A school janitor has my 1/3 of the classroom in five minutes at what rate is he mopping

The time when the ball hit the ground, which is thrown from a height of 70 meters with an initial downward velocity of 10 m/s is 2.87.

A quadratic equation is the equation in which the unknown variable is one and the highest power of the unknown variable is two.

The standard form of the quadratic equation is,

[tex]ax^2+bx+c=0[/tex]

Here,(a,b, c) is the real numbers and (x) is the variable. To solve the equation for x, use the following formula,

[tex]x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]

The ball's height h (in meters) after t seconds is given by the following.

[tex]h=70-10t-5t^2[/tex]

The ball is thrown from a height of 70 meters with an initial downward velocity of 10 m/s. In this case,

The time when the ball hit the ground has to be find out. The value of the height when it hit the group is zero. Put the value of h=0 in the above equation,

[tex]h=70-10t-5t^2\\0=70-10t-5t^2\\5t^2+10t-70=0\\5t^2+10t-70=0\\[/tex]

Solve the quadratic equation using the following formula,

[tex]t=\dfrac{-10\pm \sqrt{10^2-4(10)(-70)}}{2\times5}\\t=-4.87, t=2.87[/tex]

Consider positive value. Thus, the time when the ball hit the ground, which is thrown from a height of 70 meters with an initial downward velocity of 10 m/s is 2.87.

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Answer:

It would be -[tex]\frac{1}{2}[/tex]

Step-by-step explanation:

Use the slope formula to find the slope  m.

Answer:

40

Step-by-step explanation:

Answer:

she should at least have $1,150 in at least 575 weeks

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

(3^2x5)^3=91125

3^6x5^3=91125

The answer is 9 3⁶ x 5³

(3² x 5)³= 91125

3⁶ x 5³ = 91125

Answer:

9 apples.

Step-by-step explanation:

27/3=9

Answer:

i sorry but idk the annswer

Answer:

240

Step-by-step explanation:

200/25=8

30x8=240

hope this helps i didn't really understand the question much

Answer:

-0.86

Step-by-step explanation:

12x + 9 = 2x - 15 + 5x + 2

Combine

19x = -22

Answer:

164.316767252

Step-by-step explanation:

Answer:

164

Step-by-step explanation:

Answer:

Slope: 5

X Intercept: (8.2,0)

Y Intercept: (0, -41)

Step-by-step explanation:

Slope:

y2-y1/x2-x1=9-(-6)/10-7=9+6/10-7=15/3=5

y=5x-41 - the slope intercept form

X Intercept:

if y=0

0=5x-41

+41  +41

41=5x

8.2=x

(8.2,0)

Y Intercept:

if x=0

y=-41

(0,-41)

hope this helps

brainliest?

Answer:

See below

Step-by-step explanation:

Given formula

Year 2005, finding number of trout

Year 2010, finding number of trout

Year 2015, finding number of trout

Number of trout is trending up with significant increase over yeas

Answer:

Step-by-step explanation:

Number of trout in 2005.

Find the number of years apart from 2000 to 2005.

2005 - 2000 = 5

Substitute for x and solve for y.

y = x² + 3x + 2

y = (5)² + 3(5) + 2

y = 25 + 15 + 2

y = 40 + 2

y = 42 million

Number of trout in 2010.

Find the number of years apart from 2000 to 2010.

2010 - 2000 = 10

Substitute for x and solve for y.

y = x² + 3x + 2

y = (10)² + 3(10) + 2

y = 100 + 30 + 2

y = 130 + 2

y = 132 million

Number if trout in 2015.

Find the number of years apart from 2000 to 2015.

2015 - 2000 = 15

Substitute for x and solve for y.

y = x² + 3x + 2

y = (15)² + 3(15) + 2

y = 225 + 45 + 2

y = 270 + 2

y = 272 million

Best of Luck!

Answer:

The midpoint is ( -2.5, 6.5)

Step-by-step explanation:

To find the x coordinate of the midpoint, add the x coordinates of the endpoints and divide by 2

(-2+-3)/2 = -5/2 = -2.5

To find the y coordinate of the midpoint, add the y coordinates of the endpoints and divide by 2

(6+7)/2 = 13/2 = 6.5

The midpoint is ( -2.5, 6.5)

Answer: 22

Step-by-step explanation:

Answer:

22

Step-by-step explanation:

Don't worry, don't worry child. Oh, geometry. How lucky are you: finally knowing this treasury of humanity. I'm jealous now. Haha.

In the annex, you can see what is happening :)

Look that, if a and b are paralels, 4x + 28 is External Alternate of the Opposite Vertex of 116, which is also 116. Then, they have the same value: 4x + 28 = 116.

If you don't remember those concepts, review the initial part of geometry. The proof of that is quite simply, moreover is easy to mentally deduce that.

Answer:

-17

Step-by-step explanation:

You have to simplify the expression!

Answer:

-17

Step-by-step explanation:

Answer:

32 ounces

Step-by-step explanation:

1 lb = 16 ounces

2 lbs = 2 * 16 = 32 ounces

Answer:

c is incorrect they just made me fail my quiz... :(

Step-by-step explanation:

Answer:

7/10 divided by 1/10

Step-by-step explanation:

Answer:

98,000 bacteria.

Step-by-step explanation:

We are given the formula:

[tex]P=le^{kt}[/tex]

Where l is the initial population, k is the rate of growth, and t is the time ( in hours).

We know that it has an initial population of 500. So, l is 500.

We also know that the population grows to 7000 after 2 hours.

And we want to find the population after 4 hours.

