Micky can clean a house in 3 hours. Denise can clean the same house in 9 hours. How long will it take them to clean the house if they work together

Answer:

245 tiles

Step-by-step explanation:

1 meter = 100 cm

Area of bathroom = 3.5m x 2.8m = 350x280 = 9800 cm²

Area of each tile = 20cm x 20cm = 400 cm²

Total number of tiles required = 9800/400 = 245

Note

Strictly speaking we have to find out how many tiles can be fitted in the length and breadth of the bathroom. Since the bathroom is 350 cm wide, we can fit 350/20cm = 17.5 tiles. However, there is no concept of 1/2 tile so the question has an ambiguity. along the width, we can fit 280/10 = 14 tiles

17.5 x 14 = 245 but if the question is reworded to how many tiles do we need to purchase to floor the bathroom it would be 18 x 14 = 252

Answer:

95 to the power of 5

Step-by-step explanation:

Answer:

2. [tex]-2^{3}[/tex]

4. [tex]-1.2^{3}[/tex]

6. [tex]-100n^{3}[/tex]

Step-by-step explanation:

hope this helps and is right!! p.s. i really need brainliest :)

Answer:

B.

Step-by-step explanation:

b is the correct answer

The simplified form of the given algebraic expression will be 13/8 x - 5/6.

Finding the least common multiples of the denominator expressions can help.

Then using the similar method as we use in the sum of fractions would give the sum of algebraic fractions.

For example,

[tex]\dfrac{a}b} + \dfrac{c}{d} = \dfrac{a \times d + c \times b}{bd}[/tex]

We have the given algebraic expression. we need to simplify the expression.

[tex]\dfrac{3}{4}x -\dfrac{1}{3} +\dfrac{7}{8} x-\dfrac{1}{2} \\\\\\\dfrac{3}{4}x +\dfrac{7}{8} x-\dfrac{1}{3} -\dfrac{1}{2} \\\\\\\dfrac{(6+7)}{8} x - \dfrac{(2+3)}{6} \\\\\\\dfrac{13}{8} x - \dfrac{5}{6}[/tex]

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Answer: 9/25 or 36%

Step-by-step explanation:

The first time it is a probability of 3/5, and the second blue also has a prbability of 3/5. Multiply them together since it is an "and" situation, and you get 9/25. Or, in percentages, it is 60% * 60%, or 0.6 * 0.6, which is 36% or 0.36. Hope this helps!

Answer:

the correct answer is 36%

Step-by-step explanation:

I got it right on Edmentum

Hook me up with a 5 star and a thanks :)

Answer:

The interior angles add up to 1440 degrees, and the exterior angles add up to 360 degrees.

Step-by-step explanation:

Search "angle of a decagon"

Answer:

it's estimated that 750 students in the whole school dislike the 8:30am start time.

Step-by-step explanation:

Since 30 of the 40 students said "no", it means 30/40, or 3/4 of the random sample disliked the 8:30am start time. Multiply this by the whole population: 1,000 × (3/4) = 750.

Another way to check this is using 10/40 = .25 and doing 1000x.25 = 250 (the amount of students who liked it). Then subtract from whole population and it's 750.

Answer:

C

Step-by-step explanation:

A is wrong because 10 is not prime

B is wrong because still above^^

D is wrong because diagonals of a rhombus are not congruent.

So C is correct

Answer:

△JKL is not congruent to △J′K′L′ because there is no sequence of rigid motions that maps △JKL to △J′K′L′.

Step-by-step explanation:

If L' were (-3,-4), it would be a reflection of L across the x-axis as J' and K' are with respect to J and K. Unfortunately, because it is not, the side lengths J'L' and K'L' of triangle J'K'L' are different from those of triangle JKL. This ensures the triangles JKL and J'K'L' are not congruent.

- Jackson

Answer:

The answer to the question is 20.55.

Answer:

20.55

Step-by-step explanation:

1 Simplify 68.5/100 to  0.685.

0.685×30

2 Simplify.

20.55

Answer:

D low all year long because it doesn't snow in Florida

Step-by-step explanation:

Answer:

D. Low all year long

Step-by-step explanation:

It rarely snows in Florida, even in northern Florida.

Nitrogen, Helium, Hydrogen

C,B,A

Answer:

(1,5)

(-1,3)

Step-by-step explanation:

The solution is in the image

Answer:

1 kg of mushrooms costs £2.7.

Step-by-step explanation:

Step 1: Write equations.

Let a be the cost of apples per kg and m the cost of mushrooms per kg.

First equation: Ibrar buys 3 kg of apples. He also buys 0.4 kg of mushrooms. The total cost is £6.93.

[tex]3a + 0.4m = 6.93[/tex]

Second equation: 1 kg of apples cost £1.95.

[tex]a = 1.95[/tex]

Step 2: Solve the system of equations.

1) [tex]3a + 0.4m = 6.93[/tex]

2) [tex]a = 1.95[/tex]

Substitute a in the first equation with a from second.

