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3 years ago

Can someone plz help for brainliest

Mathematics

2 answers:

Anni [7]3 years ago

8 0

Answer:

5.4 * 10^5

Step-by-step explanation:

We are multiplying to find this one.

Each second 15000 gallons of water flows.

There are 3600 seconds in an hour

15000 * 3600 = 54000000

54000000 in scientific notation is 5.4 * 10^5

sashaice [31]3 years ago

4 0

Answer: part 1 multiplying part 2 the answer is 15000 but I don't know what scientific notation means tell me in comments

Step-by-step explanation:

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Find the unit rate A fertilizer covers 5/6 square foot in 1/4 hour

Norma-Jean [14]

Answer:

$3.33 ft^2 per hour$

Step-by-step explanation:

5/6ftsq = 1/4h (multiply by 4 on each side to make the hours 1)

20/6ftsq=1h

3.33ftsq=1h

$3.33 ft^2 per hour$

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3 years ago

What are three intergers all less than 25 and a range of 10 and mean of 13

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Answer:

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Step-by-step explanation:

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2 years ago

Which expression has a value of 36 when x=4 and y=7

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Ur answer is B 2x 4y hope its right

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3 years ago

if a rectangle have length of 10 inches and width of 8 inches what is the new area if each corner is cut by x^2

Natali5045456 [20]

Answer:

$80 - 4x^2$

Step-by-step explanation:

Area of a rectangle

A rectangle of width W and length L has an area of:

A = W.L

The given rectangle has a length of L=10 inches and a width of W=8 inches, thus its area is:

A = 8*10 = 80

$A = 80\ in^2$

If each corner is cut by a square of x*x, then the total area will be:

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The new area is $\mathbf{80 - 4x^2}$ square inches

5 0

3 years ago

Extended Problems, Extraneous Solutions

diamong [38]

Answer:

1a. 2 is the solution

1b. -3 is because square root of 1 doesn't equal -1.

1c.-3

Step-by-step explanation:

$(x + 2 = \sqrt{3x + 10}$

Square both sides

$(x + 2) {}^{2} = 3x + 10$

Remeber perfect square Rule

$(x + y) {}^{2} = {x}^{2} + 2xy + {y}^{2}$

So now we got

$x {}^{2} + 4x + 4 = 3x + 10$

${x}^{2} + x + 4 = 10$

${x}^{2} + x - 6 = 0$

Factor into binomial.

$(x + 3)(x - 2) = 0$

So our solution is 3 or 2. However, let's check our work.

$- 3 + 2 = \sqrt{3( - 3) + 10}$

$- 1 = \sqrt{1}$

However square root of 1 is 1. It could be 1 but in Math, We only take the principal square root which is positive always. So -3 isn't a solution.

So let try 2.

 $2 + 2 = \sqrt{3(2) + 10} = 4 = \sqrt{16} = 4 = 4$ 

So this is indeed the solution.

Make up equation for 2 and 3. Ask me if you need help.

5 0

2 years ago