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3 years ago

Can someone please help me with this

Mathematics

2 answers:

Iteru [2.4K]3 years ago

8 0

The answer is 5 3/4.............

bezimeni [28]3 years ago

5 0

Answer:

Choice C. 5 $\frac{3}{4}$ $feet^{2}$

Step-by-step explanation:

Surface Area

A = 2lw + 2lh + 2wh

l = 2ft

w = $\frac{3}{4}$

h = $\frac{1}{2}$

A = 2(2)( $\frac{3}{4}$ ) + 2(2)( $\frac{1}{2}$ ) + 2( $\frac{3}{4}$ )( $\frac{1}{2}$ )

A = 3 + 2 + $\frac{3}{4}$

A = 5 $\frac{3}{4}$ $feet^{2}$

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3 years ago

Consider the system of equations.

Harman [31]

The solution to the system of equations x + 2y = 1 and -3x-2y = 5 is:

x = -3, y = 2

The given system of equations:

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This can be written in matrix form as shown:

$\left[\begin{array}{ccc}1&2\\-3&-2\end{array}\right] \left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}1\\5\end{array}\right]$

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$\triangle = 1(-2) - 2(-3)\\\triangle = -2+6\\\triangle = 4$

$\triangle_x = \left[\begin{array}{ccc}1&2\\5&-2\end{array}\right]\\\triangle_x = 1(-2)-2(5)\\\triangle_x = -2-10\\\triangle_x =-12$

$\triangle_y = \left[\begin{array}{ccc}1&1\\-3&5\end{array}\right]\\\triangle_y = 1(5)-1(-3)\\\triangle_y = 5 + 3\\\triangle_y =8$

$x = \frac{\triangle_x}{\triangle} \\x = \frac{-12}{4} \\x = -3$

$y = \frac{\triangle_y}{\triangle} \\y = \frac{8}{4} \\y = 2$

The solution to the system of equations x + 2y = 1 and -3x-2y = 5 is:

x = -3, y = 2

Learn more here: brainly.com/question/4428059

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3 years ago

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Answer:

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value = $194.4

Step-by-step explanation:

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73 .6ft³ : X

X : (73.6ft³ × $4.00) ÷ 1ft³

X : $294.4

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