[tex]3a + 0.4m = 6.93\\3(1.95) + 0.4m = 6.93[/tex]

Solve for m.

[tex]5.85 + 0.4m = 6.93\\0.4m = 6.93 - 5.85 \\0.4m = 1.08\\m = \frac{1.08}{0.4}\\m = \text{\£}2.7[/tex]

The cost of 1 kg of mushrooms is £2.7.

Two or more expressions with an Equal sign is called as Equation.

Given that Ibrar buys 3kg of apples

Ibrar buys 0.4kg of mushrooms.

The total cost is £6.93

3x+0.4y=6.93...(*)

1kg of apples cost is £1.95

x=1.95

Substitute the value of x in *

3(1.95)+0.4y=6.93

5.85+0.4y=6.93

Subtract 5.85 on both sides

0.4y=6.93-5.85

0.4y=1.08

Divide both sides by 0.4

y=2.7

Hence, the cost of 1 kg of mushrooms is £2.7.

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Answer:

Multiply to remove the fraction, then set equal to 0 and solve.

Exact Form: y = − 1/10

Decimal Form: y = − 0.1

Step-by-step explanation:

Answer:

y = -1/10 or -0.1

Step-by-step explanation:

Multiply both sides of the equation by 100.

To find the opposite of 5y−17, find the opposite of each term.

The opposite of −17 is 17.

Combine 155y and −5y to get 150y.

Subtract 17 from both sides.

Subtract 17 from 2 to get −15.

Divide both sides by 150.

​Reduce the fraction  

​ to lowest terms by extracting and canceling out 15.

Answer:

58 more ml

Step-by-step explanation:

147-89=58 ml.

Answer:

The factor of 12x^2 + 16 is 4x (3x+4)

Answer:

the graph is shifted up 9, compressed by a factor of 2

Step-by-step explanation:

General form of an absolute value equation:

f(x)= a|x - h| + k

The variable a tells us how far the graph stretches vertically, and whether the graph opens up or down. The variables h tell us how far the graph shifts horizontally and vertically.

parent function f(x) = |x|,  

the translation of the function g(x) = 2|x| + 9 from the parent function.

- the +9 shift the graph up 9

- the 2 compresses the graph

Answer:

C

Step-by-step explanation:

There are nine lines between 0 and 1

The line the red dot is on is 0.9

Answer:

16

Step-by-step explanation:

10*2 = 20

8*2 = 16

Answer:

45 degree ange slice

Step-by-step explanation:

Answer:

Step-by-step explanation:

Discussion

The form of this root is a "mirror image" of the root that is given. They come in pairs.

So the exact value of the other root is

x = - 2 + √6

You should be very careful looking at this root. The only  difference is the plus sign where the minus sign used to be.

The given root has to be of the form a rational number ± an irrational number.

Later on, when you get into higher math classes, you will find there is another kind of number that this same rule applies to.

Answer:

B po I'm sure that's is answer thank you

slope is

9-(-1)/-2-3

10/(-5)

=-2

slope is -2

[tex]\rule{300}{1}\\\dashrightarrow\large\blue\textsf{\textbf{\underline{Given question:-}}}[/tex]

     What is the slope of the line containing (-2, 9) and (3, -1)?

[tex]\dashrightarrow\large\textsf{\textbf{\underline{Answer and how to solve:-}}}[/tex]

We can find the slope using the following formula:-

[tex]\boxed{\frac{y_2-y_1}{x_2-x_1}}[/tex]

[tex]\bigstar[/tex] substitute the numbers in lieu of the letters:-

[tex]\boxed{\frac{-1-9}{3-(-2)}}[/tex]

[tex]\dagger[/tex] On simplification,

[tex]\boxed{\frac{-10}{3+2}}[/tex]

[tex]\dagger[/tex] On further simplification,

[tex]\boxed{\frac{-10}{5}}[/tex]

[tex]\dagger[/tex] Which simplifies to

[tex]\boxed{Slope=-2}[/tex]

[tex]\rule{300}{1}[/tex]

If the average rate of change is 18, then the value of the x is √(13/5). Then the correct option is B.

It's an average of how far the functions changed per unit throughout that time period.

Let f be the function given by f(x) = x³ + 5x.

Then the value in the closed interval [1,3] will be

The instantaneous rate of change will be

[tex]f'(x) = 3x ^2 + 5[/tex]

Then the average rate of change will be

[tex]= \dfrac{f(3) - f(1)}{3-1} \\\\= \dfrac{(3^3 + 5\times 3) - (1^3 + 5 \times 1)}{3-1}\\\\= 18[/tex]

Then we have

3x² + 5 = 18

Then the value of x will be

[tex]\begin{aligned} \rm 3x^2 + 5 &= 18\\\\\rm x &= \sqrt{\dfrac{13}{3}} \end{aligned}[/tex]

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Answer:

b

Step-by-step explanation:

...

Answer:

C - no association

Step-by-step explanation:

The data isn't linked/following a general trend.