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?
A. The length is 3 inches and the width is 2 inches.
B. The length is 50 inches and the width is 75 inches.
O c. The length is 2 inches and the width is 3 inches.
O D. The length is 75 inches and the width is 50 inches.
Answer: A.
Step-by-step explanation:
I just took the exam
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2. Rosa made a mosaic wall mural using 15 black tiles, 60 blue tiles, and 25 red tiles. Write a percent to represent the number of red tiles that were used in the mural.
9514 1404 393
Answer:
25%
Step-by-step explanation:
The ratio of red tiles to all tiles is ...
25/(15 +60 +25) = 25/100 = 25%
25% of the tiles were red tiles.
_____
Additional comment
It is often useful to think of the % symbol as being equivalent to /100, and vice versa.
Study each equation, then solve.
18) 5 + r = 6 - r
Answer:
5+r=6-r
-5 -5
r=1-r
+r +r
2r=1
÷2 ÷2
r=1/2
2 1/4 yd x 1/4 yd
stuck, please help
Answer:
9/16 yd^2
Step-by-step explanation:
2 1/4 as an improper fraction is 9/4, 9/4 * 1/4 = 9/16, and since you are multiplying two yards, thats yard^2, so 9/16 yd^2
Round to the nearest hundredth 2^x =243
9514 1404 393
Answer:
7.92
Step-by-step explanation:
The value of x can be found by taking logarithms.
x·log(2) = log(243)
x = log(243)/log(2)
x ≈ 7.9248125...
x ≈ 7.92
__
A graphing calculator offers a couple of different options for solving the problem.
What is the solution to this system of equations? 4x + 5y = 7
3x – 2y =-12
The solution is
(-2, 3)
(3.-1)
(18. -9)
(13,-9)
Answer:
(-2, 3)
Step-by-step explanation:
4x + 5y = 7
3x - 2y = -12
Let's solve this by elimination. We want to eliminate one variable at a time. This means we need to multiply the equations to create a common multiple to cancel out a variable.
Let's work with y.
5y and -2y: For these values to cancel out, we need to multiply each term to create a common multiple.
2(4x + 5y = 7)
5(3x - 2y = -12)
Multiply.
8x + 10y = 14
15x - 10y = -60
Eliminate.
23x = -46
Divide both sides by 23.
x = -2
Now that we know x, let's plug it back into one of equations to find y.
4x + 5y = 7
4(-2) + 5y = 7
Multiply.
-8 + 5y = 7
Add.
5y = 15
Divide.
y = 3
Now we know x and y; let's plug both back into the equation we have not checked yet.
3x - 2y = -12
3(-2) - 2(3) = -12
Multiply.
-6 - 6 = -12
Subtract.
-12 = -12
Your solution is correct.
(-2, 3)
Hope this helps!
Is this correct? Or are the numbers wrong
Answer:
I think that's right. But the angle in the corner actually might be the 28 degrees. One sec this question is a little confusing
Step-by-step explanation:
In a class of students, the following data table summarizes how many students have a cat or a dog. What is the probability that a student chosen randomly from the class has a cat or a dog?
Has a cat Does not have a cat
Has a dog 9 2
Does not have a dog 4 5
Answer:
0 students have a cat and 92 students have a dog
The probability that a student is chosen randomly from the class has a cat or a dog is 15/20.
What is the probability?Probability refers to a possibility that deals with the occurrence of random events. The probability of all the events occurring need to be 1.
The formula of probability is defined as the ratio of a number of favorable outcomes to the total number of outcomes.
P(E) = Number of favorable outcomes / total number of outcomes
The class has a cat and a dog = 9
Has a dog and does not have a cat = 2
Does not have a dog and has a cat = 4
Does not have dog and cat = 5
The total strength of the class is 20
The probability that a student is chosen randomly from the class has a cat or a dog = Number of favorable outcomes / total number of outcomes
P(E) = 15 /20
Hence, The probability that a student is chosen randomly from the class has a cat or a dog is 15/20.
Learn more about probability :
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You pick a card at random.
2 3 4 5
6 7 8 9
What is P(5)
Write your answer as a percentage.
