How do I do this??? It's for my algebra test on Wednesday.
Answers
Your first instinct was to multiply it out and get rid of the parentheses.
That's often a good instinct, but this time, it made things harder for you.
This is a good example of a rule you should consider:
Before you do anything to anything, sit back, relax,
LOOK at the problem, THINK about it, and plan your
strategy. Decide what the solution might look like,
and what you're going to do to the given information
in order to move towards the solution.
You might look at this particular equation and ponder:
-- If I multiplied this thing out and got rid of the parentheses, it would
have x³ in it. So there are going to be 3 solutions.
-- If either factor is zero, then the equation is true.
-- One of the factors is 6x. Setting that to zero gives one solution: x=0.
-- The other two solutions come from setting (4x² - 4) = 0 .
-- That's the difference of 2 squares, so it's (2x + 2) (2x - 2) = 0
-- The other 2 solutions come from setting each of those factors to zero.
There you are. You got this far just by thinking, without even picking up
your pencil yet.
then 6x = 0 --- eqn.1
or (4x^2-4) = 0 --- eqn.2
from eqn.1 we get that x=0
from eqn.2 we get:
4x^2=4
x^2=1
x^2 - 1 =0
(x-1) * (x+1) = 0
so x = +1 and -1
the final answer is x= 0, -1 , 1
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10 x 10 x 10 [inch OR unit cubes - it's the same since cubes' dimensions are 1 x 1 x 1 inch)
I attach the explanation below.
Answers
8/2(5)
4/5
.8
10) 8(4-1) x 4
8(3) x 4
24x4
96
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81 (2) + 7
162+7
169
14) 8^2 -1 +4 /2
64-1+4/2
67/2
33.5
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121 + 8 - 3 x 4
129 -12
117
#72^3÷2(3+2)2^2×(3+2)4×520
Answers
52 weeks in 1 year.
f(n) = 52n
Hanna's age in year: Hanna's age in weeks
1 f(1) = 52(1) 52
2 f(2) = 52(2) 104
3 f(3) = 52(3) 156
4 f(4) = 52(4) 208
5 f(5) = 52(5) 260
11 f(11) = 52(11) 572
24.8 < μ < 27.0
24.2 < μ < 27.6
24.4 < μ < 27.4
Answers
The 95% confidence interval for the true mean weight, μ, of all packages received by the parcel service is;
Option A; 24.6 < μ < 27.2
We are given;
Sample mean; x' = 25.9 pounds
Standard deviation; σ = 3.8 pounds
Confidence level; CL = 95%
Sample size; n = 34
Now formula for confidence interval is;
CI = x' ± z( σ/√n)
Where z is critical value at given confidence level.
z at CL of 95% is; z = 1.96
Thus;
CI = 25.9 ± 1.96(3.8/√34)
CI = 25.9 ± 1.3
CI = (25.9 - 1.3), (25.9 + 1.3)
CI = (24.6, 27.2)
Read more at; brainly.com/question/12970960
Answer:
24.6 < μ < 27.2
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 25.9 - 1.3 = 24.6 pounds.
The upper end of the interval is the sample mean added to M. So it is 25.9 + 1.3 = 27.2 pounds.
So the correct answer is:
24.6 < μ < 27.2
Answers
Answers
1. 6x=4y + 7
2. You have to write it in slope intercept to get the slope and y-intercept.
3. Subtract 7 on both sides
4y= 6x-7
4. Divide everything by 4
5. Y= 3/2x + -7/4
6. Slope= 3/2 y-intercept= -7/4