If 3m = 19 - n and 2m + 5n = 30, then what is the value of m?
Answers
Answer:
m=5
Step-by-step explanation:
We can solve this by using a system of equations. The easiest way to solve this is by using substitution.
3m=19-n Subtract both sides by 19 to find n.
-19 -19
3m-19=-n Divide everything by -1 to make n positive.
/-1 /-1
n=-3m+19
Now, we can substitute n into the second equation.
2m+5(-3m+19)=30 Substitute (-3m+19) into n.
2m-15m+95=30 Simplify.
-13m+95=30 Simplify and subtract both sides by 95.
-95 -95
-13m=-65 Divide both sides by -13.
/-13 /-13
m=5
We don't need to solve for n at all, so that is the answer!
Hope this helps, and have an amazing day ♥
Related Questions
erics cell phone service costs $40.00 a month for unlimited calls. he also pays $0.02 for each text message he sends. what equation represents the total cost, c, in dollars, for when eric sends t text message
Answers
Answer:
40.021
Step-by-step explanation:
Unlimited calls = $40
Text message = $0.021
NOTE:There is a difference between the value you gave for cost of text messages in the question and the values given in the group of answers. I will use $0.021 for cost of text messages since it is common to all answer choices.
Total cost = Cost of unlimited calls + cost of text messages
C = $40 + $0.021
= $40.021
Therefore, the equation which represent the total cost in dollars for a month is 40.021
A. 40.021
Answer:
maluna1999live is correct the answer is 40.021 so if your going to give someone the brailest then it should be maluna1999live
Step-by-step explanation:
solve the equation 4x^3 + 32x^2 + 42x - 16 = 0, given that one root is equal to the sum of the other two roots
Answers
The solutions to the equation are x = -1, x = -8, and x = 1/2.
How to calculate the valueThe equation 4x³ + 32x² + 42x - 16 = 0 can be divided throuh by 2 as follows:
2x³ + 16x² + 21x - 8 = 0
We can test each of these possible roots by substituting them into the equation and seeing if we get 0. When we substitute -1, we get 0, so -1 is a root of the equation. We can then factor out (x + 1) from the equation to get:
(x + 1)(2x² + 15x - 8) = 0
We can then factor the quadratic 2x² + 15x - 8 by grouping to get:
(x + 8)(2x - 1) = 0
This gives us two more roots, x = -8 and x = 1/2.
Therefore, the solutions to the equation are x = -1, x = -8, and x = 1/2.
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What’s 3/4s of 300 million
Answers
Answer:
225000000
Step-by-step explanation:
(1/4)^-3/2. The topic is indices.
Answers
Answer:
8
Step-by-step explanation:
The minus turns the base upside down
(1/4)^-3/2 = 4^(3/2)
The square root of 4 is 2
2^3 = 8
So the answer is 8.
Posting this here because why not, it's not like anybody will do it.
Answers
Answer:
1. 264
2. degree: 6, term: 3xy^5
3. -60x^3-2x^2+9x
4. 6mn^3-4m
5. 8x^3-4x+2
6. -x^2-6x-13
Step-by-step explanation:
What is the shortest path that will visit point A, B, C, and D?
https://dw6y82u65ww8h.cloudfront.net/organisations/328/94ce962c-bb45-4cbb-8c4a-2b1e1ed75681/img_quad_vertexedge_d.gif
link to graph
A to D to C to B
C to B to D to A
B to A to D to C
A to B to C to D
Answers
Answer:
A to D to C to B
Step-by-step explanation:
A to D to C to B only takes 10.5. Everything else takes a longer distance.
The volume of this cube is 64 cubic feet. What is the value of a?
Answers
a = 4
Step-by-step explanation:
Volume = l • w • h
Basically a number multiplied by itself 3 times that will give 64 (since the shape is a cube and all sides are equivalent)
a = 4
Juan wants to buy a guitar. The regular price of the guitar is $329.99. The sales price of the guitar is 25% off of the regular price. Juan most Pat 7.25% sales tax in addition to the sales price of the guitar. What is the total amount Juan must pay for the guitar?
Answers
The supplied document states that Juan must pay $265.32 in total for the instrument.
