Answer:
71
93.5
x=15.5
Step-by-step explanation:
(2x+40)+(5x+16)+(x)=180
you have to put all the measures together and equal it to 180. when it comes to triangles, all the angles added together are equal to 180.
now solve the equation and you should get this:
x=15.5
the next step is to solve the give equations separately:
2(15.5)+40=71
5(15.5)+16=93.5
(15.5)=15.5
now to check the work, you have to add all the measures that were just calculated:
71+93.5+15.5=180 so check!
You eat 11 grams of cereal each day. If you eat the same amount of cereal each day, how many grams of cereal will you eat in 5 days?
Answer:
55 grams
Step-by-step explanation:
11×5=55 grams
if its the same amount everyday then 55
(it made me type more)
Answer:55
Step-by-step explanation: 11x5
convert from vertex form to standard form... y= -(x-3)^2-8
Answer:
-x² + 6x - 17
Step-by-step explanation:
First, expand (x-3)² using FOIL
(x - 3)(x - 3)
= x² - 6x + 9
Distribute the negative sign to the expression:
-(x² - 6x + 9)
-x² + 6x - 9
Now, subtract 8 from this
-x² + 6x - 9
= -x² + 6x - 17
So, the equation in standard form is -x² + 6x - 17
The answer is.. x^2+6x-17
Find the area of the composite figure. Please help me
Answer:
51.5 ft^2
Step-by-step explanation:
answer these 3 questions please :) the table is shown above for these 3 questions
Answer:
Answer
Step-by-step explanation:
for 4. I think sports?
for 5. I think sports also.
Not sure though.. sorry if it's wrong.
using cramer’s rule, what are the values of x and y in the solution to the system of linear equations below?
The value of x =-3 and y=1 in the system of linear equation.
Given equations
-2x+3y+z=7
-4x-y-2z=15
x+2y+3z=-7
Using cramer's rule to find x and y
First we make matrix of coefficient of x,y and z and then find the determinant
[tex]A = \left[\begin{array}{ccc}-2&3&1\\-4&-1&-2\\1&2&3\end{array}\right][/tex]
Now we find determinant of A
|A|=-2(-3+4)-3(-12+2)+1(-8+1)
|A|=21
[tex]A_x=\left[\begin{array}{ccc}7&15&-7\\-4&-1&-2\\1&2&3\end{array}\right][/tex]
Determinant of Ax
|Ax|=7(-3+4)-3(45-14)+1(30-7)
|Ax|=-63
[tex]A_y=\left[\begin{array}{ccc}7&15&-7\\-4&-1&-2\\1&2&3\end{array}\right][/tex]
Determinant of Ay
|Ay|=-2(45-14)-7(-12+2)+1(28-15)
|Ay|=21
[tex]A_z=\left[\begin{array}{ccc}-2&3&1\\-4&-1&-2\\7&15&-7\end{array}\right][/tex]
Determinant of Az
|Az|=-2(7-30)-3(28-15)+7(-8+1)
|Az|=-42
Now we find for x, y and z
[tex]x=\frac{|A_x|}{|A|}[/tex]
= -63/21 = -3
[tex]y = \frac{|A_y|}{|A|}[/tex]
= 21/21 = 1
[tex]z = \frac{|A_z|}{|A|}[/tex]
= -42/21
= 2
Thus, the value of x =-3 and y=1 in the system of linear equation.
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Given question is incomplete, the complete question is below
using cramer’s rule, what are the values of x and y in the solution to the system of linear equations below?
A student took two national aptitude tests. The national mean and standard deviation were 475 and 100, respectively for the first test, and 40 and:8, respectively for me second test the studer scored 575 on the test and 60 on the second test. Uz scores to determine which earn the student performed better relative to the other testers:
a. first exam
b. second exam
Comparing the two z-scores, we can conclude that the student performed better relative to the other testers on the first exam because the z-score of 1 is closer to the mean (0) than the z-score of 2.5 on the second exam.
Given that the national mean and standard deviation were 475 and 100, respectively for the first test, and 40 and:8, respectively for the second test and the student scored 575 on the first test and 60 on the second test, we are to use z-scores to determine which exam the student performed better relative to the other testers.
A z-score is a numerical measure of a value's relationship to the mean of a group of values, measured in terms of the number of standard deviations from the mean. It can be calculated using the formula; z = (x - μ) / σ, where x is the value, μ is the mean, and σ is the standard deviation.
