Mathematics High School

I need this problem worked out. I already know the answer just not the work.

Answers

Answer 1

Answer

n = 30

Explanation

To solve for n, you have to isolate it by 'getting rid' of the 18, 2, and negative sign.

You 'remove' these numbers in backward PEMDAS.

So to 'remove' the 18, you subtract both sides by 18.

3-18 = -15

-n/2+18-18 = -n/2

So now you are left with -15 = -n/2.

To 'get rid' of the 2, you multiply each side by 2.

-15×2 = -30

-n/2×2 = -n

And now you have -30 = -n.

To 'get rid' of the negative sign, you multiply both sides by -1.

-30×-1 = 30

-n×-1 = n

So you get 30 = n or n = 30.

If you still have questions I'll answer them in the comments (under this question).

Related Questions

Multiply.
(5x + 4)^2

Answers

Answer: 25x^2 + 40x + 16

Explanation: Apply perfect square formula
(5x)^2 + 2 * 5x * 4 + 4^2
Simplify

The multiplication of the given equation i.e. [tex](5x + 4)^2[/tex] should be considered as the [tex]25x^2 + 40x + 16[/tex].

Calculation of the equation:

Since the given equation is [tex](5x + 4)^2[/tex]

We have to break this equation

So, it can be like

[tex](5x)^2 + 2 \times 5x \times 4 + 4^2[/tex]

[tex]25x^2 + 40x + 16[/tex]

Hence, we can conclude that The multiplication of the given equation i.e. [tex](5x + 4)^2[/tex] should be considered as the [tex]25x^2 + 40x + 16[/tex].

Learn more about an equation here: https://brainly.com/question/17069398

20 POINTS!!!!

b-7/4 = 1/2

explain your thinking

Answers

Answer:

B=86

Step-by-step explanation:

So first step is add 74 to 12 because if you subtracted b with 74 and to reverse that you have to add and 74+12=86 and that is what b equals

Is a shirt is on sale for a 20% discount what would be the price of an $18 shirt

Answers

Answer:

iS 18 THE Price AFTER Discount

Step-by-step explanation:

Answer:

14.40$

Step-by-step explanation:

20% of 18 is 3.6

18-3.6= 14.4

Which expression represents the greatest common factor (GCF) of 110 and 132?
A. 2 x 11
B. 2 x 5 x 7
C. 2 x 3 x 7
D. 5 x 7

Answers

Answer:

(B) 2x5x7

Step-by-step explanation:

Answer:

hope this helps! :)

n - 31
= 2
4
I really need help with this one

Answers

Answer:

Step-by-step explanation:55-31=24

-39 hahahihsbebwkqjaj

There are 16 girls and 18 boys in a class. The teacher chooses a student's name at random to answer a question.
What is the probability that the teacher chooses a girl to answer the question?
A
1
34
O
B.
16
OO

Answers

Answer:

8/17

Step-by-step explanation:

16 girls and 18 boys in a class

Total number of students:

16 + 18 = 34

Probability of choosing a girl:

P(g) = number of girls / total numberP(g) = 16/34 = 8/17

Question 21 (5 points)
Saved
The equation 3(4x) = (4x)3 illustrates which property?
O multiplicative inverse
distributive
O commutative
O associative

Answers

Answer:

Step-by-step explanation:

PLEASE SIMPLIFY THIS

Answers

Answer:

15y / 8

Step-by-step explanation:

Multiplying by 2 to get the common denominator.

3y / 4 * 2 = 6y / 8

Combine like terms.

6y / 8 + 9y / 8

Final Answer:

15y / 8

The equation P = 21 + 2w can be used to find the perimeter of a rectangle. A 1 point rectangular shaped playground is enclosed by a fence that is 500 m. The length of the playground is 120 m. Use the equation to determine the width of the playground *

Answers

Answer:

130 m

Step-by-step explanation:

Given:

P = 2l + 2wP = 500 m

Length is:

l = 120 m

Substitute values and solve for w:

500 = 2*120 + 2w2w = 500 - 2402w = 260w = 260/2w = 130 m

sound travels about 340 m / s. The function d(t) = 340t gives the distance d(t), in meters that sound travels in t seconds. How far does sound travel in 63 s?

