MATHEMATICS MIDDLE SCHOOL

A manager is comparing the cost of buying baseball caps from two different companies.- Company X charges a $50 fee plus $7 per baseball cap.

- Company Y charges a $30 fee plus $9 per baseball cap.

For what number of baseball caps will the cost be the same at both companies?
A. 20
B. 100
C. 40
D. 10

Answers

Answer 1

Answer:

Answer:

C is the answer

Step-by-step explanation:

Answer 2

Answer: The answer is C because just because

Related Questions

Mr. Conrad's pecan pie recipe calls for 1 3/4 cups of pecans. He plans to make 6 pies for his family reunion. How many cups of pecans will Mr. Conrad need
I need help finding the values
The formula y = 64h gives the velocity v in feet per second of an object that has fallen h feet. Find thevelocity of an object that has fallen 92 feet. Round to the nearest hundredth.
The side of a square is 3n-2r. What is the perimeter? What is the area?
Guy is pouring a new patio for his house. He rents a concrete mixer for $50 per day plus $12.50 per hour. If he is charged $143.75, how long did guy have the concrete mixer?

A convex pentagon has the following measurements for its interior angles: (x-8), (3x-11), (x+8), (x), and (2x+7). Which of the following could be measurements for interior angles of the pentagon? Select all that apply.A: 60

B: 68

C: 76

D: 108

E: 193

F: 540

Answers

Answer: A, B, C, E

Explanation:

The sum of the interior angles of a polygon can be determined by the formula: (n - 2)180 ; where n represents the number of sides. Since a pentagon has 5 sides, then (5 - 2)180 = 540

x - 8

3x - 11

x + 8

2x + 7

8x - 4 = 540

+4 +4

8x = 544

÷8 ÷8

x = 68

**********************

x - 8 ⇒ 68 - 8 = 60 (A)

3x - 11 ⇒ 3(68) - 11 = 193 (E)

x + 8 ⇒ (68) + 8 = 76 (C)

x ⇒ (68) (B)

2x + 7 ⇒ 2(68) + 7 = 143

The sumof the pentagon's interior angles is: 540°

According to the Question, we have: (x-8)+(3x-1)+(x+8)+x+(2x+7)=540

x-8+3x-11+x+8+x+2x+7=540

x+3x+x+x+2x=540+8+11-8-7

8x=544

x=544/8=68

(x-8)=68-8=60 (choose letter A)

(3x-11)=3*68-11=193 (choose letter E)

(x+8)=68+8=76 (choose letter C)

(x)=68 (choose letter B)

(2x+7)=2*68+7=143 (cannot select any letter)

In short, we choose letter A, B, C and E.

The box-and-whisker plot describes the scores of hockey teams in a recent tournament.What was the minimum score? {SIDE NOTE: Answer choices are in the attached photo}

Answers

Your answer is a. 0 :) :) :)

It is A how is this hard.

The current in a stream moves at a speed of 4 mph. A boat travels 5 miles upstream and 13 miles downstream in a total time of 2 hours. What is the speed of the boat in still water?

Answers

I believe it is 4.5mph because traveling upstream and the stream moves at a speed of 4mph would knock off 4 of the original number so if you add 4miles to the given 5 miles you get 9

The same is with the boat going downstream it is adding 4 miles to the original number so you subtract 13 and 4 and you get 9

If it took 2 hours to do that then you divide 9 by 2 and get 4.5

Describe and correct the error(s) made in each of the problems below. 1−x / (5−x)(−x)=x−1 / x(x−5)

5/s+2/5=2/s

Answers

Answer:

$\displaystyle (1-x)/((5-x)(-x)) =-(x-1 )/( x(x-5))$

$\displaystyle (5)/(s)* (2)/(5) =(2)/(s)$

Step-by-step explanation:

Errors in Algebraic Operations

It's usual that students make mistakes when misunderstanding the application of algebra's basic rules. Here we have two of them

When we change the signs of all the terms of a polynomial, the expression must be preceded by a negative sign
When multiplying negative and positive quantities, if the number of negatives is odd, the result is negative. If the number of negatives is even, the result is positive.
Not to confuse product of fractions with the sum of fractions. Rules are quite different

The first expression is

$1-x / (5-x)(-x)=x-1 / x(x-5)$

Let's arrange into format:

$\displaystyle (1-x)/((5-x)(-x)) =(x-1 )/( x(x-5))$

We can clearly see in all of the factors in the expression the signs were changed correctly, but the result should have been preceeded with a negative sign, because it makes 3 (odd number) negatives, resulting in a negative expression. The correct form is

$\displaystyle (1-x)/((5-x)(-x)) =-(x-1 )/( x(x-5))$

Now for the second expression

$5/s+2/5=2/s$

Let's arrange into format

$\displaystyle (5)/(s)+(2)/(5) =(2)/(s)$

It's a clear mistake because it was asssumed a product of fractions instead of a SUM of fractions. If the result was correct, then the expression should have been

$\displaystyle (5)/(s)* (2)/(5) =(2)/(s)$

Jazmin has 5 movies that are dramas, 8 comedy movies, and 11 adventure movies in her movie collection. What is the ratio of adventure movies to the total number of movies in her collection?

Answers

There are numerous important information's already given in the question. Based on those information's the answer to the question can be easily determined.
Number of movies that are drama = 5
Number of comedy movies = 8
Number of adventure movies = 11
Total number of movies that Jazmin has = 5 + 8 + 11
= 24
Then
Ratio of adventure movies to the total number of movies = 11:24
This ratio of 11:24 cannot be simplified further. So this is the answer to the given question. I hope the procedure is clear enough for you to understand.

The total number of movies in Jazmin's collection is:
5+ 8+ 11= 24

11 adventure movies: 24 movies

The ratio of adventure movies to the total number of movies in Jazmin's collection is 11:24~

I need help w this math ASAPTeri lives d miles from school. Joel lives 1 mile more than 3 times the distance from school Teri lives. Joel lives 7 mile from school.

Which equation can Joel use to show an equality between two different ways of expressing the distance he lives from school?
A. 3d + 1 = 7
B. 3d – 1 = 7
C. d/3 + 1 = 7
D. d/3 - 1 = 7