For the first exam;z-score = (x - μ) / σ = (575 - 475) / 100 = 1For the second exam;z-score = (x - μ) / σ = (60 - 40) / 8 = 2.5
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Given that a student took two national aptitude tests. The national mean and standard deviation were 475 and 100, respectively for the first test, and 40 and:8, respectively for me second test the student scored 575 on the test and 60 on the second test. The student performed better relative to other test-takers on the second test as the z-score of the second test is higher than the z-score of the first test.
In order to determine which test the student performed better on relative to other test-takers, we need to calculate the z-score for each test.
For the first test, the national mean is 475 and the standard deviation is 100.
The student's score is 575.
The z-score is calculated as:
z = (x - μ) / σ
z = (575 - 475) / 100
z = 1
For the second test, the national mean is 40 and the standard deviation is 8.
The student's score is 60.
The z-score is calculated as:
z = (x - μ) / σ
z = (60 - 40) / 8
z = 2.5
Since the z-score is a measure of how many standard deviations an observation is above or below the mean, a higher z-score indicates that the student performed relatively better compared to other test-takers.
Therefore, the student performed better relative to other test-takers on the second test as the z-score of the second test is higher than the z-score of the first test.
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Last season the girls' volleyball team had 5 seventh-grade students and 4 sixth-grade students. What is the ratio of sixth-grade students to seventh-grade students on the volleyball team? A 4:5 B 4:9 C 5:4 D5:9
Answer:
A) 4:5
Step-by-step explanation:
A) 4:5
B) 4:9
C) 5:4
D) 5:9
If there are 4 sixth grade students, you can already cross off D because there is no 4 as an option. There are 5 seventh grade students, you can cross off B because there's no 5. So now it's down to 4:5 or 5:4. Since it wants the ration of sixth to seventh, it's 4 to 5.
Hence, the ratio is 4:5, answer A
Hope this helps :)
Stay Cold,
Brook
Five students took a quiz. The lowest score was 4, the highest score was 6, the average (mean) was 5.2, and the mode was 6. A possible set of scores for the students is:
A possible set of scores for the students is: 4, 4, 6, 6, 6
How to solve the measures of Central Tendencies?We are given that five students took the quiz. If the lowest score is 4 and the highest score is 6, we can say that the set of values can be expressed as:
4, x, y, z, 6
Here we can see that the mode is 6 and the mean is 5.2. Therefore, at least one other student of hers has scored her 6, which could result in:
4, x, y, 6, 6
Therefore:
(4 + x + y + 6 + 6)/5 = 5.2
16+x+y=26
x + y = 10
So the other two numbers are probably 6 and 4, because 6 is the mode, so they can't both be 5.
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Simplify: 6a - 2(5a - 6)
Answer:
[tex]-4a + 12[/tex]
Step-by-step explanation:
A gardener made a scale drawing of a lawn with a scale factor of 1:4 The dimensions of her drawing are 15 inches long by 10 inches wide. Her partner plans to make another scale drawing of the lawn, but with a scale factor of 1:20. What are the dimensions of her scale drawing? O A. The length is 50 inches and the width is 75 inches, OB. The length is 3 inches and the width is 2 inches. O Q. The length is 75 inches and the width is 50 inches. O D. The length is 2 inches and the width is 3 inches.
Answer:
B is the correct answer
Step-by-step explanation:
Find the difference. Write your answer in simplest form.
9/10 - 5/10
Answer:
2/5 is the simplest form.
Step-by-step explanation:
9/10 - 5/10 = 4/10 (9 - 5 = 4) 4/10 simplified is 2/5 (divide both 4 and 10 by 2 and you get 2/5).
Hope that helps!
What is angle BXC and why?? Please help
Answer:
BXC=70 degrees
Step-by-step explanation:
XBC = 55
corresponding angles are equal
XCB=55
isosceles base angles are equal
BXC=70
angles in a triangle add up to 180 degrees
ver imagen para la pregunta
Answer: C
Step-by-step explanation:
the measure of the vertex angle of an isoceles triangle is 120 degrees and the length of a leg is 8 cm. find the length of the diameter circumcised about this triangle
The length of the diameter circumcised about this isosceles triangle is 32 cm.
To find the length of the circumcircle's diameter, we can use the properties of an isosceles triangle.
In an isosceles triangle, the vertex angle is the angle formed by the two congruent sides. In this case, the vertex angle is given as 120 degrees.
We know that the vertex angle of an isosceles triangle is located opposite the base. Let's denote the base as side a, and the congruent sides as side b.
In an isosceles triangle, the base angles are congruent. Since the sum of the angles in a triangle is 180 degrees, each base angle in this triangle measures (180 - 120) / 2 = 30 degrees.
