Answer:
x = 1/2 y = -1/3
Step-by-step explanation:
Split it into 2 equations:
10x-9y=8
and
21y+15x=0.5
10x - 9y = 8
Step 1: Divide both sides by 10:
x = (8+9y)/(10)
Substitute x = (8+9y)/(10) into 21y+15x=0.5 :
21y + (3(8+9))/(2) = 0.5
Solve for y
y= -1/3
Substitute y= -1/3 into x = (8+9y)/(10)
x = 1/2
Assuming y>0, which of the following expressions is equivalent to 8√18y^2−5√50y^2
A. −y√2
B. 7y√3
C. 24y√3−25y√2
D. 2y√2
Answer:the answer is A
Step-by-step explanation:
kathy walked 3/4 mile to piano lessons every day.How many miles does she walk in 4 days
Answer:
3 miles.
Step-by-step explanation:
Given that Kathy walks 3/4 mile every day.
[tex]\frac{3}{4}mile = 1 day[/tex]
Let's multiple it by 4.
[tex]\frac{3}{4} (4)[/tex]
Find common factor of both 4 to simplify, so of course 4.
[tex]\frac{3}{1} (1)[/tex]
Multiply across and the number should be 3! Hope that helped
which is the best estimate for 10 drops of liquid?
A. IL
B. 1 cL
C. 1 mL
D. 1dL
E. 1 KL
Hurry please!!
Answer:
The answer is a A. I just took a short test about it.
Step-by-step explanation:
plz give brainliest and rating
What is the outlier for 437,456,513,650,893,954,1018,1038,1117, and 1465
The ratio of boys to girls in Ms. Gonzalez's class is 3 to 4. There are 12 girls in the class. What is the total number of students in Ms. Gonzalez's class?
Answer:
there are 21 students in her class.
Step-by-step explanation:
Since the 12 girls corresponds to the 4 in the ratio, I multiplied the 3 by three to get the amount of boys. then add the boys to the girls to get 21 students.
What is 96% of 675 pls exxplain
Answer:
648
Step-by-step explanation:
96 percent *675 =
(96:100)*675 =
(96*675):100 =
64800:100 = 648
Answer:
27
Step-by-step explanation:
I can't explain sorry
The language arts teacher wants to know whether the students in the entire school prefer a debate or an speech. The teacher draws a random sample from the following groups: All teachers in the school All boys in each grade All students in the speech club All students in each grade Which group best represents the population she should take a random sample from to get the best results for her survey? (5 points) a All teachers in the school b All boys in each grade c All students in the speech club d All students in each grade
Answer:
D, all the students in each grade
Step-by-step explanation:
Since the teacher wants to find out the opinion of the the entire school, they should take a random sample from each grade because it is representative of the population they want to sample. If it was just boys, it would exclude the girls, and vice versa for the girls. The teachers aren’t part of the population the teacher wants to survey, so the teacher shouldn’t survey them. Thus, that leaves the random sample from each grade.
At the Museum of Modern Art , 5 students share 4 subs.
How much of a sandwich does each student get?
First to awnser correctly gets brainliest
(Middle School)
Answer:
1.25 of a sandwich
Step-by-step explanation:
5/4=1.25
I'm not sure if you have to round it or not, but I think this would be exact!
Hope this helps!
20 points! Please help
A population has a standard deviation of 7.89. What is the approximate standard error of the mean for a sample size of 300?
A.
0.026
B.
0.46
C.
17.32
D.
2.20
Using the Central Limit Theorem, it is found that the approximate standard error of the mean for a sample size of 300 is given by:
B. 0.46
What does the Central Limit Theorem State?It states that the sampling distribution of sample means of size n from a population with standard deviation [tex]\sigma[/tex] has standard error [tex]s = \frac{\sigma}{\sqrt{n}}[/tex]
In this problem, we have that the parameters are [tex]\sigma = 7.89, n = 300[/tex], hence the standard error is given by:
[tex]s = \frac{7.89}{\sqrt{300}} = 0.46[/tex]
Hence option B is correct.
More can be learned about the Central Limit Theorem at https://brainly.com/question/24663213
#SPJ2
ANSWER THE QUESTION FOR BRAINLIEST
Answer:
C, the graph is increasing when x is between -1 and 2.
Step-by-step explanation:
When it is increasing, it is getting higher up the y axis. The other two lines are going lower down the x axis so they are decreasing. This means that it has to be C.
hope this helps :)
Cassandra reads 28 pages of a book in 1 1/6 hours. Express her reading speed in pages per hour?
Answer:
0.24 pages per hour
Step-by-step explanation:
To solve this you have to divide total pages by the hours to get the speed per hour. Here is the equation;
28 / 116 = 0.2413793103448276
Hope this helps!
Can someone please help me out with this?
Can someone please help me out with this? I reckon that the answer would be A because its just the median of the median so that would x out median and B and D simply don’t make sense to me. Do you guys agree with me or not? I just wanna make sure I am thinking about this the right way.
Put the word “aware” before or after your answer if your gonna send a link. I would like to know if they are bots. (99% sure they are)
Answer:
B (range)
Step-by-step explanation:
The IQR would actually increase, because the Q1, Q2, and Q3 would get most likely larger. (Or possibly stay the same).
The median would most likely increase, possibly stay the same.
The maximu would stay the same.
The range would decrease, because right now it’s 13, so without the outlier, the minimum value would be closer to the rest of the data.
