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myrzilka [38]
3 years ago
9

Which of the following is true about the expression below?

Mathematics
1 answer:
agasfer [191]3 years ago
8 0
Answer:

The first one

Explanation:

9 and 1/4 are both rational numbers (which are numbers that can be represented in a fraction; 9 can be represented as 9/1)
And since it equals to 9/4 (or 2 1/4) the product is also a rational number.
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Find surface area please
Lilit [14]

Answer:

131.88 cm²

Step-by-step explanation:

The surface area of a cylinder is 2πr² + 2πrh

Since the figure we are dealing here is a quarter of a cylinder, divide the equation by 4.

New equation =

\frac{2\pi r^{2}+2\pi  rh}{4}

We know:

r = 6 cm

h = 8 cm

Now substitute the values and solve:

\frac{2(3.14)(6)^{2} +2(3.14)(6)(8)}{4}

\frac{226.08+301.44}{4}

\frac{527.52}{4}

= 131.88 cm²

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3 years ago
A 6 ft board is cut into two pieces, on twice as long as the other. How long are the pieces?
disa [49]

Answer:One is 2 feet and one is 4 feet

Step-by-step explanation:

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3 years ago
The vertices of triangle RST are R (-7, 5), S(17, 5), T(5, 0). What is the perimeter of triangle RST?
MaRussiya [10]

~\hfill \stackrel{\textit{\large distance between 2 points}}{d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2}}~\hfill~ \\\\[-0.35em] ~\dotfill\\\\ R(\stackrel{x_1}{-7}~,~\stackrel{y_1}{5})\qquad S(\stackrel{x_2}{17}~,~\stackrel{y_2}{5}) ~\hfill RS=\sqrt{(~~ 17- (-7)~~)^2 + (~~ 5- 5~~)^2} \\\\\\ ~\hfill RS=\sqrt{( 24)^2 + ( 0)^2}\implies \boxed{RS=24} \\\\\\ S(\stackrel{x_1}{17}~,~\stackrel{y_1}{5})\qquad T(\stackrel{x_2}{5}~,~\stackrel{y_2}{0}) ~\hfill ST=\sqrt{(~~ 5- 17~~)^2 + (~~ 0- 5~~)^2}

~\hfill ST=\sqrt{( -12)^2 + ( -5)^2}\implies \boxed{ST=13} \\\\\\ T(\stackrel{x_1}{5}~,~\stackrel{y_1}{0})\qquad R(\stackrel{x_2}{-7}~,~\stackrel{y_2}{5}) ~\hfill TR=\sqrt{(~~ -7- 5~~)^2 + (~~ 5- 0~~)^2} \\\\\\ ~\hfill TR=\sqrt{( -12)^2 + (5)^2}\implies \boxed{TR=13} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill \stackrel{\textit{\LARGE perimeter}}{24~~ + ~~13~~ + ~~13\implies \text{\LARGE 50}}~\hfill

3 0
2 years ago
What is the answer to the math question ?
RUDIKE [14]

Answer:

142 square ft

Step-by-step explanation:

the formula is ;

2(lw+lh + wh)

4 0
3 years ago
If mc= xm<3=40 and m<4 =5x+14 what is m<1
stealth61 [152]
The answer is mind blown.
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