What’s the equation in point slope form of the line that passes through the point (-1,1) and has a slope of 4 ?
9514 1404 393
Answer:
y -1 = 4(x +1)
Step-by-step explanation:
The point-slope form of the equation of a line with slope m through point (h, k) is ...
y -k = m(x -h)
For m=4 and (h, k) =(-1, 1), the equation is ...
y -1 = 4(x +1)
You have $50 and a $15 gift card to spend online. You purchase a pair of headphones for $34.99 and 8 songs for x dollars each. Use an algebraic expression to find the amount you have left when each song costs $1.10.
Answer:
50 + 15 -34.99 - 8x
65 - 34.99 - 8(1.10)
30.01 - 8.8
$21.21
Step-by-step explanation:
The amount you have left when each song costs $1.10 is $21.21.
What is expression?Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement.
Given:
You have $50 and a $15 gift card to spend online.
Cost of each sing = $1.10
You purchase a pair of headphones for $34.99 and 8 songs for x dollars each,
Calculate the total amount as shown below,
Total cost = cost of headphones + cost of each song × number of songs
Total cost = 34.99 + 1.10 × 8
Total cost = 34.99 + 8.8
Total cost = $43.79
Calculate the remaining cost as shown below,
Remaining cost = $50 + $15 - total cost
Remaining cost = $65 - $43.79
Remaining cost = $21.21
Therefore, the amount you have left when each song costs $1.10 is $21.21.
To know more about the expression:
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A teacher uses $40.00 to pay for s students to ride the bus and receives $1.60 in change. If it cost $1.20 for each student to ride the bus, which statement is true?
Answer:
She helped 32 students
Step-by-step explanation:
1.20s+1.60=40
Help? Please even 100 Point split
Answer: [tex]m - 5.25 = 4.75[/tex]
Step-by-step explanation:
We know Austin and his family go to the Carver Country Fair each year.
We also know Austin spends $5.25 trying to win a giant snake plushie.
He won the plushie, so we deduct $5.25. Our current equation is [tex]m - 5.25[/tex].
After spending $5.25 on a plushie, Austin still has 4.75.
We will now have our equation as [tex]m - 5.25 = 4.75[/tex]
The answer is Option B.
Answer:
[tex]\Large \boxed{\sf m-5.25=4.75}[/tex]
Step-by-step explanation:
Money received from Austin's dad - Money spent in Ring Toss = Money left after win at Ring Toss
Let 'Money received from Austin's dad' be m
Can u show steps to solve
In ΔKLM, k = 890 inches, ∠M=143° and ∠K=34°. Find the length of m, to the nearest 10th of an inch.
Answer: 957.8
Step-by-step explanation:
Which expression is equivalent to 5(x + 7)?
to decrease an amount by 28% , multiply by ????
Click on the point that best represents the location of −√5 on the number line.
Answer:
The dot all the way on the left. The one between 2 and 3 I believe.
Step-by-step explanation:
Answer:
The dot all the way to the left on the negative side.
Step-by-step explanation:
please help me with this will give thanks and brainliest.
Answer:
1.394x10^-9
move the decimal point 9 to the left.
0.000000001394
1)
Which figures appear to be congruent?
[A] 2 and 3
[B] 1 and 4
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[C] 2 and 5
[D] 1, 2, and 4
A
B
Answer:
answer c
Step-by-step explanation: since i helped can i have brainlist please :D
Really expense 22.00 sales tax on 2 jerseys and three pairs of socks and jerseys or cost 6.75 each and the total sales tax was $1.03 in three cents fill in the table with the correct prices
Answer:
Step-by-step explanation:
eally expense 22.00 sales tax on 2 jerseys and three pairs of socks and jerseys or cost 6.75 each and the total sales tax was $1.03 in three cents fill in the table with the correct prices
Pls help urgently extra points and mark brainlist easy reading
Answer:
the act of pointing out faults
Step-by-step explanation:
Answer: The answer is A the act of pointing out faults because it talks about how Anna was Criticism of how the or the author on skate
Step-by-step explanation:
In a lab experiment, the decay of a radioactive isotope is being observed. At the beginning of the first day of the experiment the mass of the substance was 1000 grams and mass was decreasing by 14% per day. Determine the mass of the radioactive sample at the beginning of the 10th day of the experiment. Round to the nearest tenth (if necessary).
