Directions: Answeł the following qu
What is the value of this expression?
2 + 4 x 4 - 12
242

Answer:

$4.20

Step-by-step explanation:

The Writing Emporium sells pencils and pens individually.

Step 1

We have to first find the price of a pencil and a pen

Let:

The price of a pencil = x

The price of a pen = y

Alana buys a pencil and two pens for $1.10.

x + 2y = 1.1 ......Equation 1

x = 1.1 - 2y

Jeffrey buys two pencils and a pen for $1.00.

2x + y = 1 ........ Equation 2

We substitute 1.1 - 2y for x in Equation 2

2(1.1 - 2y) + y = 1

2.2 - 4y + y = 1

-4y + y = 1 - 2.2

-3y = -1.2

y = -1.2/-3

y = $0.4

Solving for x

x = 1.1 - 2y

x = 1.1 - 2(0.4)

x = 1.1 - 0.8

x = $0.3

Hence:

The price of a pencil = x = $0.3

The price of a pen = y = $0.4

Step 2

How much does Edward spend to buy six pencils and six pens from the Writing Emporium?

6x + 6y

6($0.3) + 6($0.4)

$1.8 + $2.4

= $4.20

Therefore, Edward spent $4.20 to buy six pencils and six pens from the Writing Emporium.

Answer:

13

Step-by-step explanation:

what number is 26% of 50 is the question

you can set up a proportion:   is  =   percent

                                                  of           100

what number 'is' = you are looking for this, so assign a variable

'of = 50

26% =  26  

            100

n  = 26      You can cross-multiply to find 'n'

50     100

100n = 1300

n = 13

Answer:

180=x+87

-87. -87

93 = x

The value if x is 93

Step-by-step explanation:

Answer:

(-7, -1)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Algebra I

Step-by-step explanation:

Step 1: Define Systems

5x - 9y = -26

-2x + 3y = 11

Step 2: Rewrite Systems

-2x + 3y = 11

Step 3: Redefine Systems

5x - 9y = -26

-6x + 9y = 33

Step 4: Solve for x

Elimination

Step 5: Solve for y

Answer:

x= -7

y= -1

Step-by-step explanation:

5x-9y= -26..............(1)

-2x+3y= 11...............(2)

5(-2x+3y= 11)

-10x +15y = 55................(3)

2(5x-9y= -26)

10x-18y= -52.....................(4)

Add equation 3&4

-10x+15y= 55

10-18y= -52

-3y= 3

y= -1

put y= -1 into equation ............(3)

-10x+15y= 55

-10x+15(-1)= 55

-10x-15 = 55

-10x= 55+15

-10x= 70

x= -7

Therefore;

x= - 7 and y= - 1

Answer:

c, d and e

Step-by-step explanation:

A linear expression is an expression in which sum of exponents of variables is at most 1 in each of its terms.

Option a: [tex]3x - 2[/tex]

Here, the exponent of the variable is 1.

So, it is a linear expression.

Option b: [tex]-9y[/tex]

Here, the exponent of the variable is 1.

So, it is a linear expression.

Option c: [tex]-7x^2 + 4x[/tex]

Here, the highest exponent of the variable is 2.

So, it is NOT a linear expression.

Option d: [tex]-\frac{1}{2} x^2[/tex]

Here, the exponent of the variable is 2.

So, it is NOT a linear expression.

Option e: [tex]8xy[/tex]

Here, sum of exponents of variables is 2.

So, it is NOT a linear expression.

Hence, c, d and e are NOT algebraic expressions.

Answer:

Two numbers are called additive inverses if their sum is 0. Another one is two numbers are called multiplicative inverses if their products is 1, if their product is 1. ... Two numbers are additive inverses if their sum is 0. If they add up to 0.

Step-by-step explanation:

Answer:

7.141

.133

9.902

Step-by-step explanation:

give me brainliest please! :) also, hope it helps have a great day

Answer:

yeah I'm sorry good luck with this

Step-by-step explanation:

Answer:

c

i. pretty sure the answer is c

Step-by-step explanation:

9.60x15percent gives you $1.44- 9.60= 8.16

[tex]3 \sqrt{7} \times 17 \sqrt{14} [/tex]

This is the problem that we need to solve. The best way to get about it is to first:

The skills needed are multiplication, mulitplication of radicals, and simplifying radicals, so if you want to review anything use these as reference.

