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Svetradugi [14.3K]
3 years ago
12

Work out the value of x.

Mathematics
1 answer:
Alona [7]3 years ago
3 0
2x+3x=180
5x=180
x=180/5
x=36
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Solve x2 + 2x = 4 for x by completing the square. x equals plus or minus square root of 5 plus 1 x equals plus or minus square r
steposvetlana [31]

Answer:

x equals plus or minus square root of 5 minus 1

Step-by-step explanation:

we have

x^{2} +2x=4

Divide by 2 the coefficient of the x-term

2/2=1

squared the number

1^2=1

Adds both sides

x^{2} +2x+1=4+1

x^{2} +2x+1=5

Rewrite as perfect squares

(x+1)^{2}=5

take the square root both sides

x+1=(+/-)\sqrt{5}

x=(+/-)\sqrt{5}-1

therefore

x equals plus or minus square root of 5 minus 1

4 0
3 years ago
Solve for x in the equation x^2-12x+36=90
Nitella [24]

Answer:

a

Step-by-step explanation:

someone already answer this

brainly.com/question/8084861

5 0
3 years ago
Mr. Fat needs 20 minutes to eat a pound of cereal, while Mr. Thin needs 30 minutes. If they eat together, how long does it take
marishachu [46]
36 minutes.

(1/20)x+(1/30)x=1solve for x (x=0.8333333333......)
Considering they take the same times for all 3 pounds,
That would mean that since 1 pound takes 12 minutes, then 3 pounds take 36 minutes
4 0
4 years ago
A volunteer stuffs 228 envelopes in an hour. What is the average number of envelopes the volunteer stuffs per minute?
Julli [10]
228/60=3.8 is the answer
8 0
3 years ago
Read 2 more answers
[(7+3)x5-4](divided by) 2+3<br> SHOW ALL WORK WILL MARK BRAINLIEST <br> PLEASE HURRY
Mnenie [13.5K]
BIDMAS so do the 7+3 first = 10
[10 x 5 - 4] (divided by) (2+3)
then work out both brackets by doing the multiplication first
[10 x 5 - 4] = [50 - 4] = 46
(2 + 3) = 5
46 divided by 5 = 9.2
8 0
3 years ago
Read 2 more answers
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