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Nuetrik [128]
3 years ago
11

Khan academy algebra video why we do the same thing to both sides of an equation

Mathematics
1 answer:
svlad2 [7]3 years ago
4 0
I haven't seen this video but the way I think of it is to compare the equation with a chemical balance.  Both sides have equal weights and the pointer is at zero. To maintain the pointer at zero if we add/take away a weight from one side we have to do the same thing on the other side.
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Solve -mk - 90> 85 solve for m
Vikentia [17]
Let's solve for k. (-m)(k) - 90>85

step 1: add 90 to both sides.
-km -90+90> 85+90
- km > 175

step 2: divide both sides by -m
-km >175
-m -m

K< -175
m
7 0
3 years ago
Complete the equation of the line whose slope is -2 and y-intercept is(0,−8)<br> y=
dybincka [34]

Answer:

y = -2x - 8

Step-by-step explanation:

The slope is -2 and the y-intercept is (0,-8).

Plug into the slope-intercept equation: y = mx + b.

7 0
3 years ago
Simplify: |(–3.86 + 6.82)| + |(4.02 – 12.45)|
Lana71 [14]

600dot82 - 1229

———————--

100

4 0
3 years ago
1/5 as a decimal..........
Fofino [41]
.2 is 1/5 as a decimal, because 2/10 broken down is 1/5. we have to write it this way (0.2) because there is no fifths place. 
4 0
3 years ago
Read 2 more answers
What is the volume of this cone? Use 3.14 for r and round your answer to the
enot [183]

Answer:

39.5 in^3

Step-by-step explanation:

lol someone had the same question

The formula for a cone is (pi)(r^2)(h/3)

Since we have to use 3.14 for pi, we plug 3.14 in for pi:

(3.14)(r^2)(h/3)

The radius is 2 and the height is 8, so we plug in those numbers:

(3.14)(2^2)(8/3)

Simplify:

(3.14)(4)(2.666...)

Multiply:

(12.56)(2.666...) -> 39.49333...

Finally, we round 39.49333... to the tenths place:

39.5

Hope this helps :)

5 0
2 years ago
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