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gayaneshka [121]
2 years ago
9

10.A water tank has strps inside it. A monkey is sitting on topmost floor(i.e.,the first step).The water level is at ninth step.

(iii)If the number of steps moved down is represented by negative integers and the number of steps moved up by positive integers ,represent his moves in part(i) and (ii)by the completing the following;(a) -3 +2 -... = -8 (b) 4-2+...=8 .In (a) the sum (-8)represents going down by eight steps.So,what will the sum 8 in(b) represent . Class-7 math​
Mathematics
1 answer:
Katyanochek1 [597]2 years ago
5 0

Answer:

I am not sure sorry

Step-by-step explanation:

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HELP PLEASE
Lerok [7]

Answer:

A = 81 pi ft^2

Step-by-step explanation:

The area of a circle is found by

A = pi r^2

The radius is 9

A = pi 9^2

A = 81 pi ft^2

8 0
4 years ago
Need help solving, will give brainliest
jeka57 [31]

Answer:

\frac{fx}{h} + f - \frac{f(x)}{h}

Step-by-step explanation:

Tell me if I'm wrong. I got this correct when I did it. but still, tell me if I'm wrong. If I'm correct, mark me brainliest!

5 0
3 years ago
The coordinates of the vertices of △PQR are P(1, 4) , Q(2, 2) , and R(−2, 1) . The coordinates of the vertices of △P′Q′R′ are P′
butalik [34]

<u>ANSWER </u>

The correct answer is option B


<u>EXPLANATION</u>


When we analyse carefully we can see that PQR is mapped on to P'Q'R' by the rule

(x,y)\rightarrow (-x,y)


P(1,4)\rightarrow P'(-1,4)


Q(2,2)\rightarrow Q'(-2,2)


R(-2,1)\rightarrow R'(2,2)


That is to say the <em>x-coordinates</em> are <em>negated</em>. Hence y-axis is the mirror line.


Since reflection is a rigid motion, the two triangles are congruent. That means the two triangles PQR and P'Q'R' are equal in all respect.


See graph in attachment.

5 0
4 years ago
Select the equation that is equivalent to the equation: y-3=2(x+5).
jeyben [28]
Y - 3 = 2(x+5)
y - 3 = 2x + 10
-3 - 10 = 2x - y
-13 = 2x - y

D) 2x - y = -13
6 0
3 years ago
Rachel is bowling with her friends. her bowling ball has a radius of 4 inches. as she bowls she tracks the location of the finge
Goshia [24]

Question Continuation

The finger hole changes by 45 degrees.

Define a function, f, that gives the height of the finger hole above the ground (in inches) in terms of the angle of rotation (measured in radians) it has swept out from the 12 o'clock position.

Answer:

f(θ) = r(1 + cos(θ)) for 0 ≤ θ ≤ π/4

Step-by-step explanation:

Given

Let represent radius

r = 4 inches

Considering that she starts tracking the location when the finger hole is at the 12 o'clock; this means that the angle measurement at this point is 0°.

Let θ represent the angle

At 12 o'clock mark

θ = 0

When the finger hole changes by 45 degrees

θ = 45°

Convert 45° to radians

θ = 45° * π/180

θ = π/4

So, angle θ is such that θ∈[0, π/4]

This can be represented as

0 ≤ θ ≤ π/4

Calculating the measure of f(θ) in polar coordinates

When θ = 0, f(θ) = r (i.e. the current position of the bowl)

When θ = π/2, f(θ) = rcosθ

This is so because f(θ), being the function of the height is a measure of the radius* cos(θ)

Taking measurement of f(θ) from 0 to π/2

f(θ) = r + rcosθ

f(θ) = r(1 + cos(θ))

So, f(θ) = r(1 + cos(θ)) for 0 ≤ θ ≤ π/4

7 0
3 years ago
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