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3 years ago

Which of the following is true about the expression below?

1 answer:

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

4 0

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:

8 0

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.

7 0

3 years ago