Please help me i have no clue what the answer is :?
Answer:
1. Yes
2. They could change the 60° angle into a different one.
Step-by-step explanation:
1. Two triangles are the same if they share two side lengths with the same angle between them.
2. Since the triangles are equal if they share two side lengths with the same angle between them, if they changed the angle between 3 and 5, it'd no longer be the same triangle.
Lisa has $7.80 to spend on some tomatoes and a loaf of bread. Tomatoes
cost $1.20 per pound, and a loaf of bread costs $1.80.
The inequality 1.20x + 1.80 s 7.80 models this situation, where x is the
number of pounds of tomatoes.
Solve the inequality. How many pounds of tomatoes can Lisa buy?
Answer:
Lisa can buy 5 pounds of tomatoes.
Step-by-step explanation:
Given that Lisa has $ 7.80 to spend on some tomatoes and a loaf of bread, and tomatoes cost $ 1.20 per pound, and a loaf of bread costs $ 1.80, to determine how many pounds of tomatoes she can buy, the following calculation must be performed:
1.20X + 1.80 = 7.80
1.20X = 7.80 - 1.80
X = 6 / 1.20
X = 5
So Lisa can buy 5 pounds of tomatoes.
I need helpppp plssss anyone I’m not the best at math :/
Answer:
C
Step-by-step explanation:
Pls answerwer for me
please help!!!
Can you use Pythagorean Theorem to find the missing side of this triangle? Why or why not?
Answer and Explain, please.
Answer:
No, Pythagorean Theorem can't be used here for finding the missing sides of the triangle.
Because Pythagorean Theorem is used in triangles having one of its sides right angled but here in the diagram non of the sides of the triangle are right angled .
Answer:
NO
Because pythagorean Theorem is used to find the missing side in the triangle if the other sides are there
C=3y
2
+4y+4
D=−7y
2
+3y−6
Answer:
Johannes Gutenberg - Wikipediahttps://en.wikipedia.org › wiki › Johannes_Gutenberg
Johannes Gensfleisch zur Laden zum Gutenberg was a German goldsmith, inventor, printer, and publisher who introduced printing to Europe with his ...
Occupation: Engraver, inventor, and printer
Born: Johannes Gensfleisch zur Laden zum G...
Died: February 3, 1468 (aged about 68); Mainz, ...
Known for: The invention of the movable-type ...
Early life · Printing method with... · Legacy · References
People also ask
Step-by-step explanation:
Permudahkan ungk
8a + 3b - 2a - b
Answer:
answer:8a + 3b - 2a - b
=8a-2a+3b-b
=6a+2b or 2(3a+b) is your answer
i need help please i did not understand
Answer:
Step-by-step explanation:
Add up all the values for the height and divide by 9. do the same for the leaf scars.
What is the least common multiple of 9 and 15?
Answer:
45
Step-by-step explanation:
Find prime factors
9 = 3 x 3
15 = 3 x 5
3 x 3 x 5 = 45
a triangle has two sides of lenghts 10 and 14 what value could the length of third side be, check all that apply.
Answer:
A 5
B 16
E 8
F 10
Step-by-step explanation:
Equation of a trendline is: y = 50x + 2. What is the
value of y if x is given as 3.5?
A. 175
C. 180
B. 177
D. 201
Answer:
B : 177
Step-by-step explanation:
hello :
put x=3.5 in the equation you have : y = 50(3.5)+2 =175+2=177
Which situation results in a final value of zero
Answer:
Step-by-step explanation:
3×1/6 Please please help
Answer:
3 can be made into 3/1. multiplying fractions is easy, divide the numerators together and the denominators together. 3x1=3 and 1x6=6. the answer is 3/6 which can be simplified into 1/2
Step-by-step explanation:
hope this helps!
What is the volume of a cube with a side length of 2/5 cm?
What is the volume of a cube with a side length of 2/5 cm? 0.4 cm
Answer:
8/125 cm³
Step-by-step explanation:
(2/5)³=2³/5³
= 8/125 cm³ or 0.064
1. Find the surface area of the triangular pyramid.
12 yd
17.3 yd
20 yd
What is the surface area of the triangular pyramid
what is the value of 2/5 ( 1/3 + 1/2)
Answer:
1/3
Step-by-step explanation:
Answer: 2/5 (1/3 + 1/2) = 1/3 ≅ 0.3333333
Step-by-step explanation:
Which of the statements is false about the additive identity?
A. if y is the additive identity, then x+y=x
B. the value of the additive identity is 0
C. Adding the additive identity corresponds to making no movements at all on the number line
D. it is the number you add to another number to get 0
Answer:
The Identity Property of Zero, also called the Additive Identity Property, states that if you add 0 to any number, the result will be that number. Likewise, if you subtract 0 from any number, the result will be that number. Believe it or not, this works for all real numbers.
Step-by-step explanation:
If Amelia wants to make the maximum amount of money working only 22 hours per week, which company should she work for? Explain your answer. Company A: Using linear regression models from both data sets, she determines that it pays about $14 more. Company A: Using quadratic regression models from both data sets, she determines that it pays about $5 more. Company B: Using linear regression models from both data sets, she determines that it pays about $10 more. Company B: Using exponential regression models from both data sets, she determines that it pays about $8 more.
Answer:
B
Step-by-step explanation:
Answer:
Company A
Step-by-step explanation:
She should work for company A because they pay the most. Also because she would earn $308 during 22 hours. Hopes this helps! :)