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Tasya [4]
3 years ago
6

Plssssss helppppppppp

Mathematics
1 answer:
madam [21]3 years ago
7 0

Answer:

1,385.44 {ft}^{2}

<h3>4th answer is correct</h3>

Step-by-step explanation:

\pi {r}^{2}  \\ \pi \times 21 \times 21 \\  = 1,385.44 {ft}^{2}

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The time, t, required to drive to a certain distance varies inversely with the speed, r. if it takes 12 hours to drive the dista
kap26 [50]
T = k/R  where k is the constant of variation, T=time and R=speed.
Plug in the given values:-
12 = k/60
k = 12*60 = 720
So the equation of variation is T = 720/R

At 85 mph we have

T = 720 / 85 =  8.47 hours (answer)

8 0
3 years ago
david is buying a cheese wheel priced at $650 before tax. the store charges 8% sales tax. what is the total price including tax,
Marina CMI [18]
I think he pays $702.

Basically,

650 • .08 (move the decimal over two to the left, that’s what you get) = 52. Then I did 650 + 52 and got $702.
6 0
3 years ago
You are installing a wood fence. The fence is 120 feet long. East wood slat to be installed vertically, is 3 3/4 inches wide. Wh
ddd [48]
3 3/4 inches = (3 3/4 / 12) feet = 0.3125 feet
120 feet requires  ------- x number of board.

120 feet/0.3125 feet / board = 384 boards.

1 board costs 1.40 
384 boards cost x

1.4 * 384.00= x*1 = x
537.60 dollars.

Note if you need to do this by dimensional analysis, it will look like this.

120 feet/fence [ 1 board / 3.75 inches] [ 12 inches/foot] [1.40 dollars / board]

All units that can be cancelled should be.
The result is 537.6 dollars / fence which is the answer you got. 

3 0
3 years ago
Write the point-slope form of the equation of the line passing through the points (-5, 6) and (0, 1).
Y_Kistochka [10]
The point slope form:
y - y_1 = m(x - x_1)

We need to find the slope. To find the slope we can use the following formula:
\frac{y_2 - y_1}{x_2 - X_1}

Use the points <span>(-5, 6) and (0, 1) and plug it into our slope formula and solve:
</span>\frac{1 - 6}{0 - (-5)}
\frac{-5}{5} = -1

So our slope is -1 which means m = slope = -1 
Now that we have our slope lets create the point slope form

Our point slope form equation is y - y_1 = m(x - x_1) Remember 
m = slope = -1. Also, we are going to use the point (-5,6).

First insert the m = slope = -1 number where m is located
y - y_1 = -1(x - x_1)

Next, insert the -5 from (-5,6) where x_1 is located and the 6 from (-5,6) where y_1 is located.
y - y_1 = -1(x - x_1)
y - 6 = -1(x - (-5))
Now simplify 
y - 6 = -1(x - (-5))
y - 6 = -1(x +5) <-------Answer





8 0
4 years ago
How can I find an equivalent fraction for 84/100
Nostrana [21]

Answer:

Divide both the numerator and denominator by the GCD

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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