Hope you understood and have a nice day!!

Answer:

senior citizen cost $4

children cost $7

Step-by-step explanation:

The question is not complete

Brenda's school is selling tickets to a spring musical. On the first day of ticket sales the school sold 3 senior citizen tickets and 9 child ... The school took in $67.00 on the second day by selling 8 senior citizen tickets and 5 child tickets. What is the price each of one senior citizen ticket and one child ticket?

Given data

let senior citizens be x

and children be y

so

3x+9y= 75--------------1

on the second day

8x+5y= 67------------2

solve 1 and 2 above

3x+9y= 75     X8

8x+5y= 67      X3

 24x+72y=600

-24x+15y=201

   0x+57y= 399

divide both sides by 57

y= 399/57

y= $7

put y= 7 in eqn 1 above

3x+9*7= 75

3x+63= 75

3x=75-63

3x=12

x= 12/3

x= $4

Answer:

1.82

Step-by-step explanation:

Add the prices to get the subtotal:

Sweet Tea:

2.49 * 2 = 4.98

4.98 + 15.99 + 4.99 = $25.96

The subtotal is $25.96

The sale's tax in Miami is 7% (the base 6% for FL, and the extra 1% for Miami).

$25.96 * 0.07 = 1.817 ≈ 1.82

The tax should be 1.82.

Hope this helps.

Answer:

x<56

Step-by-step explanation:

Since the dot over 56 isn't filled in, the inequality doesn't include 56 (so we'll use < or > not [tex]\leq[/tex] or [tex]\geq[/tex])

Now, let's look at the direction of the shading: is it going to the left of 56 or to the right?

This shading is to the left of 56, which indicates that it's all of the numbers less than 56.

As said above, the inequality doesn't include 56

therefore, it will be x<56 (x is less than 56, and 56 is not included)

hope this helps!

Answer:

x<56

Step-by-step explanation:

First off look at the number the dot is on.

Its at 56.

So next we see if the dot is filled in or not.

If the dot is filled in, then its either less than equal to or greater than equal to

If the dot is empty, then its less than or greater than

The dot is not filled in

So next see which way the line is going

The line is going left, which means that the number is getting smaller

Make the equation

start with x

x

The sign will be < because x has to be less than 56.

x < 56

An easy trick to remember which way the sign goes in these types of questions [not in all cases though] is look which way the line is going.

Think of the signs as arrows

If you have < then the line goes <-- left

If you have > then the line goes --> right

If you need further assistance, don't be afraid to reach out. I hope this helps!

Answer:

11

Step-by-step explanation:

11 fred

6 louis

18 tom

please mark me as brainliest!!<3

Answer:

Fred Painted 11 chairs. B

Step-by-step explanation:

Let Tom = T

Let Louis = L

Let Fred = F

Formulas

T = 3*L

F = L + 5

T + L + F = 35             Subtitute for Fred and Tom

Solution

3*L + L + L+5 = 35      Combine like terms

5L + 5 = 35                 Subtract 3 from both sides

5L = 35 - 5

5L = 30                       Divide by 5

L = 30/5  

L = 6

Fred Painted 5 more than Louis.

That makes Fred = 11

Answer:

k ≥ 4  or k ≤ -3

Step-by-step explanation:

Given function;

[tex]\frac{k}{4} \geq 1 \ \ or \ \frac{k}{3} \leq -1 \\\\Simplify \ the \ function \ as \ follows;\\\\k \geq 4 \ or \ k\leq -3\\\\[/tex]

Check the image uploaded for additional solution;

Answer:

25000

0.15

−1957.523

Step-by-step explanation:

Given the function :

Vn=250000.85n

Value of car due to Depreciation,

V(n) value of car after n years.

