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Factor x²+x-42
First, think of two numbers such that
- If we multiply them we'll get -42
- If we add them we'll get 1
These numbers are:-
7 and -6
Write them here:-
(x+7)(x-6)
<em>Note:-</em>
We don't have to use the Big X method, since the coefficient of x² is 1.
If it's greater than 1, like 2, then the Big X method comes in handy.
<h3>Good luck.</h3>
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The formula of area is length x width
so if the area is already found , 54 divided by 9 is 6.
The other side of the rectangle is 6 units
for a picture you can just draw a rectangle and label the side 9 and 6 units lol
We can think of the number of Malik’s height as a variable. I’ll use h.
“16 less than Malik’s height”
Less than is a subtraction phrase. So you know that you will be using subtraction in this equation.
Malik’s hight is h. 16 - h.
And we know that it equals 43. Therefore, 16 - h = 43.
Hope this helps
Answer:
29.4≤μ≤32.6
Step-by-step explanation:
The datas given from the questions are as shown:
Number of people n = 24
Mean xbar= $31
Standard deviation σ = $6
Confidence Interval formula is expressed as:
CI = xbar ± Z(σ/√n)
Z value for 80% confidence interval is 1.282
Substituting the values into the Confidence Interval formula will give;
CI = 31 ± 1.282{6/√24}
CI = 31 ± 1.282(1.225)
CI = 31 ± 1.57045
CI = 31+1.57045 and 31-1.57045
CI = (29.42955, 32.57045)
CI = (29.4, 32.6) to 1dp
The confidence interval will be within the range 29.4≤μ≤32.6