Now, we can apply the Law of Sines to find the length of the base, side a. The Law of Sines states:
a/sin(A) = b/sin(B) = c/sin(C)
In our case, since angle A is the vertex angle and side a is the base, we have:
a/sin(120) = b/sin(30)
Using the given length of the leg (side b) as 8 cm, we can solve for side a:
a/sin(120) = 8/sin(30)
a = (8 × sin(120)) / sin(30)
Using the values of sin(120) and sin(30) from a trigonometric table or calculator:
a ≈ (8 × √3) / (1/2) = 16√3 cm
Now, let's find the length of the diameter of the circumcircle. The circumcircle of a triangle passes through the vertices of the triangle and has its center at the intersection of the triangle's perpendicular bisectors.
Since the triangle is isosceles, the perpendicular bisector of the base will pass through the vertex angle and bisect it, resulting in two 60-degree angles.
In an equilateral triangle, the perpendicular bisector of a side passes through the triangle's center, which coincides with the center of the circumcircle. Since our isosceles triangle has two congruent sides, we can treat it as half of an equilateral triangle.
The length of the diameter of the circumcircle of an equilateral triangle is given by the formula:
Diameter = 2 × (side length) / √3
In our case, since we have half of an equilateral triangle, the diameter of the circumcircle will be:
Diameter = 2 × (16√3) / √3 = 32 cm
Therefore, the length of the diameter circumcised about this isosceles triangle is 32 cm.
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A gift box has the shape of a rectangular prism. How much wrapping paper do you need to cover the box?
Thanks in advance!
Answer:
852 inches square
Step-by-step explanation:
2×(16×15 + 16×6 + 15×6)
Answer:
652 in²
Step-by-step explanation:
The formula is 2(wl+hl+hw)
h is height
w is width
l is length
Use PEMDAS/BIDMAS/BODMAS (do the parentheses then multiply it)
326*2 = 652
add your units
652 in^2
Yesterday, the temperature change for a 5-hour period of time was – -degree per
hour. Which statement describes this change?
A
The temperature rose 5 degrees.
B
The temperature rose 4 1/4 degrees.
с
The temperature fell 4 degrees.
D
The temperature fell 5 4/5
degrees
Answer:
D
Step-by-step explanation:
26.2 miles in 4 hours. Find the unit rate
Answer:
Step-by-step explanation:
Unit rate = 26.2 ÷ 4 = 6.55
Can someone plz help me if u understand plz I beg u and care to explain if wanted
Answer:
first circle is radius= 12.5 inches and diameter= 25 inches
second circle is radius=2 feet and diameter=4 feet
Step-by-step explanation:
radius is the point halfway down the circle. diameter is full length straight across the whole circle.
further analysis;
in the first circle it gives you the diameter which is 25 inches. in order to get the radius you cut 25 in half which is 12.5 inches.
in the second circle it gives you the radius which is 2 feet. in order to get the diameter you need to double 2 feet which is a total of 4 feet.
Save Homework: Sanchez HW 4 Question , 4.5.39 Pat 34 HW Score: 0.005, 333 points O Points of 1 Complete and card deviation of doctor in the computer and concerts and round and your resu michewa Cost of Living Adjustments Data Obwodoma ) Comparative Stary Mean Standard 52175510 Deviation ed the compartimothes for wema) City Comparative - Say Om NY $16.00 Coors for the land setting percentage and women and CITY Housing Los - 20 Cost of living we City Comparative Housing Sutary OC 587 2105 saepe 187 Love Bone 0.00 229 SEL $50.04 - Nupo 38.000 eden 348.904 1411 Los 3807 New 567.50 245 Portu New Y 47 154570 17 37 15457 NY 49 0 Print Done?
The mean housing cost for the given cities is $20.42.
The standard deviation of housing costs for the given cities is 1.91.
The mean is calculated by summing up all the values in the dataset and dividing the sum by the total number of values. In this case, we have the following data for housing costs in different cities:
Comparative City Housing Cost
NY $16.00
Coors $20.00
Los Angeles $22.05
Santa Barbara $18.70
Oceanside $22.90
Porterville $20.50
New York $21.40
To calculate the mean, we add up all the values:
Sum = $16.00 + $20.00 + $22.05 + $18.70 + $22.90 + $20.50 + $21.40 = $141.55
Next, we divide the sum by the total number of values, which is 7 in this case:
Mean = $141.55 / 7 = $20.42
Therefore, the mean housing cost for the given cities is $20.42.
