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Luden [163]
3 years ago
5

Kaio bought a meal in a town for $20. Sales tax was 6.5% and he left a 15% tip. What was the amount Kaio paid in sales tax?What

was the amount Kaio left as a tip?
What was the total cost of the meal?

A.$4.30

B.$21.30

C.$23.00

D.$24.30
Mathematics
1 answer:
Inessa [10]3 years ago
8 0
Answer: D. $24.30

Explanation:

$20 • 6.5% = $1.30

$20 • 15% = $3.00

$20 + $3 + $1.30 = $24.30
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Your bike was originally purchased for $1,200. It loses about 8% of its original value each year. Write an equation to represent
Arlecino [84]

Answer:

y= 1200(0.92)^x

Step-by-step explanation:

Given data

Cost price= $1200

Rate of decrease= 8%

Let the time be x

The expression that describes an exponential function is

y= ab^x

for decrease b= 1-r

y= 1200(1-0.08)^x

y= 1200(0.92)^x

Hence the expression is

y= 1200(0.92)^x

7 0
3 years ago
−4 + 9 − r − 5 in an equation
SVETLANKA909090 [29]

Answer:

Deez N--utz

Step-by-step explanation:

5 0
3 years ago
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18. A set of data has a sample mean of 65.4 and a standard deviation of 1.2. If the sample size is 45, what is the 99% confidenc
Agata [3.3K]

Given:

Sample mean = 65.4

Standard deviation = 1.2

Sample size = 45

Confidence level = 99%

To find:

The confidence interval.

Solution:

The formula for confidence interval is

CI=\overline{x}\pm z^*\dfrac{s}{\sqrt{n}}

where, \overline{x} is sample mean, z* is confidence value, s is standard deviation and n is sample size.

Confidence value or z-value at 99% = 2.58

Putting the given in the above formula, we get

CI=65.4\pm 2.58\times \dfrac{1.2}{\sqrt{45}}

CI=65.4\pm 0.46

CI=65.4-0.46\text{ and }CI=65.4+0.46

CI=64.94\text{ and }65.86

Therefore, the correct option is D.

5 0
2 years ago
Guyssssssss help me 10 points!!
zlopas [31]

Answer:

19

Step-by-step explanation:

the side is same as 57

what times 3 is 57?

57/3 is 19

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8 0
3 years ago
How do you solve this in standard form. y=7x-4
attashe74 [19]
Y = 2/7x - 4
y + 4 = 2/7x
4 = 2/7x - y (multiply everything by seven to get rid of the fraction)
28 = 2x - 7y
2x - 7y = 28
8 0
3 years ago
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