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2 years ago

Is 2+7–8 and 8+7–2 equivalent? If so name the property. If not explain why

Mathematics

1 answer:

34kurt2 years ago

4 0

Answer: no

Step-by-step explanation:

If 2+7=9 then u subtract 8 that gives you 1 and 8+7=15 subtract 2 thats gives you 13

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What is the area of the circle whose equation is (x − 9)2 + (y − 3)2 = 64?

aalyn [17]

(x-xo)²+(y-yo)²=r²
(x-9)²+(y-3)²=64
r²=64
Area of a circle=πr²=3.14×64=200.96

7 0

2 years ago

A golfer hits an errant tee shot that lands in the rough. A marker in the center of the fairway is 150 yards from the center of

Gwar [14]

$\bold{\huge{\underline{ Solution}}}$

<h3>Given :-</h3>

A marker in the center of the fairway is 150 yards away from the centre of the green
While standing on the marker and facing the green, the golfer turns 100° towards his ball
Then he peces off 30 yards to his ball

We have to find the distance between the golf ball and the center of the green .

<h3>Let's Begin :-</h3>

Let assume that the distance between the golf ball and central of green is x

Here, 

Distance between marker and centre of green is 150 yards
That is, Height = 150 yards
For facing the green , The golfer turns 100° towards his ball
That is, Angle = 100°
The golfer peces off 30 yards to his ball
That is, Base = 30 yards

According to the law of cosine :-

$\bold{\red{ a^{2} = b^{2} + c^{2} - 2ABcos}}{\bold{\red{\theta}}}$

Here, a = perpendicular height
b = base
c = hypotenuse
cos theta = Angle of cosine

So, For Hypotenuse law of cosine will be :-

$\sf{ c^{2} = a^{2} + b^{2} - 2ABcos}{\sf{\theta}}$

Subsitute the required values,

$\sf{ x^{2} = (150)^{2} + (30)^{2} - 2(150)(30)cos}{\sf{100°}}$

$\sf{ x^{2} = 22500 + 900 - 900cos}{\sf{\times{\dfrac{5π}{9}}}}$

$\sf{ x^{2} = 22500 + 900 - 900( - 0.174)}$

$\sf{ x^{2} = 22500 + 900 + 156.6}$

$\sf{ x^{2} = 23556.6}$

$\bold{ x = 153.48\: yards }$

Hence, The distance between the ball and the center of green is 153.48 or 153.5 yards

5 0

1 year ago

I NEED HELP PLEASE !!!

Elis [28]

Answer:

the first one

Step-by-step explanation:

m=10 n=1

10+1 =11

10 x 1=10

3 0

2 years ago

Read 2 more answers

What is the denominator for 1/6

zvonat [6]

Answer:

Step-by-step explanation:

It is the bottom number, demoninator.

8 0

2 years ago

Read 2 more answers

identify any outliers in the table. and describe the association between the altitude and the temperature using the table above.

serg [7]

Answer:

-68 could be a potential outlier, but other than that, the data seems pretty steady.

The association between the altitude and the temperature is the higher up in the atmosphere you are, the colder it gets.

6 0

2 years ago