By sales, what do you mean?Any transaction in which goods or services are exchanged for cash is referred to as a sale. In other words, a transaction is any activity that involves transferring ownership of a good or service to the buyer in exchange for cash.
The instrument costs $329.99 at standard pricing.
$329 * 25% = $82.50
The guitar's discount price is thus $329.99 less $82.50, or $247.49.
7.25% of the purchase price is used to compute sales tax.
Therefore, $247.49 * 7.25% = $17.83
As a result, we eventually tack on the taxation to the purchase price to determine Juan's final obligation to pay for the guitar.
$247.49 + $17.83 = $265.32
The total price that Juan shall pay for something like the guitar is thus $265.32.
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FREE MAKE UP TUTORIAL
COME FAST https://smart.newrow.com/room/nr2/?room_id=pbw-045&firstRun
Answers
Answer:
girl how come you didn't come on Friday are you coming today???
Step-by-step explanation:
2t/3=-10
Help!! For today
Answers
Answer:
t=15
Step-by-step explanation:
-10 times 3 =-30
2t=-30
-30 divided by 2= 15
t=15
hope this helps you :))
Damian was out at a restaurant for dinner when the bill came. His dinner came to $26. He wanted to leave a 31% tip. How much was his meal plus the tip, before tax, in dollars and cents?
Answers
Answer:
34 dollars and 6 cents
Step-by-step explanation:
1 percent = 0.26
0.26 x 31 = 8.06
26 + 8.06 = 34 dollars and 6 cents
I believe it is 34.06
What is the measure of an angle that is the complement of angle K?
Answers
Answer:
85
Step-by-step explanation:
Complement = 90
Since 5 is given:
90 - 5 = 85
CAN SOMEONE PLEASE HELP !!! ASAP
Answers
hello hello I am working for a company in North London with this machine and have 5.30am with this machine and it has been a few months now since yesterday and I have not received the refund so can I get in touch as I have not been able for any further action on this machine and I have not received the refund or refund the money back
THIS ONE IS HARD SO PLEASE HELP ITS RSM....
AWNSER FOR EACH ONE (I WILL GIVE BRAINLIEST)
Y>0
Y<0
Y=0
Answers
The value of x when y=0 from the given absolute value equation is x=-1.
The graph for the absolute equation y=|x+2|-1 is given.
Rewrite in vertex form and use this form to find the vertex (h,k).
(-2, -1)
To find the x-intercept, substitute in 0 for y and solve for x. To find the y-intercept, substitute in 0 for x and solve for y.
x-intercept(s): (-1,0),(-3,0)
y-intercept(s): (0, 1)
Here, y>0
So, 1=|x+2|-1
2=x+2
x=0
When y<0
So, -1=|x+2|-1
x+2=0
x=-1
When y=0
0=|x+2|-1
1=x+2
x=-1
Therefore, the value of x when y=0 from the given absolute value equation is x=-1.
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{[(3x+8)+6(2.5x-3)]}
Answers
Answer: The answer is 18x + 26
Step-by-step explanation:
What I did was simplify the Expression of (3x+8)+6(2.5x-3) then combine the terms and last evaluate the Expression.
Identify the possible solution fo
3x - 10 <11
Answers
Which of the following is NOT TRUE about the transformation given below?
y=-2e^(x-3)+4
Group of answer choices
Up 4 units
Vertical shrink by 2
Reflection across x-axis
Right 3 units
Answers
Answer:
Vertical shrink by 2
Step-by-step explanation:
Multiplying by 2 stretches the function. It does not shrink it.
Answer: Vertical shrink by 2
4. The base of the rectangular prism is shaded. What is the lateral surface
area? *
4.5 ft
3 ft
11 ft
Answers
Answer:
Step-by-step explanation:
33 ft
make me brainliest
2. Determine which of the given signals are periodic: (i) \( x[n]=\cos (\pi n) \) (ii) \( x[n]=\cos (3 \pi n / 2+\pi) \) (iii) \( x[n]=\sin (3.15 n) \) (iv) \( x[n]=1+\cos (\pi n / 2) \) (v) \( x[n]=e
Answers
The signal \(x[n] = \cos (\pi n)\) is periodic because it is a discrete-time cosine function with a frequency of \(\pi\) and an integer period of 2. Therefore, it repeats every 2 samples. the signals (i) and (iv) are periodic with periods of 2 and 4, respectively, while the signals (ii), (iii), and (v) are not periodic.
