Answer:
3x + 20 = 80
Step-by-step explanation:
If Sam gets paid $20 a week whether she makes any cakes or not, that is a fixed amount. The amount that she makes will only go up IF she makes cakes. She makes $3 per cake she bakes, and if the number of cakes is our unknown, the expression for that is 3x. Adding that to the fixed amount she makes is 3x + 20. Now we set that equal to 80, which is what she made in a week and solve it for x, which gives us the number of cakes she had to bake to make that $80.
3x + 20 = 80
Answer: The sample mean
Step-by-step explanation:
The confidence interval is given by :-
Sample mean ± Margin of error
Given : The scores on a standardized test are normally distributed. If a random sample of standardized test scores is taken and the confidence interval is (497,537).
i.e. Sample mean - Margin of error = 497 ..(i)
Sample mean + Margin of error=537 ..(ii)
Adding (1) and (2), we get
2 (Sample mean) = 1034
⇒Sample mean = 517
Hence, the sample mean
Answer:
35°
Step-by-step explanation:
Same-Side interior angles (consecutive angles) are supplementary.
Supplementary meaning that those two angles add up to make 180°.
So Angles C is 35°
Step-by-step explanation:
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