Mathematics College

Demarcus and Devon were working on this problem:
A phone costs $300. The price will increase by 15%
next week.
Devon thinks the new price of the phone will be $315.
Demarcus thinks it will be $345. Who is right?

Answers

Answer 1

Answer:

Demarcus is right the phone will cost $345

Step-by-step explanation:

15% of 300 = 45

300+45=345

Related Questions

(b) At Smith's Bike Rentals, it costs $26 to rent a bike for 6 hours.
How many hours of bike use does a customer get per dollar?

Answers

About 4.33 dollars, you divide 26/6 and it’s 4.33

A rectangular plot of farmland will be bounded on one side by a river and on the other three sides by a single-strand electric fence. With 1500 m of wire at your disposal, what is the largest area you can enclose, and what are its dimensions

Answers

Step-by-step explanation:

Let x be the length and y be the width of the rectangular plot.

The plot is bounded on one side by a river and on the other three sides by a single-strand electric fence. It means,

x+2y = 1500

x = 1500 - 2y ....(1)

We know that the area of a rectangular plot is given by :

A = xy ....(2)

Put the value of x from equation (1) in (2)

[tex]A=(1500-2y)y\\\\A=1500y-2y^2[/tex] .....(3)

For largest area, differentiate above area equation wrt y.

[tex]\dfrac{dA}{dy}=\dfrac{d}{dy}(1500y-2y^2)\\\\=1500-4y\\\\\text{Put}\ \dfrac{dA}{dy}=0\\\\1500-4y=0\\\\y=\dfrac{1500}{4}\\\\=375[/tex]

Put the value of y in equation (1).

x = 1500-2(375)

= 750 m

Put the value of y in equation (3).

[tex]A =1500(375)-2(375)^2\\A=281250\ m^2[/tex]

Hence, the largest area is 281250 m² and its dimensions are 750 m and 375 m.

Triangle DEFDEFD, E, F is similar to triangle PQRPQRP, Q, R. Solve for k.

Answers

you were not him in a relationship that link was with a 1 minute

PLZZZZ Hurry I’m in a rush

Answers

Answer:

y=10

Step-by-step explanation:

2y+3+9y-7+7y+4=180

18y=180

y=10

1/3(9x +45) - x = 6x +4

Answers

1/3(9x+45)-x=6x+4

we can move the numbers on the right and the x's on the left

9x/3+45/3-x=6x+4

3x-x-6x=4-15

-4x=-11

x=11/4

Answer:

x = 11/4

Step-by-step explanation:

thats the answer...........................

The two-way table shows the ages of the players on different sOCcer teams.
Team D
3
Total
21
23
14
58
Team C
Team A
4
Team B
8 Years Old
9 Years Old
10 Years Old
Total
4
3
13
3
5
16
4
15
14
Which statement is true?
O The probability that a randomly selected player on TeamA is 8 years old is
O The probability that a randomly selected 8-year-old player is on Team C is
O The probabilíty that a randomly selected player on Team C is 10 years old is
O The probability that a randomly selected 10-year-old player is on Team B is 13
58

Answers

**Answer**
The true statement is: The probability that a randomly selected player on Team C is 10 years old is 5/16

please mark me brainliest, happy holidays :)

What is the following product ? Assume y >= 0 3sqrt(10) * (y ^ 2 * sqrt(4) + sqrt(8y))

Answers

Answer:a

Step-by-step explanation:

Answer:

A on Edgen

Step-by-step explanation:

Correct

Alaina is making a birdseed mix with 2 1/3 lb sunflower seeds, 5/6 lb cracked corn, and 1/6 lb peanuts. How much cracked corn does Alaina need to make 5 lb of birdseed mix? Show your work.

Answers

Answer:

2 1/3+5/6+1/6= 3 1/2

Step-by-step explanation:

Change your denominator to 6 and add then reduce if possible

plz help me out if you can​

Answers

Answer:

D $26

Step-by-step explanation:

a painter painted 3/5 of a portrait in 20 minutes. If she continues working at the same rate, how many portraits will she paint in one hour?

Answers

Answer:

one and four fifths 1 4/5-

Step-by-step explanation:

What is the value of x in the equation 2 (6 x + 4) minus 6 + 2 x = 3 (4 x + 3) + 1?
1
3
4
6

Answers

Answer:

x=4

Step-by-step explanation:

I did the edge quiz pretty sure I got it correct

Answer:

x=4

Step-by-step explanation:

find the number of each kind of atom
2MgO​

Answers

2Mg+O squared→2MgO ((when I say squared it means u need to put that little 2 underneath the O if ur still confused I can help u a little more :)

Pete has 4 packs of gum balls. Each pack has 5 gum balls. If Pete gives the same number of gum balls to 6 friends, how many gum balls will each friend get?
2
3
4
5

Answers

Answer:

I would say 3

Step-by-step explanation:

Can someone help me so stressed

29 points
Thanks

Answers

Answer:a square

Step-by-step explanation:a square

For each incorrect answer on a test, the teacher changes the total points possible by −4 points. The total number of points possible on a test is 64. If a student has 9 incorrect answers, what will be that student’s score?

