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Pachacha [2.7K]
3 years ago
15

An eighth grade class rolls a number cube 50 times. The number cube has sides

Mathematics
1 answer:
marshall27 [118]3 years ago
3 0

Answer:

9/25

Step-by-step explanation:

Number of Trials =50

<u>Outcomes Less than 4</u>

Frequency of 1=6

Frequency of 2=4

Frequency of 3=8

Total =6+4+8=18

Relative frequency for "roll a number less than 4" =18/50=9/25

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Use the quadratic formula to solve. Round to the nearest tenth if necessary.<br> 2x^2 -3x -7 = 0
abruzzese [7]

The quadratic formula is:

\frac{-b + \sqrt{b^2 - 4ac} }{2a} and  \frac{-b - \sqrt{b^2 - 4ac} }{2a}

In this case, a = 2, b = -3, and c = -7

So, we can plug in the numbers to get:

  \frac{-(-3) + \sqrt{(-3)^2 - 4(2)(-7)} }{2(2)} and    \frac{-(-3) - \sqrt{(-3)^2 - 4(2)(-7)} }{2(2)}

Simplifying, we get:

    \frac{3 + \sqrt{65} }{4} and   \frac{3 - \sqrt{65} }{4}

You need to use a calculator to find what these would be in decimal form. The answer, rounded to the nearest tenth, is: x = 2.8, x = -1.3

8 0
2 years ago
Solve: |4x + 5| + 8 &gt;(or equal to)45
KatRina [158]
This is pretty simple once you get used to this


First set it equal to the original and the negative one
(>_) is the bigger and equal to part

4x+5>_45 or 4x+5>_-45

Then solve for x for both


4x>_40. 4x>_-50
X>_10 X>_-25/2
8 0
3 years ago
The sum of three consecutive numbers is 72 what are the smallest of these numbers
Airida [17]
A + b + c = 72

a = b - 1

c = b + 1

 

(b - 1) + b + (b + 1) = 72

Simplify

3b = 72

b = 24

 

a = 24 - 1

a = 23


8 0
3 years ago
Who needs pts.<br> Look for my next question... ill be giving a free 100pts
IRISSAK [1]

Answer:

ok

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
What is the first step in solving ln(x − 1) = ln6 − lnx for x?
Stels [109]

Answer:

Option C - Simplify the right side using the "difference of two logs is the log of the quotient" property.

Step-by-step explanation:

Given : Expression \ln (x-1)=\ln 6-\ln x

To find : What is the first step in solving  the expression ?

Solution :

Expression \ln (x-1)=\ln 6-\ln x

Step 1 - Simplify the right side using the "difference of two logs is the log of the quotient" property.

i.e. \ln a-\ln b=\ln(\frac{a}{b})

Apply the first step we get,

\ln (x-1)=\ln(\frac{6}{x})

Therefore, Option C is correct.

6 0
3 years ago
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