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Sphinxa [80]
3 years ago
15

Solve 2x+7=x-3 Please can u show your working out

Mathematics
2 answers:
Korolek [52]3 years ago
7 0
X= -10
You may review the image Ive attached to see how I got this answer.

Alexxandr [17]3 years ago
7 0
Subtract 7 from both sides.
1. 2x + 7 - 7 = x - 3 - 7
now the equation reads like this 
 2x = -10 + x
subtract x from both sides 
2. 2x - x = -10 + x - x
now the equation reads like this
x = -10
then you have your answer
3. x = (-10)
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Find the four arithmetic means between 100 and 135. Show work.
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Answer:

Please read the answers below.

Step-by-step explanation:

Let's calculate the four means between 100 and 135, this way:

1. Arithmetic mean:

(100 + 135)/2 = 117.5

2. Weighted mean:

We will assign equal weight to both numbers : 5

(100 * 5 + 135 * 5)/10 = (500 + 675)/10 = 1,175/10 = 117.5

3. Geometric mean:

√100 * 135 = √13,500 = 116.2 (Rounding to the next tenth)

4. Harmonic mean:

2/(1/100 + 1/135) = 2/(0.01 + 0.0074) = 114.9 (Rounding to the next tenth)

7 0
3 years ago
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