Divide both sides of the equation by 0.05

t = £62 / 0.05 = £1240

To check if the answer derived is correct : 5% x 1240 = 62.

A similar question was answered here: brainly.com/question/12066598?referrer=searchResults

5 0
3 years ago
Can someone help me with the meaning of percent
LekaFEV [45]

69 out of 100 would be 69/100 = 0.69 = 69% were answered correctly

100% - 69% = 100-69 = 31 = 31%  = 31/100 were incorrect

8 0
3 years ago
After a storm, a tree lies as shown. What was the original height of the tree? (Round to the nearest whole foot.)
Andreyy89
Using the Law of Sines, sina/A=sinb/B=sinc/C (although there are other ways considering that this is a 30, 60, 90 degree triangle with a basic identity) we can say:

97/sin60=x/sin30=y/sin90

x=97sin30/sin60 and y=97sin90/sin60

The total height of the tree is h=x+y so

h=97sin30/sin60 + 97sin90/sin60

h≈168.01 ft (to the nearest hundredth of a foot)

h≈168 ft (to nearest foot)


3 0
3 years ago
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