Answer:
120.91 grams
Step-by-step explanation:
multiply the initial amount by the percent that will remain to the power of n-1, n being the term number, or how many days that have passed.
f(x)=1000(0.85)^14-1
Assuming that the heights of college women are normally distributed with mean 65 inches and standard deviation 3.5 inches, what percentage of women are shorter than 68.5 inches
Answer: the percentage of women that are shorter than 68.5 inches is 84.1%
Step-by-step explanation:
Given that;
mean μ = 65
standard deviation σ = 3.5
percentage of women are shorter than 68.5 inches = ?
P( x < 68.5 ) = P(( x-μ)/σ)
we substitute
⇒ ( 68.5-65)/3.5)
⇒ P(z < 1)
form standard normal table
P( x < 68.5 ) = P(z < 1) = 0.84134 ≈ 84.1%
Therefore, the percentage of women that are shorter than 68.5 inches is 84.1%
Help plz? I don’t know what to write
Answer:
1. C
2. B
3. A
4. D
Step-by-step explanation:
please help me ill mark brainliest
Answer:
A) 50
Step-by-step explanation:
X = 5
15 * 5 + 75 = 150
150 / 3 = 50
y = 50
If -xy – 5+ y^2+ x^2= 0 and it is known that dy/dx= y-2x/-x+2y, find all
coordinate points on the curve where x = -1 and the line tangent to the
curve is horizontal, or state that no such points exist.
Answer:
There is no point of the form (-1, y) on the curve where the tangent is horizontal
Step-by-step explanation:
Notice that when x = - 1. then dy/dx becomes:
dy/dx= (y+2) / (2y+1)
therefore, to request that the tangent is horizontal we ask for the y values that make dy/dx equal to ZERO:
0 = ( y + 2) / (2 y + 1)
And we obtain y = -2 as the answer.
But if we try the point (-1, -2) in the original equation, we find that it DOESN'T belong to the curve because it doesn't satisfy the equation as shown below:
(-1)^2 + (-2)^2 - (-1)*(-2) - 5 = 1 + 4 + 2 - 5 = 2 (instead of zero)
Then, we conclude that there is no horizontal tangent to the curve for x = -1.
At Pizza Pi, 52% of the pizzas made last week had extra cheese. If 13 pizzas had extra cheese, how many pizzas in all were made last week?
There were _______ pizzas made last week.
Answer:
Im trying to find it too :(
Step-by-step explanation:
5*10^9 divided by 5*10^4
Answer:
100000
Step-by-step explanation:
5 * 10^9 = 5000000000
5 * 10^4 = 50000
5000000000 / 50000 = 100000
Hope this helps!
Substituting the equation x = 2y + 3 into the equation y=-3x - 4 will produce what equation?substituting the equation x equals 2y + 3 into the equation y equals negative 3x - 4 will produce what equation
Substituting the equation x = 2y + 3 into the equation y=-3x - 4 will produce the equation y = -3(2y + 3) - 4
What are linear equations?Linear equations are equations that have constant average rates of change, slope or gradient
How to determine the solution to the system?A system of linear equations is a collection of at least two linear equations.
In this case, the system of equations is given as
x = 2y + 3
y = -3x - 4
Considering the first equation
x = 2y + 3
Considering the second equation
y = -3x - 4
Substitute the first equation in the second equation
y = -3(2y + 3) - 4
Hence, substituting the equation x = 2y + 3 into the equation y=-3x - 4 will produce the equation y = -3(2y + 3) - 4
Read more about system of linear equations at
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During lunch on Friday, 45 students in the 7th
grade chose pizza. This represented 25% of the
seventh-grade class. How many students are in the
entire 7th grade class?
Answer:
135
Step-by-step explanation:
When a number is subtracted from 25, the difference is 8 less than twice
that number. What is the number?
