i need lots of help with 15 18 19 20 pls pls pls

The set builder notation of the inequality  - 3(7n + 3) < 6n is,

{n : n ∈ R, n > - 3 }.

Inequality is a relation that compares two numbers or other mathematical expressions in an unequal way.

The symbol a < b indicates that a is smaller than b.

When a > b is used, it indicates that a is bigger than b.

a is less than or equal to b when a notation like a ≤ b.

a is bigger or equal value of an is indicated by the notation a ≥ b.

Given, An inequality - 3(7n + 3) < 6n.

Now, distributing the terms we get,

- 21n - 9 < 6n.

- 21n - 6n < 9.

- 27n < 9.

27n > - 9.          (Think of moving the variable to the other side to make it

                                                                                                        positive).

n > - 27/9.

n > - 3.

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Answer:

I think B

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

If you follow rise/run

The rise over run is positive 2/3

Answer:

A = 750

Step-by-step explanation:

Start with what we know:

A = LW

L = 50

W = 15

Then we fill in the values we know into the equation to get our answer.

A = L, or 50, times W, or 15.

Our new equation is A = 50 × 15

And we solve to find our answer

A = 50 × 15 or A = 750

Answer: I think it’s 43

Step-by-step explanation:

Answer:

B.9

Step-by-step explanation:

you are just trying to find the number to make it equal to 18

Answer:

Step-by-step explanation:

The height of the equilateral triangle with the side x is:

We have h = 30, then find the value of x:

Correct choice is B

Answer:  B

Step-by-step explanation: Because mhanifa said so and he is always right

Answer:

39

Step-by-step explanation:

0.40 x 65 = 26

65 - 26 = 39

The school sold 39 early-admission tickets.

Answer:what is the question i have 40% but not 90%

Step-by-step explanation:

Answer:

About 8

Step-by-step explanation:

it probably will be 8 ......

Answer:

hhhsunf

Step-by-step explanation:

Answer:

csc

( 60 )

cos

( 390 ) − 4 cot   ( − 45 )

-19x+32

Step-by-step explanation:

Answer:

x= -2

x= 14

Step-by-step explanation:

Hope this is useful! have a wonderful night or day, God bless you!

Answer:

it's a

Step-by-step explanation:

we subtract 9 from the 30 in the other side. that makes 21

3x ≤ 21

x≤7

that means any answer possible is below 7.

Given:

The expression is:

[tex]-1(2x+3)-2(x-1)[/tex]

To find:

The simplified form of the given expression.

Solution:

We have,

[tex]-1(2x+3)-2(x-1)[/tex]

Using distributive property, we get

[tex]-1(2x+3)-2(x-1)=-1(2x)-1(3)-2(x)-2(-1)[/tex]

[tex]-1(2x+3)-2(x-1)=-2x-3-2x+2[/tex]

On combining like terms, we get

[tex]-1(2x+3)-2(x-1)=(-2x-2x)+(2-3)[/tex]

[tex]-1(2x+3)-2(x-1)=-4x-1[/tex]

Therefore, the simplified form of the given expression is [tex]-4x-1[/tex].

Note: The correct option is not available.

Answer:

umm i think you are hopefully im right lol

Answer:

550 kg

Step-by-step explanation:

if if we get 30 day as in a month show the sugar will be consumed equals to 2 kg per day soooo if there is 275 days x 2 kg equals to 550 kg sugar consumed by them

Answer:550 kg

Step-by-step explanation: 30 day as in a month show the sugar will be consumed equals to 2 kg per day so if there is 275 days x 2 kg equals to 550 kg sugar consumed by them.

i think sorry if its worng

Answer:

B

Step-by-step explanation:

f(x) = 3x - 7

g(x) = 8x + 2

f(x) * g(x) = (3x - 7)(8x + 2)     {Use FOIL method}

              = 3x*8x + 3x *2  +(-7)*8x + (-7)*2

             = 24x² + 6x  - 56x - 14      {Combine like terms}

             =24x² - 50x - 14  

Answer:

Simplifying

3x + -5 = 3x + -10

Reorder the terms:

-5 + 3x = 3x + -10

Reorder the terms:

-5 + 3x = -10 + 3x

Add '-3x' to each side of the equation.

-5 + 3x + -3x = -10 + 3x + -3x

Combine like terms: 3x + -3x = 0

-5 + 0 = -10 + 3x + -3x

-5 = -10 + 3x + -3x

Combine like terms: 3x + -3x = 0

-5 = -10 + 0

-5 = -10

Solving

-5 = -10

Step-by-step explanation:

The solution is, solutions in the equation 3x + 5 = 3x + 10 is no solution.

Simplify simply means to make it simple. In mathematics, simply or simplification is reducing the expression/fraction/problem in a simpler form. It makes the problem easy with calculations and solving.

here,, we have,

Simplifying

3x + -5 = 3x + -10

Reorder the terms:

-5 + 3x = 3x + -10

Reorder the terms:

-5 + 3x = -10 + 3x

Add '-3x' to each side of the equation.

-5 + 3x + -3x = -10 + 3x + -3x

Combine like terms: 3x + -3x = 0

-5 + 0 = -10 + 3x + -3x

-5 = -10 + 3x + -3x

Combine like terms: 3x + -3x = 0

-5 = -10 + 0

-5 = -10

Solving

-5 = -10

Hence, The solution is, solutions in the equation 3x + 5 = 3x + 10 is

no solution.

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Answer:

1. 904.8

2. 5575.3

3. 381.7

4. 310.3

5. 137.3

6. 14137.2

7. 1767.2

8. 1317.1

9. 179.6

10. 1150.4

Step-by-step explanation:

Answer: A

Step-by-step explanation: i am 88% sure

Answer:

I.

Step-by-step explanation:

Answer:

2.5 cm

Step-by-step explanation:

let y represent the unknown distance

4 cm = 60 miles

y cm = 37.5 miles

we then cross multiply

4 × 37.5 = 60 x y

150 = 60 y

divide both side by 60

150/60 = 60y/60

y = 2.5cm

Answer:

0630 is the only thing I can come up with.

Answer:

2 mi =10560ft

Answer:

-3/2

Step-by-step explanation:

Because 3 is on the postive side and 2 is on the negative

Answer:

3/2

Step-by-step explanation:

Answer: A 128 square sm

Step-by-step explanation:

So the wedge consists of a square and a triangle. We need to find the area of both using 2 formulas:

A=1/2bh for triangle

A= l*w for square

Starting with the square 8*10=80 so the area of the square is 80 square cm

Now the triangle is 12*8/2 so = 48 square cm

So add the two to get 48+80= 128 Square centimeters which is choice A