To solve the system of equations below, Chen isolated x2 in the first equation
and then substituted it into the second equation. What was the resulting
equation?
=
x2 + y2 = 16
² y²
运
4
= 1
25
O A. 16.my -
ОА
-
_y²
25
O B. Y? -16 2.1
4
25
O
O c. *? - 16-y2.1
H
4
25
OD. - 16 - 1
2 2
y? -
25
=
Answers
Answer:
50
Step-by-step explanation:
because chen isolated x2
Related Questions
I don't know the answer lol
Answers
Answer:
The answer is B
Step-by-step explanation:
Mr, Obrien needs to buy 8 television for the school. Each television costs $795. Mr. O'Brien has 120 fifty-dollar bills that he can use to pay for the televisions.
Part A.
How much will the 8 televisions cost?
Part B.
Does Mr. Obrien have enough money to buy all televisions he needs? If not, how many can he buy?
Answers
Answer:
A. $6360, B. He doesn't have enough money.
Step-by-step explanation:
Answer:
This answer is for only part A
1tv=$795
8 x 795 = 6,360
One pipe can fill a tank in 5 hours. A second can fill it in 3 hours. How long would it take both pipes together to make the tank 4 of the way full?
Answers
Answer:
An hour and a half 1.5
Step-by-step explanation:
The middle of the upper half of a set of organized data is called
Answers
The middle of the upper half of a set of organized data is called the upper quarter.
How is called the middle of the upper half?We can divide the organized data in two halfs or in 4 quartiles (the interquartile range), where each quartile contains 25% of the data.
Such that each of the two halfs would be divided into two quartiles.
The middle of the upper half (where the third quartile ends and the fourth starts) is called the upper quarter.
So, concluding, the middle of the upper half of a set of organized data is called the upper quarter.
If you want to learn more about organized data, you can read:
https://brainly.com/question/3514929
A school board randomly samples 80 students to determine their opinion on requiring school uniforms for the next school year. The table shows the results of the survey.
Opposed: 11
Undecided: 24
In favor: 45
A) If 1,200 students are in the district, how many students can be expected to oppose school uniforms?
B) Bernice says that based on the survey, a student is more likely to be undecided or opposed than in favor. Do you agree or disagree? Why or why not?
Answers
Using proportions, it is found that:
A. 165 students can be expected to oppose school uniforms.
B. From the sample, the most likely outcome is in favor, as it got the most responses, hence we should disagree with Bernice.
What is a proportion?A proportion is a fraction of a total amount.
Item a:
Out of 80, 11 opposed, hence, out of 1200, we apply the proportion and find that the amount will be of:
1200 x 11/80 = 165.
Hence, 165 students can be expected to oppose school uniforms.
Item b:
From the sample, the most likely outcome is in favor, as it got the most responses, hence we should disagree with Bernice.
More can be learned about proportions at https://brainly.com/question/24372153
Find the value of cos theta for the angle shown.
Answers
Answer:
Step-by-step explanation:
X = 4,0
hypotenuse = sqrt(4^2 + (-sqrt(33))^2 )
hypotenuse = sqrt(16 + 33)
hypotenuse = sqrt(49)
hypotenuse = 7
Cos(theta) = 4/ 7
The cos looks like it should be negative, but it is positive in quad 4.
Find the area of this circle.
A= ?
5 in
Hint: First, plug in the value
of the radius into the
formula for r.
Answers
Answer:
25π
Step-by-step explanation:
The formula for the area of a circle is [tex]\pi r^{2}[/tex]. In this case, [tex]r[/tex] is 5, to the area will we [tex]25\pi[/tex].
How much cash would you need to invest today if you knew you had to pay $1,000 each month for the next 5 years. Assume the annual interest rate is 12%. Round your answer to the nearest dollar.
