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nataly862011 [7]
3 years ago
5

What is the surface area of this rectangular pyramid?

Mathematics
1 answer:
zvonat [6]3 years ago
4 0
Pretty sure it’s 670.
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The question is this: Rationalize the denominator and simplify.
Neko [114]

9514 1404 393

Answer:

  \dfrac{20+5\sqrt{3}}{13}

Step-by-step explanation:

Multiply numerator and denominator by the "conjugate" of the denominator.

  \dfrac{5}{4-\sqrt{3}}=\dfrac{5(4+\sqrt{3})}{(4-\sqrt{3})(4+\sqrt{3})}=\dfrac{20+5\sqrt{3}}{4^2-(\sqrt{3})^2}=\boxed{\dfrac{20+5\sqrt{3}}{13}}

__

This is done in different scenarios in order to take advantage of the factoring of the difference of squares. Square root terms and imaginary terms in the denominator can be eliminated in this way.

  a² - b² = (a -b)(a +b)

8 0
3 years ago
The area of a rectangular patio is 27 5 8 square meters. The width of the patio is 3 1 4 meters. What is the length? Enter your
DedPeter [7]

Answer:

Step-by-step explanation:

L and W are length and width, respectively.

W = 3¼ = 13/4

Area = LW = 27⅝ = 221/8 m²

L = area/W = (221/8)/(13/4) = (221/8)(4/13) + 221/26 = 17/2 = 8½ m

8 0
3 years ago
Rewrite the subtraction problem as an addition problem 48 - 60​
NNADVOKAT [17]

Answer:

48-60=  (-48)+60 is a possible answer.

this question can have multiple answers in multiple ways

6 0
3 years ago
Find the values of x and y. 3x - 5 5y - 4 y + 12​
faltersainse [42]
3x - 5 | x = 1.6 repeating
5y - 4 | y = 0.8 or 4/5
y + 12 | y = -12
• I’m sorry if I didn’t understand it correctly

Have a nice day! :)
6 0
3 years ago
Use (a) the Trapezoidal Rule, (b) the Midpoint Rule, and (c) Simpson’s Rule to approximate the given integral
malfutka [58]

Answer:

10.294935

Step-by-step explanation:

i typed numbers

7 0
4 years ago
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