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ss7ja [257]
3 years ago
11

Please asap maths homework

Mathematics
1 answer:
Nutka1998 [239]3 years ago
6 0

Answer:

77 red marbles

Step-by-step explanation:

the bag has R and B marbles

P(B)=1/12 = number of blue /total number of marbles

so 1/12=?/84

in the bag must be 84/12=7 marbles that are blue

84-7=77 red marbles

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What is the perimeter of the are. Please show work.​
Brilliant_brown [7]

Answer:

p = 633.09 ft

Step-by-step explanation:

The distances of each leg are indicated

Add them to get the perimeter

p = 100 + 89.44 + 186.81 + 120.83 + 136.01

p = 633.09 ft

5 0
3 years ago
The Orchard Cafe has found that about 3% of the diners who make reservations don't show up. If 83 reservations have been made, h
daser333 [38]

Answer:

\mu = 80.51\\\sigma = 1.56

Step-by-step explanation:

We are given the following information in the question:

Percentage of of the diners who make reservations don't show up = 3%

Number of reservations = 83

Thus, we are given a binomial distribution with n = 83 and p = 0.97

X\sim \text{ Binom}(p = 0.97, n = 83)

\mu = np = (83)(0.97) = 80.51

Around 81 people  can be expected to show up.

\sigma = \sqrt{np(1-p)} = \sqrt{(83)(0.97)(1-0.97)} = 1.5541 \approx 1.56

The standard deviation of this distribution is 1.56

6 0
3 years ago
What is the area of the rectangle?
Zolol [24]
Area = lw
So 7(4) =28
Area = 28
The answer is C.
4 0
3 years ago
Write and graph an equation in point slope form of the line that passes through the given point and with the given slope (3,4) m
AnnyKZ [126]
So slope intercept form y=mx+b slope is m

m=6 so
y=6x+b
this is not the legit way but it works so
put in 3 for x and 4 for y and solve for b
4=6(3)+b
4=18+b
-14=b
b=-14

the slope intercep form is y=6x-14
4 0
4 years ago
Explain how you got your answer please :
liraira [26]
X is the number of hours studied, so replace x with 3 in the equation:

y = 6.8(3) + 60
y = 20.4 + 60
y = 80.4

Round down to 80.

The answer would be A.
3 0
3 years ago
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