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makvit [3.9K]
2 years ago
6

Help? ik im dumb but i need good grades and i can risk getting anything wrong

Mathematics
1 answer:
Nookie1986 [14]2 years ago
3 0
85.104 is the answer
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The surface area, S, of a right rectangular prism with length, l, width, w, and height, h can be found using the formula below.
anygoal [31]

Answer:

246 in^2

Step-by-step explanation:

Given data

Length= 8 in

Width= 3 in

Height= 9 in

SA= 2( lw + wh + hl)

substitute

SA= 2(8*3+ 3*9+ 9*8)

SA= 2(24+ 27+72)

SA= 2(123)

SA= 246 in^2

Hence the SA is 246 in^2

4 0
2 years ago
Use the theoretical probability formula to solve the problem. Express the probability as a fraction
serg [7]

Answer:

c. 3 / 13

d. 2 / 13

Step-by-step explanation:

c.

A deck of cards has 52 cards. There are cards of 4 suits- Spades, Hearts, Diamonds and Clubs.

So, there are 52/4= 13 cards of each suit.

Among these 13 cards, there are 3 picture cards or face cards as they are called. These are the Jack, Queen and King cards.

So, the number of total picture cards = 4*3 = 12

the number of cards are 52

theoretical probability formula: P =  favorable events/  possible events

P = 12 / 52

P = 3 / 13

d.

there are four aces and four sevens in the deck

so favorable events = 4 + 4 = 8

possible eventas = 52

P = 8 / 52

P = 2 / 13

4 0
3 years ago
A straight line has equation y=5-3x<br>what is the gradient of the line?<br>​
BARSIC [14]

Answer:

-3

Step-by-step explanation:

1. rearrange so it's in the formula y=mx+C

2. y=-3x+5

y=mx+C

M=gradient

-3=m

gradient= -3

7 0
3 years ago
Find the missing b for a trapezoid with a=68, h=4, b=21
MAVERICK [17]

We will have to use the formula for the area of a trapezoid on this problem, which is (b_1 and b_2 are the bases of the trapezoid and h is the height):

\dfrac{b_1 + b_2}{2} \cdot h


All we need to do is substitute the information we are given into our formula:

\dfrac{21 + b_2}{2} \cdot 4 = 68


Now, let's just simplify the equation:

\dfrac{21 + b_2}{2} \cdot 4 = 68

\dfrac{21 + b_2}{2} = 17

21 + b_2 = 34

b_2 = 13


The missing base has a length of 13 units.

4 0
3 years ago
This is me and I am proud of my 15 year old self
almond37 [142]

Answer:

good

Step-by-step explanation:

thx for the points :)

7 0
2 years ago
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