Answer: 24 blue tiles.
Step-by-step explanation:
Initially, the floor is (completely) covered with 64 white tiles.
Now we remove x white tiles, and we replace them with blue tiles.
Then if we removed x white tiles, now the number of white tiles is:
64 - x
And we know that after Rosario finishes the work, there are 40 white tiles left in the floor.
Then:
64 - x = 40
now we can solve this for x.
64 - 40 = x
24 = x
this means that 24 blue tiles were used.
Linear equation is the equation in which the highest power of the unknown variable is 1. Linear equations are used to solve the condition based problems. The number of the blue floor tiles is 24.
Given information-Rosario is working on an 8-foot-by- 8-foot floor.
The floor is covered with 64 white tiles.
Linear equation
Linear equation is the equation in which the highest power of the unknown variable is 1. Linear equations are used to solve the condition based problems.
As she replaces x tiles with blue tiles, therefore the number of the white tiles remain say y,
[tex]y=64-x[/tex] ......1
Suppose the above equation is equation number 1.
Now after she's finished the work, there are 40 white tiles left. This 40 tiles are replaced by the blue tiles. As we had supposed the number of reaming tiles is y and the value of remaining tiles is 40. Thus,
[tex]y=40[/tex]
Put this value of y in the equation 1. Thus,
[tex]40=64-x[/tex]
Solve for x, we get,
[tex]x=64-40\\ x=24[/tex]
Hence the number of the blue floor tiles is 24.
Learn more about the linear equation here;
https://brainly.com/question/11897796
Which of the following equations has 4 as a possible value of z
Answer:
i think you forgot to put your attachment or answer choices
Step-by-step explanation:
you forgot to add answers choices\Step-by-step explanation:
What is the value of x, if 2/5 x = 20?
Answer:
X = 50
Step-by-step explanation:
2/5x = 20
x = 20÷2/5
x = 20 × 5/2
x = 10 × 5
x = 50
Kerry went for a run on Monday and Tuesday. On Monday, Kerry ran 4.7 kilometers. On Tuesday, Kerry ran 3.9 kilometers. How many total meters did Kerry run over the two days?
meters
Answer:
he ran 8600 meters
Step-by-step explanation:
4.7+3.9=8.6
1 kilometer=1000 meters
8.6×1000=8600
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Answer:
Answer:1,200 in²
Step-by-step explanation:
12 in × 10 in × 10 in
The hypotenuse of a triangle measures 20.75 in., and one of the legs measures 17 in, what is the approximate length of the other leg of the triangle?
kenji works at a lab with a huge circular particle accelerator. it has a diameter of 8 kilometers. what is the accelerators radius?
Answer:
radius is 1/2 the diameter. so 8/2= 4 kilometers
How can you tell from a table of values if a relationship is proportional?
A
the line goes through (0,1)
B
In the table, every ratio y/x
is not equal so the relationship is proportional.
C
In the table, every ratio y/x
is equal so the relationship is proportional.
D
the does not go through the origin
What is the measure of
A.70
B.20
C.110
D.140
Answer:
complementary angles sum to 90° 90° - 70° = 20° complementary of 70° is 20°
I Need Help Please ASAP. I have been stuck for more than an hour.
Find the standard deviation of the given data rounded to the nearest hundredth. 147, 141, 120, 124, 128
Janie walks 1 mile to get to a running track.she then runs at a speed of 3.5 miles per hour.Which linear models represents the total distance she ran and walked, d, as a function of t, the time she runs,in hours?
Answer:
d = 3.5t + 1
Step-by-step explanation:
The linear function would have to multiply the speed she runs at the track by the number of hours that she spent running. Then it should add this amount to the 1 mile that she walked to get to the track. If we use the variable d as the total distance that she ran and walked, and the variable t to represent time then we would create the following linear function/model.
d = 3.5t + 1
I HAVE 5 MINUTES HELP ME PLEASE ANSWER THIS AND SHOW UR WORK. HELP YOU GET 50+ BRAINLIEST POINTS AND BRAINLIEST PLEASE SOLVE CORRECTLY AND MAKE SENSE THANKS
Answer:
each taco costs $8 and each soda $4
Step-by-step explanation:
the difference between the two is $16 and half of $16 is $8 so you can tell each taco is $8. That automatically shows that the rest of the cost is $8 which half of is $4
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What is the hypotenuse and how do I get it?
Step-by-step explanation:
by Pythagoras theorem:
perpendicular² + base²= hypotenuse²
(1/√2)²+ (1/√3)² = H²
1/2+1/3= H²
5/6 = H²
√(5/6 )= H
√5/√6 = H
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The question above...
Answer:
Supplementary Angles
Step-by-step explanation:
Two (or more) angles whose
sum is 180°
Decide if the expression is positive or negative. Explain in words how you know, please.
11/-3 and -11/-3
Answer:
The expression is negative
Step-by-step explanation:
11/-3 is negative
-11/-3 is positive
negative + positive or positive + negative = negative
Erica decides to paint the birdhouse. She has a pint of
paint that covers 32.5 ft2 of surface. How can you tell that Kali has
enough paint without calculating?
Answer:
Step-by-step explanation:
If the birdhouse is a cube that is 2 ft on each edge, the surface area is 6×2² = 24 ft². That's a pretty large birdhouse, and it will need about ¾ of a pint of paint.
A total of P60,000 was invested, a portion at 5% and the remainder at 4.5%. The total amount of interest earned was P2,900. How much was invested at each rate?
Answer:
P40000 at 5%
P20000 at 4.5%
I am curious as to what the P stands for. Can you tell me?
Step-by-step explanation:
Let x = amt. invested at 5%
y = amt. invested at 4.5%
(1) x + y = 60000 (2) .05x + .045y = 2900
50x + 45y = 2900000
-45 times (1) -45x - 45y = -2700000
5x = 200000
x = 40000
40000 + y = 60000
y = 20000
P40000 at 5%
P20000 at 4.5%
I am curious as to what the P stands for. Can you tell me?
eight hundred four thousand seventy-3 in standard form
Answer:
1/607645423000
Step-by-step explanation:
Answer:
804,067
Step-by-step explanation:
804,070 - 3 = 804,067
G(r) = 5(r-4), when g(o)
Step-by-step explanation:
G(r) = 5(r-4), when g(o)
= 5(0-4) = -20
7.2.9-T Question Help Here are summary statistics for randomly selected weights of newborn girls: n= 157, x = 33.6 hg, s = 6.2 hg. Construct a confidence interval estimate of the mean. Use a 98% confidence level. Are these results very different from the confidence interval 32.3 hg
Answer:
The 98% confidence interval estimate of the mean is between 32.45 hg and 34.75 hg.
32.3 is not a part of the confidence interval, which means that yes, these results are very different from the confidence interval 32.3 hg
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 - 0.98}{2} = 0.01[/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 - 0.01 = 0.99[/tex], so Z = 2.327.
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.
[tex]M = 2.327\frac{6.2}{\sqrt{157}} = 1.15[/tex]
The lower end of the interval is the sample mean subtracted by M. So it is 33.6 - 1.15 = 32.45 hg
The upper end of the interval is the sample mean added to M. So it is 33.6 + 1.15 = 34.75 hg
The 98% confidence interval estimate of the mean is between 32.45 hg and 34.75 hg.
Are these results very different from the confidence interval 32.3 hg
32.3 is not a part of the confidence interval, which means that yes, these results are very different from the confidence interval 32.3 hg
Question 10
The graph of a function includes the points (4, 5) and (21, 39).
What is the rate of change of the function?
A
2
B
34
с
17
D
0.5
Answer:
Step-by-step explanation:
The rate of change, slope, m is
m=(y2-y1)/(x2-x1), we have points (4,5) and (21,39) so
m=(39-5)/(21-4)
m=34/17
m=2
So the rate of change is 2
Please help me with this
What are the factors of 12z
Is ABC ~ DEF? If so, identify the similarity postulate or theorem that applies
Answer:
C) similar AA
Step-by-step explanation:
Christens Toy Store is selling a hula hoop with a diameter of two feet. What is the hula hoops radius?
Answer:
r = 1 ft
Step-by-step explanation:
Using the formula
d=2r
Solving for
r = d/2 = 2/2 = 1 ft
For the figure below, give the following.
(a) one pair of angles that form a linear pair
(b) one pair of vertical angles
(c) one pair of angles that are supplementary
Answer:
hope it helps you
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which expression is another way to write the expression shown here
5a+ 5b+ 5c+ 5d
5abcd
5a+bcd
5(a+b+c+d
(5a)(5b)(5c)(5d)
Answer:
5(a+b+c+d)
Step-by-step explanation:
this is correct another way of writing this expression
because 5 is common to all and we can put it out
hope it helps
A rectangle has an area of 165 square yards. It has a height of 5 yards. What is its base? (Hint: A ÷h=b)
Use the GCF to factor:
25 + 40
Find the equation containing the points (-1,1) and (4,-9)
A
y = 2x + 1
B
y = -2x - 3
C
y = 2x -3
D
y = -2x -1
Plz help
Answer:
D)
Step-by-step explanation:
Substitute it into equation, for (-1,1): -2*(-1) - 1 = 2 -1 = 1, and -2*4 - 1 = - 8 -1 = -9, so D) is correct.
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