A periodic signal repeats itself after a certain interval called the period. To determine if a signal is periodic, we need to check if there exists a positive integer \(N\) such that \(x[n] = x[n + N]\) for all values of \(n\). Let's analyze each signal:
(i) \(x[n] = \cos (\pi n)\):
The cosine function has a period of \(2\pi\). In this case, the argument of the cosine function is \(\pi n\). Since \(\pi\) is irrational, the cosine function will not repeat itself exactly after any integer \(N\). However, if we consider \(N = 2\), we have:
\(x[n] = \cos (\pi n) = \cos (\pi (n + 2)) = \cos (\pi n + 2\pi) = \cos (\pi n)\)
Therefore, \(x[n]\) is periodic with a period of 2.
(ii) \(x[n] = \cos \left(\frac{3\pi n}{2} + \pi\)\):
The argument of the cosine function is \(\frac{3\pi n}{2} + \pi\). This function has a period of \(\frac{4}{3}\pi\) since \(\frac{3\pi}{2}\) is the coefficient of \(n\) and the \(+\pi\) term shifts the function by \(\pi\) units. Since \(\frac{4}{3}\pi\) is not an integer multiple of \(\pi\), the signal is not periodic.
(iii) \(x[n] = \sin (3.15 n)\):
The sine function has a period of \(2\pi\). In this case, the argument of the sine function is \(3.15 n\). Since \(3.15\) is irrational, the sine function will not repeat itself exactly after any integer \(N\). Therefore, the signal is not periodic.
(iv) \(x[n] = 1 + \cos \left(\frac{\pi n}{2}\right)\):
The cosine function in this signal has a period of \(4\) since the coefficient of \(n\) is \(\frac{\pi}{2}\). Adding 1 to the cosine function does not affect its period. Therefore, the signal is periodic with a period of 4.
(v) \(x[n] = e\):
The signal \(x[n] = e\) is a constant signal and is not dependent on \(n\). A constant signal is not periodic since it does not exhibit any repetitive pattern.
In summary, the signals (i) and (iv) are periodic with periods of 2 and 4, respectively, while the signals (ii), (iii), and (v) are not periodic.
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the following table shows the probability distribution for the number of books a student typically buys at the annual book fair held at an elementary school. number of books 0 1 2 3 4 5 6 7 probability 0.35 0.20 0.15 0.10 0.07 0.08 0.04 0.01 let the random variable bb represent the number of books a student buys at the next book fair. what is the expected value of bb ?
Answers
Expected value of bb = 1.79
What is expectation?
At first it is important to know about probability of an event.
Probability gives us the information about how likely an event is going to occur
Probability is calculated by Number of favourable outcomes divided by the total number of outcomes.
Probability of any event is greater than or equal to zero and less than or equal to 1.
Probability of sure event is 1 and probability of unsure event is 0.
Suppose x is a random variable with the probability function f(x). suppose
\(x_1, x _2, ..., x _ n\) are the values corrosponding to the actual occurance of the event and \(p_1, p_2, ... , p_n\) be the corrosponding probabilities.
Expectation is given by the formula =
\(p_1x_1 + p_2x_2 +....+ p_nx _n\)
Expected value of bb =
0.35 ˣ 0 + 0.20 ˣ 1 + 0.15 ˣ 2 + 0.10 ˣ 3 + 0.07 ˣ 4 + 0.08 ˣ 5 + 0.04 ˣ 6 + 0.01 ˣ 7
0 + 0.20 + 0.30 + 0.30 + 0.28 + 0.40 + 0.24 + 0.07
= 1.79
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Vance used the associative property to find the equivalent expression of (4.5 m + StartFraction 7 Over 8 EndFraction) minus 9. His work is shown below.
(4.5 m + StartFraction 7 Over 8 EndFraction) minus 9
Did Vance apply the associative property correctly? Why or why not?
Yes, the terms with variables should be written first.
Yes, the terms can be regrouped and still be equivalent.
No, the order of the terms should have been changed.
No, the addition symbol was dropped in the second expression.
Answers
Answer:
C
Step-by-step explanation:
Answer:
C: Yes, the terms can be regrouped and still be equivalent.