Step-by-step explanation:
There are a total of 8 cards, you are picking only one card,
therefore P(5) =
[tex] \frac{1}{8} \times 100 \\ = \frac{100}{8} \\ = 12.5percent[/tex]
My question... please answer asap
Answer:
slope=1/4
y-intercept=3
y=.25x+3
Step-by-step explanation:
slope=rise over run so
slope=1/4
y-intercept is the value of y where the line crosses the y axis..
y-intercept=3
In y=mx+b form m is slope and b is y-intercept so...
y=.25x+3
Of the population of all fruit flies we wish to give a 90% confidence interval for the fraction which possess a gene which gives immunity to fungal infections. To this end we have obtained a random sample of 400 fruit flies. We find that 280 of the flies in the sample possess the gene. Give the margin of error for the 90% confidence interval. Round your answer to 3 decimal
Answer:
The margin of error for the 90% confidence interval is of 0.038.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which
z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].
The margin of error is:
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
To this end we have obtained a random sample of 400 fruit flies. We find that 280 of the flies in the sample possess the gene.
This means that [tex]n = 400, \pi = \frac{280}{400} = 0.7[/tex]
90% confidence level
So [tex]\alpha = 0.1[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.1}{2} = 0.95[/tex], so [tex]Z = 1.645[/tex].
Give the margin of error for the 90% confidence interval.
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
[tex]M = 1.645\sqrt{\frac{0.7*0.3}{400}}[/tex]
[tex]M = 0.038[/tex]
The margin of error for the 90% confidence interval is of 0.038.
This is hard please help
Answer:
SA = 208 in²
Step-by-step explanation:
SA = 2(2)(7) + 2(2)(10) + 2(10)(7) = 208 in²
Answer:
208 in^2
Step-by-step explanation:
SA: 2(w · l + h · l + h · w) formula
SA: 2(2 · 7 + 10 · 7 + 10 · 2) plug the numbers in- w: width, l: length, h: height
SA: 2(14 + 70 + 20) find area of 3 sides with different areas
SA: 28 + 140 + 40 doubling
SA: 208 final answer
Aziza has a triangle with two sides measuring 11 in. and 15 in. She claims that the third side can be any length as long as
it is greater than 4 in. Which statement about Aziza's claim is correct?
O Aziza's claim is not correct. The third side must be between 4 in. and 26 in.
O Aziza's claim is not correct. The third side can be any length less than 26 in.
O Aziza's claim is not correct. The third side can be any length.
O Aziza's claim is not correct. The third side must create a scalene triangle.
The 4th one? i think im not sure tho
Step-by-step explanation: The correct answer is A: O Aziza's claim is not correct. The third side must be between 4 in. and 26 in.
Which of the following equations represents a linear function
Answer:
its B
Step-by-step explanation:
please like my answer . brainliest please
help me please i’ll give you brainliest
Answer:
He should have canceled x
56. The zip code of a location consists of five digits chosen from the set Z shown below.
Z= {0, 1, 2, 3, 4, 5, 6, 7, 8,9}
The set L represents the digits in the zip code for Key Largo.
L = {3,3,0,3,7)
The set K represents the digits in the zip code for Killarney.
K= {3,4,7,4,0}
How many odd numbers are in the set "(L UK)?
Answer:
2 I.e 3 and 7
Step-by-step explanation:
(L U K)={0,3,4,7} [ elements are not repeated in set ]
odd numbers = 3 & 7
AB is the mindset of the trapezoid. Find the value of X.
Answer:
AB has a bad mindset :(
X is valued a lot bc he helps out AB
damon buyd a rose bush priced at $10. if the sales tax ix 10% how much tax will damon pay
Answer:
Before Tax Price: $10.00
Sale Tax: 10.00% or $1.00
After Tax Price: $11.00
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those answers bussin bussin 2 bad u cant have none
Please help will give brainliest
Answer:
Should be 70 since <B is also 70
Step-by-step explanation:
Going by the diagram, you just read the value of x. The value of y requires a little bit of calculation. x=70 degree
Step-by-step explanation: Step One
Find x
You just read the value.
x is the same as the 70 degree angle. That comes about from parallel lines.
x = 70 degrees. <<<< answer
Step Two
Find y
All triangles have 180 degrees.
