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creativ13 [48]
3 years ago
13

How many solutions are there? 3(2x + 7) = 13 + 4(x + 2) + 2x

Mathematics
1 answer:
vichka [17]3 years ago
4 0

Answer:

No solution

Step-by-step explanation:

Using this equation, I could expand it to 6x+7=4x+21+2x. After this, I seperate the x values from the plain numbers. Once I do this, I get 0x = -14. This shows that there is no solution.

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Which of the following is the endpoint of the altitude of a regular pyramid
larisa [96]
It’s either vertex or base
4 0
4 years ago
The difference of the squares of two distinct positive numbers is equal to twice the square of their difference. What is the rat
Orlov [11]

Answer:

1:3

Step-by-step explanation:

The difference of the squares of two distinct positive numbers is equal to twice the square of their difference. What is the ratio of the smaller number to the larger?     I'll call the numbers a  and b.

a² - b²  =  2(a-b)²

a² - b²  =  2(a-b)(a-b)   First Outside Inside Last  (a-b)(a-b)

a² - b²  =  2(a²-ab-ab+b²) = 2(a²-2ab+b²) = 2a² - 4ab + 2b²

a² - b²  =  2a² - 4ab + 2b²   subtract a² - b² from both sides

<u>-a² + b²       -a² + b²</u>

0 = a² -4ab +3b²   factor into multiplication of two binomials. What factors (two

                             numbers multiply) to 3 add up to -4? The only two numbers

                             are -3 and -1.

0 = (a-3b)(a-1b)     set each binomial equal to zero and solve

0   =   a-3b      or      0   =  a-1b

<u>+3b     +3b</u>      or     <u>+1b       +1b</u>

3b = a             or       1b = a

1:3 or 1:1 (but 1:1 says they are the same number, so if there is a smaller number, only 1:3 is correct)

5 0
4 years ago
What is the slope of a line that passes through the points ( -1, 9) and (3,6)?
Sedbober [7]

Answer:

-¾

Step-by-step explanation:

Slope=m

(-1,9) (3,6)

m= Y2-Y1 / X2-X1

m=6-9/3-(-1)

m=-3/3+1

m=-3/4

4 0
2 years ago
milo is talking to his sister lisa about factors. he said he thinks that any even number always has more factors than any odd nu
UkoKoshka [18]

Answer:

I agree with Lisa

Step-by-step explanation:

* Lets explain the meaning of the factors of a number

- Factors are the numbers you multiply to get another number

- Ex: factors of 12 are 1 , 2 , 3 , 4 , 6 , 12 because

 1 × 12 = 12 , 2 × 6 = 12 , 3 × 4 = 12

- 1 is a factor every number

- The number is a factor of itself

* Lets solve the problem

- Milo said he thinks that any even number always has more

 factors than any odd number

- Lisa said she doesn't agree with him

* Lets take some examples for even and odd number to prove who

 is right

- We will chose numbers between 1 and 22

# Even numbers: 2 , 4 , 14 , 18

# Odd numbers: 3 , 9 , 15 , 21

∵ The factors of 2 are 1 , 2

∴ 2 has 2 factors

∵ The factors of 4 are 1 , 2 , 4

∴ 4 has 3 factors

∵ The factors of 14 are 1 , 2 , 7 , 14

∴ 14 has 4 factors

∵ The factors of 18 are 1 , 2 , 3 , 6 , 9 , 18

∴ 18 has 6 factors

∵ The factors of 3 are 1 and 3

∴ 3 has 2 factors

∵ The factors of 9 are 1 , 3 , 9

∴ 9 has 3 factors

∵ The factors of 15 are 1 , 3 , 5 , 15

∴ 15 has 4 factors

∵ The factors of 21 are 1 , 3 , 7 , 21

∴ 21 has 4 factors

∵ The number of the factors of the even numbers are 2 , 3 , 4 , 6

∵ The number of the factors of the odd numbers are 2 , 3 , 4

∴ The Factors of even numbers and odd numbers are equal

  like 2 and 3 , 4 and 9 , 14 and 15

 <em>OR</em>

  The factors of even number greater than the factors of the odd

  number like 18 the number of the factors of 18 is greater than the

  number of the factors of all odd numbers above

∴ <em>Not always that any even number has more factors than any odd</em>

<em>   number</em>

∴ I agree with Lisa

8 0
4 years ago
Please help explain good luck
Tcecarenko [31]

Answer:

27

Step-by-step explanation:

Remember to follow PEMDAS. Note that, when multiplying or dividing:

1) one positive and one negative = negative number

2) two positive = positive number

3) two negative = positive number

(-7)(-5) = -7 * -5 = 35

+(-8) = +1 * -8 = -8

Subtract:

35 - 8 = 27

27 is your answer.

~

8 0
3 years ago
Read 2 more answers
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