Answers
Answer:
5600 $
Step-by-step explanation:
1000 multiply by 5 = 5000 multiply by 12 percent
600 add by 5000
5600
may anyone please help me with my math , Thank you very much. the choices are just S or N :)
Answers
Answer:
1. N, 2. S, 3. S, 4. S, 5. N*
Step-by-step explanation:
By "similar," I'm assuming you mean the same thing as "like" terms. Those are exactly the same (same variables and same exponents) but could have different coefficients (the number in front).
1. N variables are not the same
2. S variables are the same, exponents are the same
3. S same variables; same exponents (x^3 y^2 is the same as y^2 x^3)
4. S
5. N first term has z^2 in it; the second does not
*P.S. I'm having some trouble distinguishing your "two" from "zee."
If the 2nd expression is
[tex]\frac{1z zyx}{2}[/tex] then the terms are similar.
Xavier drove his car 70 miles with 7 gallons of fuel. How many more miles can he drive if he added 1 gallon of fuel?
Answers
i think 10 more miles.
70/7=10
which means he gets 10 more miles for every gallon of fuel
hi can u guys help me thank u and its worth 50 points :)
Answers
Answer:
The answer is the second option
Step-by-step explanation:
because the first two numbers 3 and 4 are a and b on a triangle and 6 is the hypothos
can someone answer this question now
Answers
Answer:
1. C 20, 23
2. A 40, 36
3. 00:25, 00:20
4. 0:54, 1:00
5. 0:31, 0:30
In preparation for the upcoming school year, a teacher looks at raw test scores on the statewide standardized test for the students in her class. Instead of looking at the scores relative to the norms in the state, the teacher wants to understand the scores relative to the students who will be in the class. To do so, she decides to convert the test scores into z-scores relative to the mean and standard deviation of the students in the class. The mean test score in her upcoming class is 202, and the standard deviation is 38.2.
The following are the scores for some (not all) of her students. Complete the table using the dropdown menus.
Student Test Score z-score
A 126 1.25
B 98
C 97 -0.26
D 88
E 66 -1.88
F 95
G 111 0.47
H 105
The teacher wants to identify those students who may need extra challenge or extra help. As a first cut, she decides to look at students who have z-scores above z = 2.00 or below z = -2.00.
Identify the test score corresponding to each of the following z-scores. Round to the nearest whole number.
For z = 2.00, test score = ______.
For z - -2.00, test score = ______.
Answers
Answer:
A)
Student Test Score z-score
A 126 1.25
B 98 -2.772
C 97 -0.26
D 88 -2.984
E 66 -1.88
F 95 -2.801
G 111 0.47
H 105 -2.539
B)For z = 2.00, test score =278.4
For z - -2.00, test score =125.6
Step-by-step explanation:
Student Test Score z-score
A 126 1.25
B 98
C 97 -0.26
D 88
E 66 -1.88
F 95
G 111 0.47
H 105
Mean = [tex]\mu = 202[/tex]
Standard deviation = [tex]\sigma = 38.2[/tex]
For Student B
x= 98
[tex]Z=\frac{x-\mu}{\sigma}=\frac{98-202}{38.2}=-2.722[/tex]
For Student D
x= 88
[tex]Z=\frac{x-\mu}{\sigma}=\frac{88-202}{38.2}=-2.984[/tex]
For Student F
x= 95
[tex]Z=\frac{x-\mu}{\sigma}=\frac{95-202}{38.2}=-2.8010[/tex]
For Student H
x= 105
[tex]Z=\frac{x-\mu}{\sigma}=\frac{105-202}{38.2}=-2.539[/tex]
Now we are supposed to find test scores :
For z = 2.00
[tex]Z=\frac{x-\mu}{\sigma}\\2=\frac{x-202}{38.2}\\(2 \times 38.2)+202=x\\278.4=x[/tex]
For z = -2.00
[tex]Z=\frac{x-\mu}{\sigma}\\-2=\frac{x-202}{38.2}\\(-2 \times 38.2)+202=x\\125.6=x[/tex]
Hence ,For z = 2.00, test score =278.4
For z - -2.00, test score =125.6
Determine the absolute value. Type the numerical answer only. l4l
Answers
Answer:
4
I hope this helps!