Answers

Answer:

-4×9=-36

then 64-36=28

Enter the simplified form of the complex fraction in the box.

Assume no denominator equals zero.

Answers

Answer: this is the answer

x^2+11x+6/(x+2)(x+5)

Step-by-step explanation:

Answer:

Here is the complete answer key with all correct and incorrect choices shown including this question. Good luck future users.

evaluate - 31 - 8 + 31

Answers

Answer:

-8

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Step-by-step explanation:

Step 1: Define

-31 - 8 + 31

Step 2: Evaluate

Subtract:                    -39 + 31Add:                           -8

The difference between two numbers is 8. Twice the number is 4 more than the larger number. What is the smaller number?

Answers

Answer:

If the two numbers are x and y, then:

x + y = 8

18 - 2x = 4y - 2.

When we subtract y from both sides in our first equation we get:

x = 8 - y, so:

18 - 2(8 - y) = 4y - 2

18 - 16 + 2y = 4y - 2

2 + 2y = 4y - 2

2y = 4

y = 2

Since x + y = 8, and y = 2, x = 6, and since 6 > 2, the larger number is 6.

4x2
4x + 10 and 2x2 + 5x – 8.

Answers

Answer:

14x , -4+5x

I hope this helps

have a fantastic day

In ΔHIJ, h = 40 cm, ∠J=20° and ∠H=93°. Find the length of j, to the nearest centimeter.

Answers

Given:

In ΔHIJ, h = 40 cm, ∠J=20° and ∠H=93°.

To find:

The length of j, to the nearest centimeter.

Solution:

According to Law of sine,

[tex]\dfrac{a}{\sin A}=\dfrac{b}{\sin B}=\dfrac{c}{\sin C}[/tex]

In ΔHIJ, using law of sine, we get

[tex]\dfrac{j}{\sin J}=\dfrac{h}{\sin H}[/tex]

[tex]\dfrac{j}{\sin (20^\circ)}=\dfrac{40}{\sin (93^\circ)}}[/tex]

[tex]j=\dfrac{40\times \sin (20^\circ)}{\sin (93^\circ)}}[/tex]

On further simplification, we get

[tex]j=\dfrac{40\times 0.34202}{0.99863}[/tex]

[tex]j=\dfrac{13.6808}{0.99863}[/tex]

[tex]j=13.69958[/tex]

Approximate the value to the nearest centimeter.

[tex]j\approx 14[/tex]

Therefore, the length of j is 14 cm.

I will give Brainliest!! Please answer the question by simplifying!! Thanks so much and stay safe!!

Answers

Distribute 5/7 through the parentheses and add like terms after.

Answer: 11/7x + 11/35y

HELP ME ON THIS. 10 POINTS

Answers

Answer:

This is sooo easy

Step-by-step explanation:

The answer is B

because It does not go through the Origin

every time they ask if something is proportional

ALWAYS check if its a straight line or if  it go through the origin

hope I helped sorry If you get it wrong

Jacob is 4 feet 5 inches tall. How tall is Jacob in inches?
O 48 inches
09 inches
020 inches
0 53 inches

Answers

Answer:

He is 53 inches in height

Step-by-step explanation:

4 × 12 inches = 48 + 5 = 53

why do do we need it

Answers

Answer:

why do we need what?

Step-by-step explanation:

Because

Because

Because.

what is two cubed and then divided by 4?

Answers

Two cubed = 2^3
2 * 2 * 2 = 4 * 2 = 8
8/4 = 2
The answer is 2

Answer:

2

Step-by-step explanation:

2 cubed is 8, then divided by 4 is 2

Perform the operation. (-9x^2-2x)-(-9x^2-3x)

Answers

Answer:

(-9x^2-2x)-(-9x^2-3x)

Step-by-step explanation:

-9x^2 + 9x^2 - 2x + 3x

= 0x^2 + 1x

= 1x

Mark me as brainliest

Hope this helps!!!

The formula for temperature conversion is F=1.8C+32. If the Fahrenhei
temperature (F) is 86, What is the Celsius (C) temperature?

Answers

Answer:

30

Step-by-step explanation:

(86-32)/1.8 =30

30 is the answer for Celcius

Order of Operations with and without variables

Answers

Answer:

9

Step-by-step explanation:

3 (2²) - 2(2) + 1 =

3 (4) - 4 + 1       =

12 - 4 + 1           =

8 + 1                 = 9

If a tree casts a 45-foot shadow at the same time that a 6-foot tall man casts a 7.5-foot shadow, find the height of the tree.

1 ft

36 ft

45 ft

56.25 ft

Answers

Answer:

36 feet

Step-by-step explanation:

I believe this is the answer

IS THIS CORRECT OR NAH

Answers

Answer:

yes

Step-by-step explanation:

Answer:

yes

Step-by-step explanation:

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