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Reil [10]
3 years ago
8

BRAINLIEST 10 POINTS PLEASE HELP!! LEAVE SMALL EXPLANATION!!!

Mathematics
1 answer:
SpyIntel [72]3 years ago
3 0

Answer:

D

Step-by-step explanation:

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Find the surface area.
denpristay [2]

Step-by-step explanation:

a rectangular prism (like this brick) has the same basic structure as a cube (like a die) : it has 6 sides.

while a die has 6 equal sides, a rectangular prism has 3 pairs of equal sides :

top and bottom

left and right

front and back

all we have to do is calculate the areas of the 6 rectangles and add them up. that's it.

your remember, the area of a rectangle is

length × width

in our case we have

top and bottom : 2.5×11.5 × 2 = 28.75×2 = 57.5 in²

left and right : 2.5×5 × 2 = 12.5×2 = 25 in²

front and back : 11.5×5 × 2 = 57.5×2 = 115 in²

so, the total surface area of the whole block is

57.5 + 25 + 115 = 197.5 in²

5 0
2 years ago
Solve the following system of equations by graphing.
never [62]

Answer:

(x,y)=(3,1)

Step-by-step explanation:

8 0
3 years ago
Read this E[2X^2 â€" Y].
djyliett [7]

Looks like a badly encoded/decoded symbol. It's supposed to be a minus sign, so you're asked to find the expectation of 2<em>X </em>² - <em>Y</em>.

If you don't know how <em>X</em> or <em>Y</em> are distributed, but you know E[<em>X</em> ²] and E[<em>Y</em>], then it's as simple as distributing the expectation over the sum:

E[2<em>X </em>² - <em>Y</em>] = 2 E[<em>X </em>²] - E[<em>Y</em>]

Or, if you're given the expectation and variance of <em>X</em>, you have

Var[<em>X</em>] = E[<em>X</em> ²] - E[<em>X</em>]²

→   E[2<em>X </em>² - <em>Y</em>] = 2 (Var[<em>X</em>] + E[<em>X</em>]²) - E[<em>Y</em>]

Otherwise, you may be given the density function, or joint density, in which case you can determine the expectations by computing an integral or sum.

6 0
3 years ago
Omarie picked x amount of apples, took a break, and then picked v more. Write the expression that models the total number of app
meriva

Answer:

x+v

Step-by-step explanation:

i hope this halps =3

brainliest?

5 0
2 years ago
Can i please have help with this question<br> brainliest for answer
zaharov [31]

Answer:

yes I can help

Step-by-step explanation:

which one please

3 0
2 years ago
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