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3 years ago

What is 81 divided by 9

Mathematics

2 answers:

poizon [28]3 years ago

8 0

9x9 = 81

Therefore, 81 ÷ 9 is 9

Anna35 [415]3 years ago

6 0

Answer:

Step-by-step explanation:

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In what ratio does the points (2,-5) divide the line segment A(-3,5) and B(4,-9)

Strike441 [17]

Your question has been heard loud and clear.

let the ratio be m:n

From section formula

(-3n + 4m)/(m+n) = 2

-3n + 4m = 2m+2n

5n = 2m

m/n = 5/2

m:n = 5:2

5 0

4 years ago

Circumfrance of a circle, (Show working)

Ronch [10]

Answer:

25.1cm

Step-by-step explanation:

C=2πr

here radius, r=4 cm and π=3.142

Put values in formula.

C=2(3.142)(4)

C=25.1 cm (Rounded to 1 decimal place)

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3 years ago

Read 2 more answers

A football is kicked toward an end zone with an initial vertical velocity of 30 ft/s. The function h(t) = -16+ 30t models the he

Ulleksa [173]

Answer:

A. The football does not reach a height of 15ft

Step-by-step explanation:

Given

$h(t) = -16t^2 + 30t$

Required

Determine which of the options is true

The option illustrates the height reached by the ball.

To solve this, we make use of maximum of a function

For a function f(x)

Such that:

$f(x) = ax^2 + bx + c$ :

$f(\frac{-b}{2a}) = maximum/minimum$

i.e we first solve for $\frac{-b}{2a}$

Then substitute $\frac{-b}{2a}$ for x in $f(x) = ax^2 + bx + c$

In our case:

First we need to solve $\frac{-b}{2a}$

Then substitute $\frac{-b}{2a}$ for t in $h(t) = -16t^2 + 30t$

By comparison:

$b = 30$

$c = -16$

$\frac{-b}{2a} = \frac{-30}{2 * -16}$

$\frac{-b}{2a} = \frac{-30}{-32}$

$\frac{-b}{2a} = \frac{30}{32}$

$\frac{-b}{2a} = \frac{15}{16}$

Substitute $\frac{15}{16}$ for t in $h(t) = -16t^2 + 30t$

$h(\frac{15}{16}) = -16(\frac{15}{16})^2 + 30(\frac{15}{16})$

$h(\frac{15}{16}) = -16(\frac{225}{256}) + \frac{450}{16}$

$h(\frac{15}{16}) = -(\frac{225}{16}) + \frac{450}{16}$

$h(\frac{15}{16}) = \frac{-225 + 450}{16}$

$h(\frac{15}{16}) = \frac{225}{16}$

$h(\frac{15}{16}) = 14.0625$

This implies that the maximum height reached is 14.0625ft.

So, the option that answers the question is A because $14.0625 < 15$

8 0

3 years ago

Is 2x+4+3(2x-1) equivalent to 8x-2

almond37 [142]

Answer: 2x+4+3(2x-1) is not equivalent to 8x-2. it is equivalent to 8x+1

Step by step solution:

Step 1 :

Equation at the end of step 1 :

(2x + 4) + 3 • (2x - 1)

Step 2 :

Final result :

8x + 1

3 0

4 years ago

What is the quotient of -5/7 ÷ 2/35

Alex17521 [72]

Answer:12.5

Step-by-step explanation:there you go

6 0

4 years ago

What is 81 divided by 9​

What is 81 divided by 9