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Mars2501 [29]
3 years ago
6

Solve the equation 6 = -9 – 6x for x.

Mathematics
1 answer:
Evgesh-ka [11]3 years ago
8 0

Answer:

a. -5/2

Step-by-step explanation:

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Please help me now ! Thank you
jarptica [38.1K]
First we'll do two basic steps. Step 1 is to subtract 18 from both sides. After that, divide both sides by 2 to get x^2 all by itself. Let's do those two steps now

2x^2+18 = 10
2x^2+18-18 = 10-18 <<--- step 1
2x^2 = -8
(2x^2)/2 = -8/2 <<--- step 2
x^2 = -4

At this point, it should be fairly clear there are no solutions. How can we tell? By remembering that x^2 is never negative as long as x is real. 

Using the rule that negative times negative is a positive value, it is impossible to square a real numbered value and get a negative result. 

For example
2^2 = 2*2 = 4
8^2 = 8*8 = 64
(-10)^2 = (-10)*(-10) = 100
(-14)^2 = (-14)*(-14) = 196

No matter what value we pick, the result is positive. The only exception is that 0^2 = 0 is neither positive nor negative.

So x^2 = -4 has no real solutions. Taking the square root of both sides leads to

x^2 = -4
sqrt(x^2) = sqrt(-4)
|x| = sqrt(4)*sqrt(-1)
|x| = 2*i
x = 2i or x = -2i
which are complex non-real values


5 0
3 years ago
A method for finding the volume of any solid for which cross sections by parallel planes have equal area is called
goldenfox [79]
The answer is D, Cavalieri's Principle 
3 0
3 years ago
Find the next three terms:<br> 5, 8, 11, 14...
anyanavicka [17]

Answer:

next 3 terms are 17,20,23

Step-by-step explanation:

to get from 5 to 8 you add 3

14+3=17

17+3=20

20+3=23

8 0
3 years ago
Read 2 more answers
Which expression is equivalent to 3(4x+10÷2+3)?<br> a 12x+2<br> b 12x+6<br> c 12x+8<br> d 12x+24
elena-14-01-66 [18.8K]

Answer:

12x+2

Step-by-step explanation:

7 0
2 years ago
What is the equation in slope-intercept form of the line that passes through the points(-4,2) and (12,6) .​
Stels [109]

Answer:

y=0.5x

Step-by-step explanation: Plot the points then draw the line to then use the slope formula y=mx+b m is slope which is 1/2 which is 0.5, you can use either, and b is the y-intercept which is (0,0)

3 0
2 years ago
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