So ABC has 180 degrees.
70 + 50 + <ACB = 180 Combine like terms
120 + <ACB = 180 Subtract 120 from both sides
<ACB = 180 - 120
<ACB = 60
y = <ACB
y = 60 degrees. <<<< Answer.
hoped this helped :)
A computer generates a two-digit number random number. It can be any number from 00 to 99.
Find the probability that it is 99
Answer:
1/99
Step-by-step explanation:
total is 99 and there is only one 99 between 0-99 so the probability is 1/99
ZABD and ZDBC are supplementary angles.
What is the measure of x?
x = [?]°
7D
AK
126
x
B
-С
Angles are not drawn to scale.
Enter
x=102°Answer:
x+78=180 supplementary angle
x=180-78=102
Luis solved the following equation below: - x ^ 2 + 10x - 21 = y Line Line Line 1x = (- (10) plus/minus sqrt((10) ^ 2 - 4(- 1) * (- 21)))/(2(- 1)) 2x = (- 10 plus/minus sqrt(100 - 84))/- 2 3x = (- 10 plus/minus sqrt(16))/- 2 Line 4 x= -10 pm sqrt 4 -2 5x = (- 10 plus/minus 2)/- 2 Linedx = (- 10 + 2)/- 2 x = (- 10 - 2)/- 2 x = - 8/- 2 x = - 12/- 2 Line Line 7 Line 8 x = 4 x = 6 Did Luis solve the above function properly ? Justify why or why not and be specific (use the line numbers as reference
Answer:
Sorry try using the math tool.... it looks like a square root sign with a x inside of it! :)
[tex]\sqrt{x}[/tex] <-- pretty much like this one and is at the bottom of your brainly tab :)
It makes things clearer when it comes to these sort of things and eliminates things like, " plus/minus, sqrt, Linedx, 2 Line Line 7 Line 8x = 4x =6
Hope this helps :)
Step-by-step explanation:
Answer:
x = 7, x = 3Steps:
-x²+10x-21 = 0
x = (-10±√(10²-4×(-1)×(-21)))/2×(-1)
x = (-10±√(100-84))/-2
x = (-10±√16)/-2
x = (-10±4)/-2
x = (-10-4)/-2 , x = (-10+4)/-2
x = -14/-2 , x = -6/-2
x = 7 , x = 3
Luis did not solve the equation properly!
Line u has a slope of Line v is parallel to line u. What is the slope of line v? v יל Simplify your answer and write it as a proper fraction, improper fraction, or integer.
Answer:
I have no idea what the answer is because I am in 6th grade but good luck
Step-by-step explanation:
I don't know
Please help I will give brainlist thanks
Answer:
still need help?
Step-by-step explanation:
Find the x and y intercept of this equation: -2x + 8y =4 write your solutions as a point in the form (x,y)
Answer:
8y=4
Step-by-step explanation:
11. Saul's baseball bat has a mass of 1 kilogram His baseball has a mass
of 150 grams. What is the mass in grams of both items combined?
C. 1.150 grams
A. 1.15 grams
D. 115,000 grams
B. 115 grams
the graph shows the height y, in feet, of a balloon that is launched from a platform 13.5 feet high, as a quadratic function of x, the time in seconds. What is the domain of this function in this situation?
Answer:
B) 0<=x<=54
Step-by-step explanation:
The domain of the function is,
0 ≤ x ≤ 54.
What is domain?The collection of all conceivable independent values that a function or relation may take is known as its domain.
Given:
The graph is given in the attached image.
The graph shows the height y, in feet, of a balloon that is launched from a platform 13.5 feet high, as a quadratic function of x, the time in seconds.
The domain of the function is those value where the function is defined.
The domain of the function is,
0 ≤ x ≤ 54.
Therefore, 0 ≤ x ≤ 54 is the domain.
To learn more about the domain;
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What is the area of the triangle?
Answer:
The formula to find a triangle is (L+W)/2
Step-by-step explanation:
Help a brother out pls
I have a f because of this assignment pls help
Answer:
error: "I was a newly caged animal that rushed about"
correction: "I was like a newly caged animal that rushed about"