Answer:
y = 6
Step-by-step explanation:
-2y = 4x – 4
y = -2x + 2
7x = -4(-2x+2) + 10
7x = 8x-8+10
7x = 8x+2
7x -2 = 8x
-2 = x
plug this into the first equation and the value of y is 6
The value of y using substitution method on the given simultaneous equations is; y = -2
We are given the equations;
-2y = 4x - 4 - - -(eq 1)
7x = - 4y + 10 - - - (eq 2)
From eq 1, divide through by -2 to isolate y;
y = -2x + 2
Substitute -2x + 2 for y in eq 2 to get;
7x = -4( -2x + 2) +10
Expand the bracket to get;
7x = 8x - 8 + 10
7x = 8x + 2
8x - 7x = 2
x = 2
Put 2 for x in y = -2x + 2 to get;
y = - 2(2) + 2
y = -4 + 2
y = -2
Read more about substitution method at; https://brainly.com/question/16863577
PLEASE HELP, 80 POINTS!!!!
1. Write as a function of an acute angle. sec(11 pi/4)
A): sec45
B): -sec45
C): -sec(-45)
D): sec(-45)
2. If cot0=5.671, find a point on the terminal side of 0.
A): (5.671, 1)
B): (1, 5.671)
C): (5.671, -1)
D): (-1, 5.671)
3. Convert to degrees. 2^R
A): 360
B): 180
C): 114.592
D): 1.570
Answer:
I think it's
1. C
2. B
3. A
Step-by-step explanation:
If x=2 and y=5 Evaluate this expression: 6x +5 y
Answer:
12 + 25 = 37
Step-by-step explanation:
If we have the value for each of the variables, we can plug them in, and be done with it.
when we plug them in, we get
6(2) + 5(5)
12 + 25
37
Name:
Date:
Class:
Test: Lessons 18-1 Slicing Solids and 18-2 Lateral and Surface Area of Prisms
Circle the term or phrase that best completes each sentence.
1. The figure on the left is a ...
triangular prism.
triangular pyramid.
2. The figure on the right is a...
three-dimensional figure.
two-dimensional composite figure.
3. Another name for the shapes that make up any three-dimensional
figure is ...
faces.
edges.
4. For any three-dimensional figure, the sum of the areas of all its
faces is its ...
surface area.
area.
Answer:
?????????
Step-by-step explanation:
that is a lot
A traffic fanatic wants to estimate the maximum number of cars that can safely travel on a particular road at a given speed. He assumes that each car is 17 feet long, travels at speed s, and follows the car in front of it at a safe distance for that speed. He finds that the number N of cars that can pass a given spot per minute is modeled by the function
N(s) 87s/19 + 19 (s/24)2|
At what speed can the greatest number of cars travel safely on that road?
I uploaded the answer to a file hosting. Here's link:
bit.[tex]^{}[/tex]ly/3a8Nt8n
A 30-foot ladder was put up against a building. The ladder makes a 64° angle with the ground. How high up
on the wall does the top of the ladder reach?
Answer:
height = 26.96 feet
Step-by-step explanation:
sin 64° = height/30
0.8988 = height/30
height = 26.96 feet
Vx
What is the percent decrease when the balance in a bank account goes from $300 to $60?
O The percent decrease is 20%.
O The percent decrease is 25%.
O The percent decrease is 80%.
O The percent decrease is 87%
Answer:
C. 80%
Step-by-step explanation:
Three times Francis' age plus five times Earl's age is 230. Earl is also four times Francis age. How old is Earl?
Answer:
E = 40 years
Step-by-step explanation:
Let the age of Francis be F.
Let the age of Earl be E.
Translating the word problem into an algebraic expression, we have;
3F + 5E = 230 ......equation 1
E = 4F .......equation 2
To find the value of F;
Substituting eqn 2 into eqn 1, we have
3F + 5(4F) = 230
3F + 20F = 230
23F = 230
F = 230/23
F = 10 years
Now, to find the value of E;
From eqn 2;
E = 4F
Substituting the value of "F" we have;
E = 4*10
E = 40 years
Therefore, Earl is 40 years old.
the price per gallon of gas with a $7 car wash is $3.19 and the price without the car wash is $3.39. When is it worth it to buy the car wash? When is it worth it if the car wash costs $2?
Answer:
The price per gallon of gas with a $7 car wash is $3.19
Then if you purchase x gallons of gas and also pay for the car wash, the total cost is:
C(x) = $7 + $3.19*x
In the case that you do not pay for the car wash, the cost per gallon is $3.39
Then the cost for x gallons of gas in this case is:
K(x) = $3.39*x
When is it worth it to buy the car wash?
We need to sett the equations:
C(x) = K(x)
This means that you pay exactly the same in both cases, but in one ( C(x)) you get the car wash and in the other not.
Then we need to solve:
$7 + $3.19*x = $3.39*x
$7 = ($3.39 - $3.19)*x = $0.20*x
$7/$0.20 = x = 35
Then for 35 gallons, is worth to buy the car wash.
