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3 years ago

If a=8, b=6 and c=2 what is the value of: 2ac/b

Mathematics

1 answer:

gayaneshka [121]3 years ago

8 0

We need to substituter the values for the variables. 2(8)(2)/(6), or 32/6, or 5.3333

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Drag each equation to show if it could be a correct first step to solving the equation 3(6+x)=24

kakasveta [241]

Use the distributive property.

3(6 + x) = 24

18 + 3x = 24

3x = 6

x = 2

5 0

3 years ago

Read 2 more answers

How to put 33 into 4:7

Tema [17]

4+7 = 11
so
33 / 11 = 3

4 x 3 = 12
7 x 3 = 21

so answer
4:7 = 12:21

4 0

3 years ago

What is the answer?<br>4+7+10+...+151=?

Mrac [35]

Answer:

151-4=147÷3=49+1=50

151+4=155÷2=77.5×50=3875

3875 is the answer

Step-by-step explanation:

numbers=(last number-first number)÷proximate+1

total=((last number+first number)÷2)×numbers

3 0

4 years ago

Solve for x: 20x2 - 7x = 6

azamat

Answer:

if the x after the 20 means multiply then the answer is -34/7 or -4 6/7 if the x is a letter then it's 2/11

Step-by-step explanation:

20x2-7x=6

20x2=40

40-7x=6

subtract 40 from 6= 34

-7x=34

34÷-7= -34/7 if needed in a mixed fraction -4 6/7

4 0

3 years ago

An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an est

Nookie1986 [14]

Answer:

confidence interval = (27.9, 28.3)

Step-by-step explanation:

Here we are given the population std deviation value as 5.7. So we can use Z critical value for finding out confidence interval.

Sample size n = 4386

Std error of sample mean = $\frac{5.7}{\sqrt{4386} } \\=0.0861$

Sample mean = 28.1

Z critical value two tailed for 98% = 2.326

margin of error = ±2.326*0.0861 =0.2003

confidence interval lower bound

= $28.1-0.2003=27.8997$

Upper bound

= $28.1+0.2003\\=28.3003$

After rounding off we get

confidence interval = (27.9, 28.3)

7 0

3 years ago