Tony spent $60.54 and bought 3packs if notebooks and a calculator.How much does a pack of notebooks cost if a calculator costs $45.87
Answers
Find the 7th term in the sequence -1,-5,-25
Answers
Answer:
-125
Step-by-step explanation:
-1 × 5 = -5
-5 × 5 = -25
-25 × 5 = -125
Under what circumstance can the quadratic function not be written in factored form
Answers
Answer:
When the discriminant of a quadratic function is negative than it is not be written in factored form.
Step-by-step explanation:
If a quadratic function is [tex]f(x)=ax^2+bx+c[/tex], then
1. It is factorable if [tex]D=b^2-4ac\geq 0,[/tex] i.e., graph of function intersect the x-axis, roots of the function are real.
2. It is not factorable if [tex]D=b^2-4ac< 0,[/tex] i.e., graph of function does not intersect the x-axis, roots of the function are imaginary or complex.
It means, the quadratic function not be written in factored form when the discriminant of a quadratic function is negative.
PLEEEAAAAAASE HELP!
What is the answer to this question?
Answers
Answer:
23 unitsStep-by-step explanation:
Perimeter is the sum of side lengths
Let's find the sides first
AB = √(-2- 2)² + (-4+1)² = 5BC = (2 - (-1)) = 3CD = √(-1- 2)²+(5-2)² = √18 = 3√2 = 4.24DE = √(-4 -(-1))²+(2-5)²= √18 = 3√2 = 4.24AE = √(-4-(-2)²+(2-(-4))²=√40= 2√10 = 6.32Perimeter is
P = 5 + 3 + 4.24 + 4.24 + 6.32 = 22.8 ≈ 23 rounded to the nearest whole numberHeeeeeeeeeelllppppppp
Answers
Answer:
C
Step-by-step explanation:
Reflect over y axis translation down & left.
9+8 divided by (-4)-12
Answers
Answer:
-1 1/16 if mixed number. If you want decimal form: -1.0625
Step-by-step explanation:
Your question was this:
9+8/(-4)-12
I want you first to get rid of the -4-12 and be done with it so here are the steps:
Rule: If negative subtract a negative, that shall be an addition problem with the larger number's symbol.
In this case, we need to add 4 and 12 together and include the negative symbol in front of the answer.
That shall be -16
Our Question now:
9+8/-16
So do 9+8 which is 17.
Our question now:
17/-16
Your answer is an improper fraction so you could change it to a mixed number or you could simply divide 17 and -16 to get a negative decimal.
Here are the possible answers:
Mixed Number: -1 1/16
Decimal Form: -1.0625
divide 8 and -4 to get -2
the set it up like
9-2-12
subtract 2 from 9 to get 7
7-12
then subtract 12 from 7 to get
-5
Mary fills a container with water. It holds 6 liters. How many milliliters does the container hold?
Answers
Answer:
the container that holds
6 liters= 6,000mL
Is the discriminant of f positive, zero, or negative ?
Answers
Answer:
Negative
Step-by-step explanation:
A quadratic that does not touch the x-axis always has a negative discriminant.
positive
Step-by-step explanation:[tex]As\ shown\ in\ the\ figure[/tex]
[tex]when\ g(x)=0,\ have\ 2\ real\ roots\ (b^2-4ac > 0,\ \ have\ 2\ real\ roots)[/tex]
[tex]So\ the\ discriminant\ of\ g\ positive[/tex]
I hope this helps you
:)
find a equation for the line below
Answers
Step-by-step explanation:
use the formula of the equation of line
Jasmine is riding on a carousal. She is sitting 9.5 feet from the center and it takes 20 seconds to
complete a rotation. What is Jasmine's linear speed (rounded to the nearest tenth)?
Answers
Answer:
2.983 ft/sec
Step-by-step explanation:
Given that
Distance between center and Jasmine riding on a carousal = 9.5 feet
Time taken to complete one rotation = 20 seconds
To find:
Jasmine's linear speed = ?