First, since we know that the population grows to 7000 after 2 hours, let's substitute 2 for t and 7000 for P. Let's also substitute 500 for l. This yields:

[tex]7000=500e^{2k}[/tex]

Divide both sides by 500:

[tex]e^{2k}=14[/tex]

We can solve for the rate k here, but this is not necessary. In fact, when can find our solution with just this.

Let's go back to our original equation. We want to find the population after 4 hours. So, substitute 4 for t:

[tex]P=500e^{4k}[/tex]

We want to find the total population, P. Notice that we can rewrite our exponent as:

[tex]P=500(e^{2k})^2[/tex]

This is the exact same thing we acquired earlier. So, we know that the expression within the parentheses is 14. Substitute:

[tex]P=500(14)^2[/tex]

Square and multiply:

[tex]P=500(196)=98000[/tex]

So, after 4 hours, there will be 98,000 bacteria.

And we're done!

Answer:

A

Step-by-step explanation:

Answer: Rational

Step-by-step explanation:

21[tex]\pi[/tex] is rational because it is [tex]\pi[/tex] times 21 which is 65.9734457254 and numbers that terminate or repeat are rational.

Answer:

6.16.

Step-by-step explanation:

hope this helps.

Answer:

37/6

Step-by-step explanation:

Answer:

x= -3 is the answer

UW=3 is the answer..

hope it helps you mate

please mark me as brainliast

Answer:

From the given figure, we can see that the 2 given line segments are equal in length

Hence,

11 + (x - 5) = 2x - 4

6 + 4 = x

x = 10

Now that we know the value of x, we can use it to get the length of the line segment UW

UW = 11 + (x - 5)

UW = 11 + (10 - 5)

UW = 11 + 5

UW = 16 units

Answer:

The value of ending inventory will be items of latest purchase.

Step-by-step explanation:

Given that,

Lisa Company uses the periodic inventory system to account for inventories.

Information related to Lisa Company's inventory at October 31 is given,

Suppose, find the value of ending inventory using the FIFO cost assumption if 500 units remains on hand at october 31

We need to calculate the value of ending inventory

Using FIFO method

[tex]value\ of\ ending\ inventory =305\ units\times\$10.6+195\ units\times\$11.60[/tex]

[tex]value\ of\ ending\ inventory = 3233+2262[/tex]

[tex]value\ of\ ending\ inventory =\$5495[/tex]

Hence, The value of ending inventory will be items of latest purchase.

Answer:

2.93

Step-by-step explanation:

3.15×7/100=0.2205

3.15-0.2205=2.9295

The cost of the jeans before tax $2.9295

"It is a number or ratio that can be expressed as a fraction of 100."

For given example,

Let 'a' be the original price of the jeans.

Let 'b' be the price of the jeans with tax.

then, b = a + tax

Juan paid $3.15 in tax for the jeans.

The sales tax on a pair of jeans is 7 percent.

First we find the tax on a pair of jeans.

⇒ tax = b × 7%

⇒ tax = 3.15 × (7/100)

⇒ tax = $0.2205

We need to find the cost of the jeans before tax.

Here, b = $3.15, tax amount = $0.2205

⇒ b = a + 0.2205

⇒ 3.15 = a + 0.2205

⇒ a = 3.15 - 0.2205

⇒ a = $2.9295

Therefore, the cost of the jeans before tax $2.9295

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Answer:

Divide by P

Step-by-step explanation:

i = P x M

divide by P to get M alone, which means you have to do it to both sides

i/P = M

Answer:12

Step-by-step explanation:

The prime factorization of 84 is 2×2×3×7 . The prime factorization of 48 is 2×2×2×2×3 . . Therefore, the GCF is 2×2×3=12

Regression equations can be linear, quadratic or exponential

The graph that would most likely be associated with the given model is (b)

The regression equation is given as:

[tex]n(t) = 3.53t^2 - 33.04t + 117.56[/tex]

The above regression equation is a quadratic function (and non-linear).

So, the graph must represent a non-linear relationship.

From the given graphs, only graph (b) represents a quadratic function.

Other options are either linear models or exponential.

Hence, the graph that would most likely be associated with the given model is (b)

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Answer:

Its B

Step-by-step explanation:

Answer:

5(y - 2)

Step-by-step explanation:

What is the GCF (Greatest Common Factor) for 5y and -10? It is 5 so you take  5 out of 5y and 5 out of -10. You put the 5 outside of the parentheses and put y - 2 inside of the parentheses. That is how you factorize 5y - 10

The factorized form of 5y - 10 is 5(y - 2).

Factorization in mathematics is the process of dividing a large number into smaller ones that when multiplied together, give you the original number. Factorization is the process of dividing a number into its components or divisors.

When we are asked to factorize an expression, we are essentially trying to write the expression as a product of simpler expressions. In this case, we want to write 5y - 10 as a product of simpler expressions.

One way to approach this is to look for a common factor that is present in both terms of the expression.

In this case, we can see that both 5y and 10 are divisible by 5. Therefore, we can factor out the greatest common factor of the two terms, which is 5.

When we factor out 5 from 5y and -10, we are left with:

5y - 10 = 5(y - 2).

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Answer:

The days will it take the store to make $50,000 in a whole number are:

Step-by-step explanation:

Remember that x represents the number of days, so, you must replace different values in the formula until you obtain a value of $50,000, in this form:

So, I'll show you that the value that you need is 30 in a whole number.

I know that the value exceeds the amount of $50,000, but if you use just a day before:

How you can see, if you use 29 days, the value doesn't reach $50,000, by this reason, you must use 30 days to reach it.