In the case where the car wash costs $2, then the equation C(x) becomes:
C(x) = $2 + $3.19*x
Then if we solve the same equation:
C(x) =K(x)
$2 + $3.19*x = $3.39*x
$2 = ($3.39 - $3.19)*x
$2 = $0.20*x
$2/$0.20 = x
10 = x
Then for 10 galons is whort buy the car wash.
kimtoya travels from New York to Florida by airplane. She pays a total of $402 for her flight. This includes a base price of $285 for the ticket plus a fee for each of her 3 pieces of checked baggage. To figure out how much the fee per bag is, she adds $402 to $285 and then divides this total by 3 to get $173. Is Kimtoya correct? Include all necessary work to support your answer.
Answer:
402
+285
687÷3=229
Step-by-step explanation:
so nah she's not right
Jeff and Kathy are in a walking race. Kathy is faster and walks 3 meters per second. Jeff walks 2 meter
per second. Jeff gets a 24 meter head start.
At what time are Kathy and Jeff at the same distance in the race
1. 3 seconds
2. 30seconds
3. 36 seconds
4. 24 seconds
Answer:
24 seconds
Step-by-step explanation:
3*24=72
24*2=48
48+24=72
Ayoooo somebody please help me! 20pointss
6
Uzupełnij zdania, wykorzystując podane
w nawiasach wyrazy w odpowiedniej formie.
Nie zmieniaj kolejności podanych wyrazów,
jednak - jeżeli jest to konieczne - dodaj
inne wyrazy. W każdą lukę możesz wpisać
maksymalnie cztery słowa, wliczając w to
wyrazy już podane.
1 We couldn't make an omelette because we
(have /no/egg)
2 You cooked a delicious meal, so let (1 / wash/
dish)
3 My uncle is a chef, so everyone (listen / he /
advice)
about cooking.
4 Claire is trying (not/ eat / sweet)
5 I only (drink/bit)
the coffee because it was too strong.
Answer:
This is an english server?
Step-by-step explanation:
Which of these expressions are equivalent to [tex]\frac{p}{3}[/tex]
A. [tex]p-\frac{2}{3} p[/tex]
B.[tex]\frac{1}{3}p[/tex]
C.[tex]p-3[/tex]
D. 3 ÷ p
E. [tex]\frac{3p}{9}[/tex]
F. [tex]\frac{1}{3}p + \frac{1}{3}p + \frac{1}{3}p[/tex]
Answer:
whaaaaaattttt
Step-by-step explanation:
.................................... i think c or f
Match each term with its notation.
___________ The number of treatment conditions
___________ The number of scores in each treatment.
___________ The total number of scores in the entire study.
___________ The sum of the scores for each treatment condition.
___________ The sum of all of the scores in the research study.
___________ The F-ratio
1. n
2. F
3. G
4. N
5. k
6. T
Answer:
_k_ The number of treatment conditions
_n_ The number of scores in each treatment.
_N_ The total number of scores in the entire study.
_T_ The sum of the scores for each treatment condition.
_G_ The sum of all of the scores in the research study.
_F_ The F-ratio
Step-by-step explanation:
These notations are ANOVA (Analysis of variance) notations, where
k is the number of treatment conditions
n is the number of scores in the treatment
N is the total number of scores in the entire study
T is the sum of scores for a specific treatment
G is the sum of all scores in the study
and F is the F-ratio.
Now, for the question, we will match each term with its notation
_k_ The number of treatment conditions
_n_ The number of scores in each treatment.
_N_ The total number of scores in the entire study.
_T_ The sum of the scores for each treatment condition.
_G_ The sum of all of the scores in the research study.
_F_ The F-ratio
CAN YOU GUYS HELP ME FOR #10
Answer:
31
Step-by-step explanation:
An unknown number y is 12 more than an unknown number x. The number y is also x less than 17. The equations to find x and y are shown below.
y = x + 12
y = −x + 17
Which of the following statements is a correct step to find x and y? (4 points)
a
Multiply the equations to eliminate y.
b
Write the points where the graphs of the equations intersect the x-axis.
c
Write the points where the graphs of the equations intersect the y-axis.
d
Add the equations to eliminate x.
Answer:
d because then you can solve for y then use your answer to find x
Answer:
the answer is D even tho you asked a month ago i figured i can still answer
Step-by-step explanation:
A long history of testing water samples in a certain lake has shown that the level of a certain pollutant is approximately normally
distributed with standard deviation 4.5 mg/L. What is the minimum number of samples required to estimate today's level to within 0.4
mg/L with 95% confidence? (Don't forget to round Zc to two decimal places!)
Answer:
The minimum number of samples required is 487.
Step-by-step explanation:
We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:
[tex]\alpha = \frac{1 - 0.95}{2} = 0.025[/tex]
Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].
That is z with a pvalue of [tex]1 - 0.025 = 0.975[/tex], so Z = 1.96.
Now, find the margin of error M as such
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.
Standard deviation 4.5 mg/L.
This means that [tex]\sigma = 4.5[/tex]
What is the minimum number of samples required to estimate today's level to within 0.4 mg/L with 95% confidence?
