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nirvana33 [79]
3 years ago
9

What is an equivalent expression for 2x + 10x and 2(x-4) + x

Mathematics
1 answer:
tester [92]3 years ago
6 0
2x+10x combine like terms
12x
2(x-4)+4 Distribute 2
2x-8+4
combine like terms
2x-4
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100 POINTS AND BRAINLY NO LINKS What is the length of the line segment with endpoints (−3, −8) and (10, −8) ?
Anika [276]

Answer:

13 units

given two points: (−3, −8) and (10, −8)

As the y coordinates are same.

use the method:

|x2| + |x1|  where  (x1, y1), (x2, y2)

Solve:

|10| + |-3|

10 + 3

13

3 0
2 years ago
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Use elimination method to solve the system of equations choose the correct ordered pairs 3x-4=-30 3x+2y=6
DiKsa [7]
The answer is C(-2, 6).

I think you forgot the y in the first equation (with the -4.
4 0
3 years ago
Divide.<br> Write your answer in simplest form.<br> 1/9÷5/4=
irina [24]

Answer:

4/45

Step-by-step explanation:

when dividing fractions, you multiply the first fraction by the second fraction's reciprocal :

1/9 divided by 5/4

1/9 multiplied by 4/5

essentially, you switch the signs from division to multiplication, and reverse the second fraction.

1/9 multiplied by 4/5

1/9*4/5 = 4/45

3 0
2 years ago
Read 2 more answers
Help pls ????????!!!!!!
7nadin3 [17]

Answer:

let the number of steps taken by friend 1, 2 and 3 be: x, y and z respectively

we know that the mean of the total steps taken by all the friends is 10,350

Since the formula for mean is: sum of all values / number of values

here, the total values is the total number of steps taken

So,

steps taken by friend 1  +steps taken by friend 2 +steps taken by friend 3 +steps taken by friend 4 +steps taken by friend 5 +steps taken by friend 6

all that divided by 6 will give us the mean

so,  <em>7800 + 8000 + 9800 + x + y + z / 6</em>

<em>(25600 + x + y + z)/6 = 10350</em>

<em>25600 + x + y + z = 10350 * 6</em>

<em>x + y + z = 62100 - 25600</em>

x + y + z = 36500

So since the sum of x, y and z is 36500,

we can say that the average value of x , y and z is 12167 (36500/3)

So the next thing to make an equation out of is Median

to find the median, we need to arrange the values in any order you like, i will arrange in descending order

so since the estimated value of all x , y and z is greater than the greatest known value:

x > y > z > 9800 > 8000 > 7800

Since this set of values has an even number of values, we will take the average of the middle 2 values as the median

<em>(9800 + z)/2 = 10000</em>

<em>9800 + z = 20000</em>

z = 10200 -------- we have found one of the three values! getting closer

Now, the final equation will be found from the range

since we already have sorted our data, and the difference of the highest and lowest is the range

x > y > z > 9800 > 8000 > 7800

So, x - 7800  = 7500

x = 15300 ------- now that we have x and z, we can use the first equation to find the value of y and we will be done!

<em>x + y + z = 36500</em>

<em>replacing the values</em>

<em>15300 + y + 10200 = 62100</em>

<em>y = 36500 - 25500</em>

<em>y = 11000</em>

So the three remaining friends walked

15300, 11000 and 10200 steps

6 0
3 years ago
A number cube is rolled 450 times. the number 3 comes up 67 times.a. what is the theoretical probability of rolling a 3? write y
OLga [1]
1- If the other 5 numbers on the cube aren't 3 the probability is 1/6

2-(Sorry I don't speak English well and I didn't understand the question) I think it's refereed to the first sentence, so it's 67/450=1/75
7 0
3 years ago
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