I need the answer quickly please! :)

Answers

Answer:

d(63)=21,420m

Step-by-step explanation:

d(t)=340t

D=Distance

T=Time

D(63)=21,420

Mildreda bought 3 boxes of pencils. There were 4 pencils in each box. Which shows how Mildreda could figure out how many pencils she bought?

Answers

Answer: 12

Step-by-step explanation:

4 x 3 =12

3) y=-3.x + 5
5x – 4y=-3
solve with substitution

Answers

Answer:

x=1,y=2

Step-by-step explanation:

The marked price of a water cooler is $ 4650. The shopkeeper offers an off-season discount of 18% on it. Find its selling price.

Answers

Answer:

3813

Step-by-step explanation:

M.P of water cooler=$4650

Discount% on water cooler=18%

Discount on water cooler=18/100*$4650 i.e.$837

So,selling price=$4650-$837i.e.$3813 Ans.

Answer:

3813

Step-by-step explanation:

the formula will be 18 upon 100 multiply by 4560. the answer is 837. now subtract the original price from the discount. 4560-837 is 3813 which is ur answer.

Graph the inequality for X - 3 > 7.

Answers

Answer: x>10

Step-by-step explanation:

X-3>7

(X-3) +(-7)>7+(-7)

X-3-7>7-7

X-10>0

(X-10)+10>10

<---8-----6-----4-----2---0----2---4----6---8 (10)-----12->

Calculate the slope of the passing line through each pair of points: (8, 6) and (-1, 6)

Answers

Answer:

[tex]\displaystyle m=0[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Algebra I

Slope Formula: [tex]\displaystyle m=\frac{y_2-y_1}{x_2-x_1}[/tex]

Step-by-step explanation:

Step 1: Define

Point (8, 6)

Point (-1, 6)

Step 2: Find slope m

Simply plug in the 2 coordinates into the slope formula to find slope m

Substitute in points [SF]: [tex]\displaystyle m=\frac{6-6}{-1-8}[/tex][Fraction] Subtract: [tex]\displaystyle m=\frac{0}{-9}[/tex][Fraction] Divide: [tex]\displaystyle m=0[/tex]

Which ordered pair is a solution of the equation y=-5/4x -2
a. (-8,8)
b. (-8,-12)
c. (8,-8)
d. (1,-15/4)
PLEASE HELP

Answers

Answer:

Step-by-step explanation:

i just had that question

George is in charge of
prepping a pinata for a
party. He puts 72 pieces of
candy in the pinata. If
each person gets 2/8 of the
candy, how many pieces of
candy will each person
receive?

Answers

It would most likely be that each person gets 18 pieces of Candy

63n^3+54n^2-105n-90
Please help me factor by grouping

Answers

Answer:3(7n+6)(3[tex]n^{2}[/tex]-5)

Step-by-step explanation:

Dana buys a cat pillow for 43.00 the sales tax is 7%?

Answers

Answer:

Step-by-step explanation:

43.00 = 100% = 1

7% = 0.07

So to work out the total price you need to times 43 by 1.07 = 46.01

GEW has angle measures given by m/_G=5x + 66, m?/_ E = 3x, and m/_ W= 142 -4x whats the mesure of e

Answers

Answer:

21°

Step-by-step explanation:

GEW has angle measures given by m/_G=5x + 66, m?/_ E = 3x, and m/_ W= 142 -4x whats the mesure of e

= 5x + 66 + 3x + 142 - 4x = 180

4x + 208 = 180

4x = 208 - 180

4x = 28

x = 28/4

x = 7

Solving for E = 3x

E = 3 × 7

E = 21°

Please please help please please ASAP please please help please please ASAP please please help please please ASAP please please help please please ASAP please please help

Answers

Answer:

37°

Step-by-step explanation:

Answer:

Step-by-step explanation:

all triangle = 180

53 + 90=143

180 - 143 = 37

Sue is a baker. She has a famous cupcake recipe that calls for 7.5 cups of sugar for every 1.2 cups of butter. How many cups of butter are needed for each cup of sugar?