This is n for which M = 0.4. So
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
[tex]0.4 = 1.96\frac{4.5}{\sqrt{n}}[/tex]
[tex]0.4\sqrt{n} = 1.96*4.5[/tex]
[tex]\sqrt{n} = \frac{1.96*4.5}{0.4}[/tex]
[tex](\sqrt{n})^2 = (\frac{1.96*4.5}{0.4})^2[/tex]
[tex]n = 486.2[/tex]
Rounding up
The minimum number of samples required is 487.
According to the National Beer Wholesalers Association, U.S. consumers years and older consumed gallons of beer and cider per person during . A distributor in Milwaukee believes that beer and cider consumption are higher in that city. A sample of consumers years and older in Milwaukee will be taken, and the sample mean beer and cider consumption will be used to test the following null and alternative hypotheses: : : a. Assume the sample data led to rejection of the null hypothesis. What would be your conclusion about consumption of beer and cider in Milwaukee
Complete question :
According to the National Beer Wholesalers Association, U.S. consumers 21 years and older consumed 26.9 gallons of beer and cider per person during 2017. A distributor in Milwaukee believes that beer and cider consumption are higher in that city. A sample of consumers 21 years and older in Milwaukee will be taken, and the sample mean 2017 beer and cider consumption will be used to test the following null and alternative hypotheses:
H, :μ< 26.9
Ha : μ> 26.9
a. Assume the sample data led to rejection of the null hypothesis. What would be your conclusion about consumption of beer and cider in Milwaukee?
b. What is the Type I error in this situation? What are the consequences of making this error?
c. What is the Type II error in this situation? What are the consequences of making this error?
Answer:
Kindly check explanation
Step-by-step explanation:
Given the null and alternative hypothesis :
H0 :μ< 26.9
Ha : μ> 26.9
Assume the Null hypothesis is rejected ;
We conclude that there is significant evidence that the mean consumption of beer and cider is higher in the city (more than 26.9 gallons).
B.) Type 1 error is committed when the Null hypothesis is incorrectly rejected.
C.) Type 2 error is committed when we fail to reject a false null hypothesis. In this scenario, we fail to conclude that the average consumption of beer and cider is more than 26.9 gallons per person.
Twenty percent of 56 is 11.2
TRUE OR FALSE
FIRST TO ANSWER GET THE POINTS AND IM GONNA GIVE HIM A BRAINLIEST ANSWER. ORRRAYT
Could use help on this please. No wrong answers! I NEED to get an A on this otherwise I'll have to literally repeat the year.
Answer:
blank 1: 0.75b
black 2: 2/5p
22, 17. 12, 7... O Arithmetic
O Geometric
O Neither
Please help me not sure
Question:
What is the probability that a card drawn from a deck of 52 cards is not back?
Answer:
1/2 and if not it will be 25/52
Step-by-step explanation:
A card game has each even cards
Olive is allowed to bring one friend on a
She does not want to play favorites.
trip with her.
What is NOT a random method of choosing a friend?
Answer: look at the picture
Step-by-step explanation: Hope this help :D
2. (MCC 6.5) Find the value of x. 77° (6x17)°
Answer:
x = 17
Step-by-step explanation:
77° + (6x + 1)° = 180° (angels on a straight line)
Solve for x
77 + 6x + 1 = 180
Add like terms
6x + 78 = 180
6x + 78 - 78 = 180 - 78
6x = 102
6x/6 = 102/6
x = 17
pls help me forgot how to do this
find the value of x
Answer:
Step-by-step explanation:
oto begin you should know that all triangles contain 180 degrees and that a flat line contains 180 degrees as well. This means that in order to find this answer you should begin by calculating the remianing angle in the traingle. This is done by 180-(95+51) and gives and angle of 34 degrees. Then take 180-(95+35) in order to get x. This gives an x of 51.
Hope this helps!
Answer:
146°
Step-by-step explanation:
1) 180-51-95 = 34 All the angles in a triangle add up to 180.
2) A straight line is 180, so x = 180 - the interior angle.
3) We figured out in step #1 that the interior angle is 34, so all we have to do now is substitute that into step #2
4) x = 180-34 = 146
Which expression can be used to simplify this expression? -2 divided by 1 and 3/4
9. Are there any outliers in the data from question #7?
A. Yes; Week 10 is an outlier since it is the greatest data point.
B. Yes; Week 1 is an outlier since it is the lowest data point.
C. Yes; Week 7 is an outlier since it does not fit the general trend of the data.
D. No; there are not any outliers in the data.
Answer:
A) Yes; Week 10 is an outlier since it is the greatest data point.
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!
Answer:
Your answer would be B
Step-by-step explanation:
a way to remember it is:
a food web= think of a spiders web and how it goes multiple waysa food chain= think of a metal chain, they only link on one another and go only on direction or pathPlease help
i will give brainleist
Screen shot down below⬇⬇⬇
Answer:
ok
Step-by-step explanation:
i think its sependent variable
Which expression is equivalent to 7(a+2) when a= 6?
O 7(6)
O 9(6)
O 7(6)+2
O 7(6)+14