Solution:
Number of revolutions per minute = [tex]\frac{60}{20} = 3[/tex]
Formula for linear speed is given as:
[tex]v=\dfrac{2\pi}{60}\cdot r\cdot RPM[/tex]
Where [tex]r[/tex] is the radius of circular path and
[tex]RPM[/tex] is the number of revolutions per minute.
[tex]v=\dfrac{2\pi}{60}\times 9.5 \times 3\\\Rightarrow v=\dfrac{\pi}{10}\times9.5 \\\Rightarrow v = \bold{2.983\ ft/sec}[/tex]
Therefore, the linear speed is 2.983 ft/sec.
One of the angle measures of a right triangle is 36°. Which of the following is the measure of one of the other two angles of the triangle?
Answers
Answer:
54
Step-by-step explanation:
90°-36°=54°
Or
x+36+90=180°
x=180-126
x=54
Hope that helped! :)
Which of the following is the best first step to convert the following equation to slope
intercept form?
2-4y =-12
Answers
Answer: y=7/2 in decimal form 3.500
Step-by-step explanation: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
2-4*y-(-12)=0
Pull out like factors :
14 - 4y = -2 • (2y - 7)
Solve : 2y-7 = 0
Add 7 to both sides of the equation :
2y = 7
Divide both sides of the equation by 2:
y = 7/2 = 3.500
The length of a rectangle is 5 less than twice it’s width.The perimeter is 26 meters.Find the dimensions of the rectangle.
Answers
Let l be the symbol for length
Let w be the symbol for width
[tex]l = 2w - 5[/tex]
Our first equation is built according to the given that the length is twice the width subtracted by 5
Our second equation is built on the definition of perimeter. A perimeter is the sum of all sides of a polygon. A rectangle has 4 sides (2 lengths and 2 widths)
So the perimeter of a rectangle is=l+l+w+w=2l+2w
[tex]2l + 2w = 26[/tex]
This will be our second equation;
I can make a system of equations of 2 unknowns using my 2 equations;
[tex]2l + 2w = 26[/tex]
[tex]l -2w = - 5[/tex]
Add the two systems together by adding everything that is before the equal sign together and everything after it together.
[tex]2l + l + 2w - 2w = 26 - 5[/tex]
[tex]3l = 21[/tex]
[tex]l = \frac{21}{3} = 7 \: meters[/tex]
To find the width substitute L=7 in any equation;
[tex]l = 2w - 5[/tex]
[tex]7 = 2w - 5[/tex]
[tex]7 + 5 = 2w[/tex]
12=2w
w=12/2=6
The app is bugging, the width is 6 meters and the length is 7 meters
What is 12 5/25 as a mixed number simplest form?
Answers
Answer:
12 1/5
Step-by-step explanation:
5 can go into itself one time and 5 can go into 25 5 times hope that makes sense
Answer:
12 1/5
Step-by-step explanation:
An apartment has two closets. Closet #1 is 4 feet long and 5 feet deep; Closet #2 is 6 feet long and 3 feet deep. Both closets are 8 feet tall. Which closet is larger?
Answers
Answer:
Closet #1.
Step-by-step explanation:
Closet #1 is 4x5x8, right? so, 4x5=20, and 20x8=160 feet. Closet #2 is 6x3x8, and 6x3 is 18. That's already less than 20 even before we multiply by 8. So, the answer to your question is Closet #1.
Answer:
Answer: The first closet is larger.
Step-by-step explanation:
Closet #1
V = l × w × h
V = 4 ft. × 5 ft. × 8 ft.
V = 160 cu. ft.
Closet #2
V = l × w × h
V = 6 ft. × 3 ft. × 8 ft.
V = 144 cu. ft.
Compare the size of the closets
160 cu. ft. > 144 cu. ft.
Answer: The first closet is larger.
Please help solve this problem
Answers
Answer:
BCA and DCA
Step-by-step explanation:
Because the angle are next to each other. If you look at the others, none of them have the other listed beside them