Initial value of car ; value of car at year 0

V(0) = Vn=25000(0.85)^(0)

V(0) = 25000(0.85)^0

V(0) = 25000(1)

V(0) = 25000

The Decay rate = annual Depreciation

According the exponential function.

mb^n

m = initial value

b = 1 - Decay rate

Relating to the equation given :

b = 0.85

0.85 = 1 - Decay rate

Decay rate = 1 - 0.85

Decay rate = 0.15

Value lost in fifth year : V(5) - V(4)

n = 5

V(5) = 25000(0.85)^5

V(5) = 25000 * 0.4437053125

V(5) = 11092.6328125

V(4) = 25000(0.85)^4 = 13050.15625

11092.6328125 - 13050.15625

= −1957.523

Answer:

3/4 * 2/5

Step-by-step explanation:

Areas is L * W

(1/5 + 1/5) * (1/4 + 1/4 + 1/4) = 2/5 * 3/4

Answer:

3/10

Step-by-step explanation:

The area will be the length of the striped rectangle multiplied by the width of the striped rectangle.

The length will be 1/4 + 1/4 + 1/4 = 3/4 and the width will be 1/5 + 1/5 = 2/5.

Now just multiply 3/4 by 2/5 and you'll get 6/20 which in its simplest form is 3/10.

Answer:

-80 ; 2 ; - 15 ; - 15

Step-by-step explanation:

Given that:

1.)

A withdrawal of $80, will cause reduction in the initial value, hence, negative

= - 80

2.)

A 2 - inch rise in water level, indicates increase from initial level, hence, positive

= + 2

3.)

A lose of 15 pounds indicates reduction in weight, hence, negative

= - 15

4.)

Draining 15 gallons of water from a fish tank indicates reduction Hence, negative

= - 15

Step-by-step explanation:

First simplify it.  Combine like terms.

0.2 - 2m = 2.1m + 2.5 - 1.8m

0.2 - 2m = 0.3m + 2.5

Then isolate m.  Add 2m on both sides, then subtract 2.5 from both sides.

0.2 - 2m = 0.3m + 2.5

        0.2 = 2.3m + 2.5

       -2.3 = 2.3m

Now divide by 2.3 to find m.

       -2.3 = 2.3m

           -1 = m

And so m = -1.

Answer:

$9.30.

Step-by-step explanation:

$130.20 / 14 = 9.3

Answer:

I believe it is y=7.45x

Step-by-step explanation:

Right so: each lunch box costs $7.45 as you bought 10 which costs $74.50

So if Y is the total cost and X is the number of boxes

it should be

y=7.45

as each box is $7.45 and you want how much all the boxes cost

Answer:

Please check the explanation.

Step-by-step explanation:

Part a)

Given

It is clear that m∠ABD and m∠CBD lie on a straight line.

Thus, the sum of m∠ABD and m∠CBD will be 180°.

Hence,

m∠ABD and m∠CBD are supplementary angles.

Part b)

As m∠ABD and m∠CBD are supplementary angles, so the sum of m∠ABD and m∠CBD will be 180°.

Thus,

m∠ABD + m∠CBD = 180°

substitute m∠ABD = (7q-46)° and m∠CBD = (3q + 6)°

(7q-46)° + (3q + 6)° =  180°

Part c)

Given the equation

(7q-46)° + (3q + 6)° =  180°

Combining the like terms

7q + 3q - 46 + 6 = 180

10q - 40 = 180

10q = 180 + 40

10q = 220

divide both sides by 10

10q/10 = 220/10

q = 22

Therefore, the value of q = 22

Part d)

As

m∠ABD = (7q-46)°

substituting q = 22

m∠ABD = 7(22) - 46

             = 154 - 46

             = 108°

also

m∠CBD = (3q + 6)°

substituting q = 22

m∠CBD = 3(22) + 6

              = 66+6

              = 72°

Therefore,

Answer:

D.) Every cloud has a silver lining!

Step-by-step explanation:

Hope this helps!

Answer:

c

Step-by-step explanation: use a calculator

The answer is A. Both equations add up to 88.

Answer:

x-intercept: (-7/4, 0)

y-intercept: (0, 7)

Step-by-step explanation:

i hope this helps :))