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klasskru [66]
3 years ago
6

The bill for dinner is $31.85. There is 8% sales tax and you leave a 15% tip. What is the total cost of your dinner?

Mathematics
1 answer:
zmey [24]3 years ago
7 0

Answer:

39.18$

Step-by-step explanation: 8 percent of 31.85 is 2.548 and 15 percent of 31.85 is 4.775. 4.775 + 2.548 + 31.85 is equal to 39.1755. you can only have 2 number after the decimal point because youre using money so you would round from the 100ths which would equal a total of 39.18! BOOM!

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3 over 3 - square root 5
DIA [1.3K]

Answer:

-1.236.

Step-by-step explanation:

3/3 = 1.

√5 = 2.236.

1.000 - 2.236 = -1.236.

the answer is negative because the smaller number is subtracting the larger number..........u just subtract the normal way,( the larger number take away the smaller number), but u should insert a negative sign to the answer.

5 0
3 years ago
Determine the sample size needed to construct a 99​% confidence interval to estimate the average GPA for the student population
Volgvan

Answer: n = 14

Step-by-step explanation: margin of error = critical value × σ/√n

Where σ = population standard deviation = 1

n = sample size = ?

We are to construct a 99% confidence interval, hence the level of significance is 1%.

The critical value for 2 tailed test at 1% level of significance is gotten from a standard normal distribution table which is 2.58

Margin of error = 0.7

0.7 = 2.58×1/√n

0.7 = 2.58/√n

By cross multipying

0.7×√n = 2.58

By squaring both sides

0.7^2 × n = 2.58^2

0.49 × n = 6.6564

n = 6.6564/0.49

n = 14

3 0
3 years ago
Find the axis of summetry and the Vertex of its graph. Y=x2/squared-8x
Vilka [71]

Answer:

Direction: Opens Up

Vertex:

(

4

,

−

18

)

(4,-18)

Focus:

(

4

,

−

71

4

)

(4,-714)

Axis of Symmetry:

x

=

4

x=4

Directrix:

y

=

−

73

4

y=-734

Select a few

x

x values, and plug them into the equation to find the corresponding

y

y values. The

x

x values should be selected around the vertex.x

y

2

−

14

3

−

17

4

−

18

5

−

17

6

−

14

xy2-143-174-185-176-14

Graph the parabola using its properties and the selected points.

Direction: Opens Up

Vertex:

(

4

,

−

18

)

(4,-18)

Focus:

(

4

,

−

71

4

)

(4,-714)

Axis of Symmetry:

x

=

4

x=4

Directrix:

y

=

−

73

4

y=-734

x

y

2

−

14

3

−

17

4

−

18

5

−

17

6

−

14

xy2-143-174-185-176-14

image of graph

3 0
3 years ago
PLEASE HELP HELP PLEASE <br> Photos attached hon -
xenn [34]

Answer:

Picture #1: True

Picture #2:

12y - 6 - 4y = 14

8y - 6 = 14

8y = 20

y = 20/8= 5/2

Picture #3

-3y-10=5y+14

-8y - 10 = 14

-8y = 24

y = -3

Picture #4

.50x. + 4.50 = 31.50

.50x = 27.00

x = 54

Picture #5

15x - 24 = 15x - 24

answer is b

3 0
3 years ago
What 8 divided by 1 4/5
AnnZ [28]

Answer:

8 divided by 1 4/5 equals 4 4/9

5 0
2 years ago
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