Step-by-step explanation:
Most terms can be regrouped and still be equivalent.
Solve for x.
(13x-32)
S
T
V
(7x + 22)°
U
Answers
Answer:
x=9
Step-by-step explanation:
13x-32 and 7x+22 are equal to each other (angles) so
13x-32=7x+22
13x-7x=22+32
6x=54
x=54/6
x=9
Can anyone help me with this
Answers
Answer:
option A is the correct answer
Step-by-step explanation:
hope it's helpful
Please help I am stuck on this question
You have 2 different savings accounts. For Account A, the simple interest earned after 21 months is $11.55. For Account B, the simple interest earned after 15 months is $12.00. If the interest rate is 3.3% for Account A and 2.4% for Account B, how much is the principal in each account? Which account earned you the most interest the first month? Explain your answer.
Answers
Answer:
PRINCPAL = A 3.33 B 4.76
Account B had earned more interest month 1 = $0.80
Step-by-step explanation:
LCM of 21 and 15 = 105
Account A. = 21 months is $11.55 interest
Account B = 15 months is $12.00 interest
Account A = given 3.3% = 11.55 / 0.033 = 350 then 350/105 = 3.3333 = 3.33
Account B = given 2.4% = 12/ 0.024 = 500 then 500/105 = 4.76109 = 4.76
FIRST MONTH = 1 PART WORKINGS
Account A = 11,55/ 21 = $0.55
Account B = 12/15 = $0.80
Simplify the expression.
6(z + 4) + 1 =
Answers
Answer:
6z+25
Step-by-step explanation:
6(z+4)+1
=6z+24+1
=6z+25
Answer: 4+2
Step-by-step explanation:
z=1
6(4+1=5)+1=6
a poll showed that 53.6% of americans say they believe that some psychics can help solve murder cases. what is the probability of randomly selecting someone who does not believe that some psychics can help solve murder cases.
Answers
The probability of randomly selecting someone who does not believe that some psychics can help solve murder cases is 46.4%. Hence, the answer is 46.4%.
Given the poll showed that 53.6% of Americans say they believe that some psychics can help solve murder cases.
We are to find the probability of randomly selecting someone who does not believe that some psychics can help solve murder cases.
Let us consider the following events:
Let A be the event that someone believes that some psychics can help solve murder cases and B be the event that someone does not believe that some psychics can help solve murder cases.
Then A and B are complementary events, that is A∩B=∅ (i.e., the events cannot happen at the same time) and A∪B = S (the event space).
Thus we can write P(A) = 53.6% and P(B) = 100% - 53.6% = 46.4%.
Therefore, the probability of randomly selecting someone who does not believe that some psychics can help solve murder cases is 46.4%. Hence, the answer is 46.4%.
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Help me pls help thank you soo much :)
Answers
Answer:
Don't sweat it the answer should be C
Step-by-step explanation:
Hope I helped you
The number of people taking online classes steadily increased at a rate of 205 per semester since 2019. You record the number of online students in 2020 to be 36,025. If you let 2019 be year zero, then write a function that represents the number of people taking online classes as a function of number of years. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a. f(x) = 205x + 35820 b. f(x) = 205 +x c. f(x) = 205x+175.73
d. f(x)=35820x+205
Answers
The correct answer is a. f(x) = 205x + 36,025.The function that represents the number of people taking online classes as a function of the number of years.
We know that the number of people taking online classes steadily increased at a rate of 205 per semester since 2019. We also know that in the year 2020 (which is 1 year after 2019), the number of online students was recorded as 36,025.
Let's denote the number of years since 2019 as x. The function that represents the number of people taking online classes as a function of the number of years can be written as:
f(x) = 205x + 36,025.
In this function, the coefficient of x (205) represents the rate of increase in the number of online students per year, and the constant term (36,025) represents the initial number of online students in the year 2020.
Therefore, the correct answer is a. f(x) = 205x + 36,025.
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if its assumptions are met, the analysis of variance technique is appropriate when ____.
Answers
Answer:
comparing the means of three or more groups
Step-by-step explanation:
1. Compare the statement using >, <, or =
-|-5| |-10|
Answers
Answer:
1st one, A
Step-by-step explanation: