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vovikov84 [41]
3 years ago
8

Kyra observed that 85% of the students at a library liked reading mystery stories. If 30 students at the library did not like re

ading mystery stories, the number of students at the library who liked mystery stories was _____. (only put numeric values, no other symbols).
Mathematics
1 answer:
Yanka [14]3 years ago
5 0

Answer:

170

Step-by-step explanation:

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You need 3 sticks of butter for every 24 cookies you bake. How many sticks of butter for 16 cookies
Kay [80]

Answer: 2 sticks.

Step-by-step explanation:

Given statement: You need 3 sticks of butter for every 24 cookies you bake.

Using unitary method , the number of sticks of butter used to bake 1 cookie=\dfrac{3}{24}=\dfrac{1}{8}

Then the number of sticks of butter used to bake 1 cookie=\dfrac{1}{8}\times16=2

Hence, the number of sticks of butter used to bake 16 cookies= 2

3 0
4 years ago
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The battery standby duration (in hours) of a new model of cell phone is known to be normally distributed. Ten pieces of such new
Stells [14]

x = number of hours

want to find probability (P) x >= 13

x is N(14,1) transform to N(0,1) using z = (x - mean) / standard deviation so can look up probability using standard normal probability table.

P(x >= 13) = P( z > (13 - 14)/1) = P(z > -1) = 1 - P(z < -1) = 1 - 0.1587 = 0.8413

To convert that to percentage, multiply 100, to get 84.13%

3 0
3 years ago
Write another expression equivalent to 2(x + 3) please answer i will make you brainliest
inna [77]

Answer:

2x + 6

Step-by-step explanation:

distribution

plz mark branliest

6 0
3 years ago
The equations of four lines are given. Identify which lines are perpendicular.
erma4kov [3.2K]

Answer:

Line 2 and Line 4 are perpendicular

Step-by-step explanation:

Line 2: y=1/5x−3

Line 4: y+1=−5(x+2)

3 0
3 years ago
Need help if anybody can help.​
Darina [25.2K]

Answer:

46.5

Step-by-step explanation:

Of all straight angles have 180 degrees in them.

So, to find x we need to form this equation:

x + 65 + x - 22 = 180

2x + 43 = 180

2x = 180-43

2x = 137

68.5 degrees = x

68.5-22 = 46.5 degrees.

m<CBD = 46.5 degrees.

m<GBF = also 46.5 degrees because it is a vertical angle to <46.5 degrees.

8 0
2 years ago
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