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eimsori [14]
3 years ago
13

Nine subtracted from four times a number is -21 what is the number?

Mathematics
2 answers:
frozen [14]3 years ago
5 0
The answer should be -4.2
faust18 [17]3 years ago
3 0

Answer:

-3

Step-by-step explanation:

My knowledge ;D

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Find the probability of a least one birthday match among a group of 44 people.
Cerrena [4.2K]

Answer:

0.1137= 11.37%

Step-by-step explanation:

Assuming there are 365 days in one year and every people have 1 birthday, then the chance for two people to have the same birthday is 1/365 and the chance they are not is 364/365. We are asked the chance for at least one match among 44 people. The opposite of the condition is that we have 0 matches and easier to calculate. The calculation will be:

P(X>=1)= ~P(X=0) = 1

P(X>=1)=- P(X=0)

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3 0
3 years ago
What is the slope in an equation
iris [78.8K]

Answer:

M is the slope

Step-by-step explanation:

In the equation y=mx+b the slope is the number “m” that is multiplied by the x and “b” is the y intercept

6 0
3 years ago
What is the scale factor that takes the large triangle to the small triangle?
Lerok [7]

Step-by-step explanation:

such a scale factor applies to all sides and lines.

we see that DE is 12 units, and AB is 4 units.

so,

12×f = 4

f = 4/12 = 1/3 is the scale factor

control : check the other side

FE = 6 units

6 × 1/3 = 2

so, the corresponding side in the small triangle must be 2 units long.

and indeed, CB is 2 units long. all correct.

5 0
2 years ago
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