Answer:
A. 42.5.
Step-by-step explanation:
This is a cyclic quadrilateral so opposite angles are supplementary.
Therefore, 2x + 95 = 180
2x = 180 - 95
2x = 85
x = 42.5.
Answer:
To decide whether to add or subtract, determine if the values of the coefficients are the same or opposites:
. If the values are the same, subtract the equations.
• If the values are opposites or additive inverses, add the equations.
Step-by-step explanation:
Given


Required
How to solve
Options (1) and (2) are incorrect because none of the options eliminate x or y.
For option (3),
- Check for the coefficients of x and y
- If they are the same (sign and value), then subtract; otherwise add
For instance:


Rewrite the second equation


The coefficient of y are the same, so we subtract;




<em>See that y has been eliminated</em>
Answer:
So sorry! Wish I could help : /
Step-by-step explanation:
The scale best estimates to 184, b. Mark me brainliest !!
Answer:
13.57 < µ < 15.43
Step-by-step explanation:
Assume: We have to assume the sample comes from a normally distributed population because we do not know the population standard deviation.
We assume that it was a random sample.
Do not assume: The sample size is at least 30 because we are that it's 10. Don't assume the variance is less than the mean because we can calculate it and will know for sure.
To find a 90% confidence interval we need to find the sample mean and sample standard deviation. See attached photo 1 for the calculations
See attached photo 2 for the construction of the confidence interval