Answer:
11
Step-by-step explanation:
first, we would set up an equation. since they say that a number is subtracted from 25, let x represent that number and say 25-x. on the other side of the equation, since it says the difference would be 8 less than twice that number, we would say 2x-8 because twice x would be 2x and we'd subtract 8 from that.
the equation would look like this:
25-x=2x-8
next, we would solve. first get the x to one side of the equation:
25=3x-8
then, get the 3x by itself:
33=3x
finally, solve for x by dividing both sides of the equation by 3:
11=x
x=11.
The number is 11.
Write an equivalent expression to show the relationship of multiplication and addition 6 + 6 + 6
Answer:
6^3
Step-by-step explanation:
Test - Par Parallel Lines & Transversals
Answer:
N central and Malzahn St are parrallel while the transversal is Brockway Rd
Step-by-step explanation:
Im not a nerd.
You might need:
Calculator, Z table
Yuki and Zana are on a swimming team. They often compete against each other in the 100 meter freestyle
race. Yuki's times in this race are normally distributed with a mean of 80 seconds and a standard deviation
of 4.2 seconds. Zana's times are also normally distributed with a mean of 85 seconds and a standard
deviation of 5.6 seconds. We can assume that their times are independent.
Suppose we choose a random 100 meter freestyle race and calculate the difference between their times.
Find the probability that Yuki's time is faster than Zana's.
You may round your answer to two decimal places.
P (Yuki faster)
Answer:
0.2389 = 23.89% probability that Yuki's time is faster than Zana's.
Step-by-step explanation:
When the distribution is normal, we use the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
Find the probability that Yuki's time is faster than Zana's.
That is, the subtraction of Yuki's time by Zana's time has to be higher than 0.
When we subtract normal distributions, the mean is the subtraction of the means. So
[tex]\mu = 80 - 85 = -5[/tex]
The standard deviation is the square root of the sum of the variances. So
[tex]\sigma = \sqrt{4.2^2+5.6^2} = 7[/tex]
We have to find 1 subtracted by the pvlaue of Z when X = 0. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{0 - (-5)}{7}[/tex]
[tex]Z = 0.71[/tex]
[tex]Z = 0.71[/tex] has a pvalue of 0.7611
1 - 0.7611 = 0.2389
0.2389 = 23.89% probability that Yuki's time is faster than Zana's.
In this exercise we have to use knowledge about probability to calculate the probability of faster time, so we have to:
probability that Yuki's time is faster than Zana's.
When the distribution is normal, we use the z-score formula. In a set with mean and standard deviation , the zscore of a measure X is given by:
[tex]Z=\frac{X-\mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.
Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
Find the probability that Yuki's time is faster than Zana's. That is, the subtraction of Yuki's time by Zana's time has to be higher than 0. When we subtract normal distributions, the mean is the subtraction of the means. So:
[tex]\mu= 80-85=-5[/tex]
The standard deviation is the square root of the sum of the variances. So:
[tex]\sigma= \sqrt{(4.2)^2+(5.6)^2} = 7[/tex]
We have to find 1 subtracted by the p-value of Z when X = 0. So:
[tex]Z= \frac{X-\mu}{\sigma}\\Z= \frac{0-(-5)}{7}\\Z= 0.71[/tex]
Has a p-value of 0.7611:
[tex]1 - 0.7611 = 0.2389[/tex]
See more about probability at brainly.com/question/795909
Complete the table below for the function y= 3x
Answer:
the first one equals 3 the second one is 6 and the third one is 9
Step-by-step explanation:
Answer:
:D
Step-by-step explanation:
thx i needed this answer
2) y = 3.x – 5; Find y if x = 8
Answer:
y=19
Step-by-step explanation:
y=3(8)-5
y=19
Answer:
Y=19
Step-by-step explanation:
So step one, fill in x and multiply
y=24-5
subtract
y=19
Need help urgently extra points and mark brainlist
Answer:
-5 or 5 i think
Step-by-step explanation:
Answer:
D. btw plzzzzz give me brainliest
Help Please I need help
Answer:
Here's your answer
Step-by-step explanation:
The answer would be a square and a rectangle.