1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
wel
3 years ago
10

46 POINTS!!!

Mathematics
1 answer:
charle [14.2K]3 years ago
6 0

Answer:

<h2><u>r = -0.4</u></h2>

Step-by-step explanation:  57.7r + 23.23 = 2.57          57.7/57.7  = -20.66/57.7

                                                        - 23.23  - 23.23                      

                                              57.7r = -20.66

You might be interested in
Nate and his friends are building a skateboard ramp for an upcoming contest. The length of the ramp on the blueprint is 7.6 inch
ICE Princess25 [194]

Answer:

30.4 feet.

Step-by-step explanation:

We have been given the length of the ramp on the blueprint is 7.6 inches.  The scale on the blueprint is 1 inch to 4 feet. We are asked to find the actual length of the ramp.

We will use proportions to solve our given problem as:

\frac{\text{Actual length}}{\text{Scale length}}=\frac{4\text{ ft}}{1\text{ inch}}

Now, we will substitute the scale length of ramp in our proportion as:

\frac{\text{Actual length}}{7.6 \text{ Inches}}=\frac{4\text{ ft}}{1\text{ inch}}

\frac{\text{Actual length}}{7.6 \text{ Inches}}\cdot 7.6 \text{ Inches}=\frac{4\text{ ft}}{1\text{ inch}}\cdot 7.6 \text{ Inches}

\text{Actual length}=4\text{ ft}\cdot 7.6

\text{Actual length}=30.4\text{ ft}

Therefore, the actual length of the ramp would be 30.4 feet.

7 0
3 years ago
If $x$, $y$, and $z$ are positive integers such that $6xyz+30xy+21xz+2yz+105x+10y+7z=812$, find $x+y+z$.
harina [27]

Answer:

10

Step-by-step explanation:

When we simplify we get $$z(6xy+21x+2y+7)+30xy+105x+10y=812.$$

Then we continue to factor to get: (z+5)(6xy+21x+2y+7)&=847.

We then see that we can factor (6xy+21x+2y+7) into (z+5)(3x+1)(2y+7)&=847.

we then do the prime factorization of 847, which i think is,  7*11*11. we have to find the numbers that multiply to 847 and then plug them into z+5, 3x=1,2y+7.

It has to be a positive, non-negative integer, right?

We also see that 3x+1=11 so we see that x=10/3 (which wont work).

So 3x+1=7, so x=2.

So 11 has to be in another term. It has to be in 2y+7=11 so y=2

for the last term we get z+5=11 so z=6

2+2+6=10

Hope this helps and if you want please consider giving me brainliest. :)

8 0
3 years ago
Which of the values for x and y make the equation 2x + 3y + 4 = 15 true?
hjlf
X=1, y=3 because 2x1 is 2 and 3x3 is 9, 2 plus 9 equals 11 and 11 plus 4 equals 15
5 0
3 years ago
Read 2 more answers
$456 is divided between the telephone and electricity bills in a ratio of 2 : 1. What amount goes to the telephone bill?
kipiarov [429]
$304 is the answer because 456/3 and then multiply by 2
5 0
2 years ago
A number less than 85 the number has 26 and 6 as factors
Len [333]
A number that is less than 85, the number has 26 and 6 as factors is,  78
7 0
3 years ago
Other questions:
  • Simplified what is 5(x+1)
    5·2 answers
  • (1-4x+y)(-3) distributive property you have to remove the parentheses
    12·1 answer
  • You are eating lunch at Subway and have narrowed your sandwich choices to the items in the table below. You must choose one item
    9·1 answer
  • Find the sum.<br> 19+(-19)
    15·1 answer
  • Are these expressions equivalent 2w + 1t and 2w+ t
    7·1 answer
  • What are the multiples of 1/5
    8·2 answers
  • Solve and show how you did 5 (x-1) + 3 = 13
    15·2 answers
  • Classify the quadrilateral by selecting its most specific name.
    8·1 answer
  • Look at the attachment<br>Simplified it too <br>pls take it seriously ​
    10·1 answer
  • 2. What is the volume of this prism?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!