The standard deviation is a measure of the spread or variability in the dataset. It tells us how much the individual values deviate from the mean.
The formula for calculating the standard deviation is:
σ = sqrt[(Σ(x - μ)^2) / N]
Where:
σ is the standard deviation
Σ represents the sum of
x represents each individual value
μ is the mean
N is the total number of values
Using the given data, we substitute the values into the formula:
σ = sqrt[((16 - 20.42)^2 + (20 - 20.42)^2 + (22.05 - 20.42)^2 + (18.70 - 20.42)^2 + (22.90 - 20.42)^2 + (20.50 - 20.42)^2 + (21.40 - 20.42)^2) / 7]
Simplifying the expression within the square root:
σ = sqrt[(5.2364 + 0.0016 + 0.0264 + 2.7164 + 0.0524 + 0.0064 + 0.0064) / 7]
σ = sqrt[8.0456 / 7]
σ = sqrt(1.1494)
σ ≈ 1.07
Therefore, the standard deviation of housing costs for the given cities is approximately 1.07.
These calculations provide a measure of the average and spread of the housing costs across the different cities.
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Sophia invest $12,350 in a account that earns 4.5% annual simple interest. Assuming she makes no additional deposits or withdrawals, how much interest will Sophia earn after 36 months?
Answer:
I DO NOT KNOW
Step-by-step explanation:
I am here for the answers
I am hungry
Pizza
Pls helpppp and thank you
I need help I don’t really get it
Answer:
A. 72 cm
Step-by-step explanation:
72 x 2/3 = 48
Answer:
72 cm
Step-by-step explanation:
if the smaller figure is 48 cm and its a 2/3 ratio
lets just say 2x:3x
2x=48 so x would =24
then the larger perimeter would be 3*24 which is 72
Question 2 of 10
If f(x) = 3x - 1 and g(x) = x + 2, find (f+ g)(x).
A. 4x + 1
B. 2x - 3
с. 3х – 3
D. 2x - 1
what number adds up to three and multiples 22 to
Answer:
Factors of 22: 1, 2, 11, and 22.
Prime Factorization of 22: 22 = 2 × 11.Step-by-step explanation:
Write the equation of the line if the slope is 6 and the y-intercept is -2.
Answer:
y=6x-2
Step-by-step explanation:
slope=6
y-intercept=-2
y=6x-2
8 z
6
OD
UN
4 3
N
1 2 3 4 5 6 7 8 9
x
Which two equations represent the situation?
o y=jx and y=x-4
o =
O y=3+ and y = X+4
O y = 3x and y = x+4
O y = 3x and y = x-4
Answer:
Step-by-step explanation:
determine the volume of the rectangular prism.
height:12ft
width:6ft
length:3ft
Answer:
216 ft³
Step-by-step explanation:
h*w*l=v
[tex]12 \times 6 \times 3 = 216[/tex]
A roast beef sandwich costs $6.75. A customer buys multiple roast beef sandwiches. Write an equation that represents the situation. Use $x$ to represent the number of roast beef sandwiches. Then determine how many sandwiches the customer buys.
Amount Used for Payment $80
Change Received $19.25
An equation that represents this situation is
.
The customer buys
sandwiches.
Answer:
[tex]\frac{80-19.25}{6.75} = x[/tex]
Step-by-step explanation:
Subtract $19.25 from the Amount Used for Payment ($80) to get the amount spent, then divide the amount of each sandwich to get the amount of sandwiches bought.
Write the coordinates of the vertices after a dilation with a scale factor of 3, centered at the origin. 10 B 10 0 10 А С 10 A(1, 2) A'l B(1, 3) - BC
Answer:
A'=(4,-8)
B'=(4,12)
C'=(-12, -12)
Step-by-step explanation:
Ad 3 to the location you are heading remember first is x then y so (x, y)
X is always left and right
Y is always up or down
10/y=2/9, find the solution of y. stat.
Answer:
y=45
Step-by-step explanation:
Let's solve your equation step-by-step.
10 y = 2 /9
Step 1: Cross-multiply.
10 y = 2 /9
(10)*(9)=2*y
90=2y
Step 2: Flip the equation.
2y=90
Step 3: Divide both sides by 2.
2y /2 = 90 /2
y=45
brainliest please?
Answer:
y = 45
Step-by-step explanation:
10/y=2/9
10 = y * 2/9
10 = 2/9y
10 * 9 = 2/9y * 9
90 = 2y
90/2 = 2y/2
y = 45
ps: * means multiply
Im new here :) but hey you got these qs try your best okie
I hope and im glad to help