MATHEMATICS MIDDLE SCHOOL

How many sqaure feet of carpet do you need will you need 8 ft

12 ft

2 ft

3 ft

Answers

Answer 1
Answer: 12 ft I had the question the other day on online school :)

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12x-18y=9. Solve for y

Answers

In this equation y would equal 9 but that could be wrong

For 1 month, two doctors in a medical office counted the number of patients they saw each day. The mean and MAD for each doctor were calculated and recorded in a table.What conclusion can be drawn, based upon the value of the means-to-MAD ratio?

Doctor Mean MAD
Hartmann 15.3 0.9
Kim 18.9 1.1

A. Dr. Hartmann saw more patients per day than Dr.Kim did.

B. Dr.Kim saw more patients per day then Dr.Hartmann did.

C. Dr.Kim and Dr.Hartmann saw about the same number of patients per day.

D. No conclusions can be drawn
I think it's B please help!!!

Answers

Im not a 100 percent sure but i think its B 

∠AGB and ∠EGD are _ angles.

Answers

Answer:

vertically opposite angle

Step-by-step explanation:

vertical it is right

Vertical opposite angle

The area is 30 square centimeters and a height with 10 centimeters. What is the length of the base?

Answers

So,

The formula for the area of a rectangle is:
A = l * w

We will consider l to be the height.

Substitute the given values.
30 = 10 * w or 10w

Divide both sides by 10.
3 = w

The length (I would call it the width, since it is shorter) of the rectangle is 3 centimeters.
30/10=3 3 cm is the length.

The equation d= -6t + 10 represents the distance d, in miles, Ralph walks from the library to his house in t hours. His sister, Joan, leaves the library right after Ralph. She rides her bicycle from the library to their house at a constant rate. The equation d = 14t represents Joan's bicycle ride where d, is the distance, in miles, and t is the time, in hours.After how many miles will Joan meet Ralph walking to their house?
A. 2.5 miles
B. 7 miles
C. 18 miles
D. 28 miles

Answers

Answer:

B. 7 miles

General Formulas and Concepts:
Algebra I

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality

Terms/Coefficients

Functions

  • Function Notation

Systems of Linear Equations

  • Solving methods: Substitution/Elimination

Step-by-step explanation:

Step 1: Define

Identify given.

[Ralph's Walking Distance Function]: d = -6t + 10

[Joan's Bicycle Distance Function]: d = 14t

Step 2: Find Meeting Point

To find where Joan and Ralph will meet, we need to find where they intersect. Therefore, we need to find the time which they both meet up at. To do this, we can use the process of substitution to find our value of t:

  1. [Equation 1] Substitute in d:
    \displaystyle\begin{aligned}d = -6t + 10 & \rightarrow 14t = -6t + 10\end{aligned}

From here, we can simply use techniques listed under "Algebra I" to solve for t:

\displaystyle\begin{aligned}14t & = -6t + 10 \n20t & = 10 \nt & = \boxed{ (1)/(2) } \n\end{aligned}

∴ both Joan and Ralph will meet up in half an hour, or 0.5 hours.

Step 3: Find Mileage

To find how many miles they will meet up at, we substitute the number of hours elapsed (found in Step 2) and substitute it into any of the equations given:

\displaystyle\begin{aligned}d & = 14t \n& = 14 \bigg( (1)/(2) \bigg) \n& = \boxed{7} \n\end{aligned}

∴ Joan will meet Ralph after 7 miles.

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Learn more about Algebra I: brainly.com/question/10405469

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Topic: Algebra I

Can someone clarify if i'm right? It says i'm wrong but i'm pretty sure i'm right unless i'm missing something...I did the substitution method, was I meant to do the elimination?
I did the elimination method and it said 4 nickels which in turn gives me 52 pennies.

Answers

There are 32 pennies and 24 nickels in jar

Solution:

Let "n" be the number of nickels

Let "p" be the number of pennies

1 penny = 0.01 dollar

1 nickel = 0.05 dollar

There are 56 coins in the jar in all

Therefore,

number of nickels + number of pennies = 56

n + p = 56 ----------- eqn 1

The total value of coins is $ 1.52

Thus we frame a equation as:

number of nickels x 0.05 + number of pennies x 0.01 = 1.52

n * 0.05 + p * 0.01 = 1.52

0.05n + 0.01p = 1.52 -------- eqn 2

Let us solve eqn 1 and eqn 2

From eqn 1,

n = 56 - p ------ eqn 3

Substitute eqn 3 in eqn 2

0.05(56 - p) + 0.01p = 1.52

2.8 - 0.05p + 0.01p = 1.52

0.04p = 2.8 - 1.52

0.04p = 1.28

Divide both sides by 0.04

p = 32

Substitute p = 32 in eqn 3

n = 56 - 32

n = 24

Thus there are 32 pennies and 24 nickels in jar
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