Answers

Answer:

1 cup sugar to 0.16 cup butter

Step-by-step explanation:

i like f ing you in public, she said 'me too'

7.5 cups:1.2 cups butter

1 cup:0.16 cup

A car travels about 45 feet in one second. At this speed,
about how many feet will the car travel in 3 seconds?
A
1,250 feet
B
1,500 feet
с
150 feet
D
135 feet

Answers

The correct answer for the giving question it number 4

I agree, the answer is D because you if you do 45 * 3 = 135

A plant farm sells bundles of rose bushes. Each bundle contains 150 rose bushes and has the same ratio of
hybrid tea roses, climbing roses, tree roses, and miniature roses. A landscaper purchased 1 bundle of rose bushes and
found the bundle contained 9 climbing roses. He buys a second bundle of rose bushes for a large planting job he
needs to complete, bringing his total to 300 rose bushes. How many of the roses being planted will NOT be climbing
roses?

Answers

Answer:

282

Step-by-step explanation:

I need some help ? Does anyone know this:)I’m new too this thats why im asking loll

Answers

Answer:

Step-by-step explanation:

Answer: 9 in

Step-by-step explanation: area = (base x height)/ 2 You multiply base (6) times height (3), and then divide it by 2.

Simplify the following expressions. All answers should be in standard form.
[tex]5x(3x + 2)[/tex]

Answers

Answer:

The given expression in simplified form is: [tex]15x^2+10x[/tex]

Step-by-step explanation:

Simplifying the expression involve reducing the number of terms to minimum and making the expressions in standard form.

This may involve addition, subtraction and multiplication of variables.

Given expression is:

[tex]5x(3x+2)[/tex]

Distributing 5x will give us:

[tex]= 5.3.x.x + 5.2.x\\=15x^2+10x[/tex]

Hence,

The given expression in simplified form is: [tex]15x^2+10x[/tex]

what is the solution to the graph system graphed below

Answers

Answer:

(-4, -1)

General Formulas and Concepts:

Algebra I

Solving systems of equations by graphing

Step-by-step explanation:

Where the 2 lines intersect would be the solution set of the systems of equations.

Graph the function.
f(x) = -5/4x +4

Answers

Answer:

1. Put a dot at y=4

2. Go DOWN 5 blocks, go RIGHT 4 blocks

3. Put a dot at this point

4. Connect your 1st dot to the second dot for your first line segment

5. Follow the pattern

The distance on a map is 4.5 cm. The scale of the map is 1 : 1000. What is the actual distance?. Single choice.

Answers

Answer:

Actual distance is 4500 cm (45 m).

Step-by-step explanation:

A scale is a representative fraction that can be used to either increase or decrease proportionally the dimension of a given object.

scale = [tex]\frac{distance on map}{actual distance}[/tex]

It is in the form of a ratio.

From the question, Distance on map = 4.5 cm,

scale = 1 : 1000

= [tex]\frac{1}{1000}[/tex]

scale = [tex]\frac{distance on map}{actual distance}[/tex]

Let the actual distance be represented by d.

So that,

[tex]\frac{1}{1000}[/tex] = [tex]\frac{4.5}{d}[/tex]

⇒ d = 4.5 x 1000

= 4500

d = 4500

The actual distance is 4500 cm (45 m).

Nate is saving up to purchase a new computer. He has $175 already and can 1 point save $20 per month. How long will it take him to save $515? *

Answers

Answer:

17 months

Step-by-step explanation:

The amount he has = $175The target amount = $515

Amount to be saved:

$515 - $175 = $340

Number of months:

$340/$20 = 17

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