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Kaylis [27]
3 years ago
5

5(2x − 12) + 21 = 2x + 41 I know the answer is 10 but can someone explain how to get that?

Mathematics
2 answers:
inessss [21]3 years ago
7 0
X= 10.
use LCM to subtract fractions.
start with add/minus
then divide/times
then bracket

dsp733 years ago
6 0
5(2x-12)+21=2x+41\\\\5\cdot2x-5\cdot12+21=2x+41\\\\10x-60+21=2x+41\\\\10x-39=2x+41\qquad|+39\\\\10x-39+39=2x+41+39\\\\10x=2x+80\qquad|-2x\\\\10x-2x=2x+80-2x\\\\8x=80\qquad|:8\\\\\boxed{x=10}
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Rewrite using a single positive exponent.<br> 78<br> 73
vivado [14]
Hey! I don’t know if this is what you mean.. but I tried to understand it.

78^1
73^1

Have a good day :)
3 0
2 years ago
Can someone help me with number 8 please? Thank you.
Naddik [55]
Answer: -4 \le x \le 5
Note: to write the domain in interval notation, you'd write [-4,5]
if you need the domain in set-builder notation, then you'd write \left\{x|x\in\mathbb{R}, \ -4\le x\le 5\right\}

------------------------------------------------------------------------------

Explanation:

The domain is the set of possible x input values. Look at the left most point (-4,-1). The x coordinate here is x = -4. This is the smallest x value allowed. The largest x value allowed is x = 5 for similar reasons, but on the other side of the graph.

So that's how I got -4 \le x \le 5 (x is between -4 and 5; inclusive of both endpoints)

Writing [-4,5] for interval notation tells us that we have an interval from -4 to 5 and we include both endpoints. The square brackets mean "include endpoint"

Writing \left\{x|x\in\mathbb{R}, \ -4\le x\le 5\right\} is the set-builder notation way of expressing the domain. The x\in\mathbb{R} portion means "x is a real number"

6 0
3 years ago
4/5 times blank equals 2/5 what is blind
Sholpan [36]
If you would like to solve the equation 4/5 * x = 2/5, you can calculate this using the following steps:

4/5 * x = 2/5     /*5
4 * x = 2           /4
x = 2/4
x = 1/2

The correct result would be 1/2.
8 0
3 years ago
A motorcycle cost $12,000 when it was purchased. The value of a motorcycle decreases by 6% each year. Find the rate of decay eac
dalvyx [7]
<span>the rate of decay each month can calculated using the following formula:
</span><span>
6%/year × 1 year/(12 months) = 0.5%/month
0.06 x 1/12 = 0.005/month
</span><span>So the 0.5% is the right answer.
I hope it helped.</span>
4 0
3 years ago
49 decreased by twice a number
saveliy_v [14]

Answer:

3x-x+2=4

Step-by-step explanation:

6 0
3 years ago
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