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4 years ago

What's the anwser to all of these

Mathematics

2 answers:

zavuch27 [327]4 years ago

6 0

9) 0.3
10) 4.1
11) 0.5
12) 4.8
13) 3.2
14) 1.6
15) 3.9
16) 1.5

Hope this helped, please mark brainliest

Ratling [72]4 years ago

5 0

9).9/3= .3

10). 8.2/2= 4.1

11). 3.5/7= .5

12.)9.6/2=4.8

13.) 6.4/2= 3.2

14.) 4.8/3=1.6

15.) 7.8/2= 3.9

16.) 7.5/5=1.5

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What two times could this be on the 24-hour clock?

Andrej [43]

I think it’s 1:40 am or 1:40 pm

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3 years ago

Linda West, a dental lab technician, pays three times as much

Natalka [10]

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Answer:

vision: $13.50
dental: $40.50
health: $162.00

Step-by-step explanation:

Let d, v, h represent the costs of dental, vision, and health insurance, respectively. The cost relations are ...

d = 3v . . . . . . . . . . . . . . . dental is 3 times vision

h = 3(v +d) . . . . . . . . . . . health is 3 times vision and dental combined

d + v + h = 9360 . . . . . annual premium

Substituting for h, we have ...

d + v + (3(d +v)) = 9360

Substituting for d, we have ...

3v +v +3(3v +v) = 9360

16v = 9360

v = 585

d = 3v = 1755

h = 3(d+v) = 7020

These are the total annual premiums. Linda pays 1/26 of 60% of this every two weeks. That fraction is 0.60/26 = 3/130.

a) Linda's biweekly vision insurance deduction is (585)(3/130) = $13.50

b) Linda's biweekly dental insurance deduction is (1755)(3/130) = $40.50

c) Linda's biweekly health insurance deduction is (7020)(3/130) = $162.00

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<em>Additional comment</em>

We know dental is 3v and health is 3(3v+v) = 12v = 4d. That is, once we find Linda's share of the biweekly vision premium, we can find the others by multiplying it by a suitable factor.

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3 years ago

Write an equation for the parabola whose vertex is at (4, 12) and which passes through (5, 21)

laiz [17]

Answer:

y - 12 = 9(x - 4)

Step-by-step explanation:

The vertex (h, k) is (4, 12) and the point (5, 21) is on the graph. Assuming that this is a vertical parabola, opening up (because the coordinate 21 is greater than the coordinate 12), we insert the knowns into y - k = a(x - h)^2, obtaining

21 - 12 = a(5 - 4), or 9 = a. With a known, we can write the desired equation:

y - 12 = 9(x - 4)

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3 years ago

in her kayak bunny can travel 70 miles downstream with the current in 5 hours. the return trip against the current takes 7 hours

Alinara [238K]

9514 1404 393

Answer:

kayak: 12 mph
current: 2 mph

Step-by-step explanation:

Bunny's rate downstream is ...

(70 mi)/(5 h) = 14 mi/h = k + c

Bunny's rate upstream is ...

(70 mi)/(7 h) = 10 mi/h = k -c

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(14 mi/h +10 mi/h)/2 = ((k +c) +(k -c))/2

(24 mi/h)/2 = 2k/2

12 mi/h = k

Then the current speed is ...

c = k -10 = 12 -10 = 2 . . . . mi/h

The still-water speed of the kayak is 12 mi/h; the speed of the current is 2 mi/h.

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<em>Additional comment</em>

World-class kayak paddlers will not maintain a speed more than 8 mi/h for that distance and/or time (140 miles in 12 hours). Bunny is exceptional.

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3 years ago

Simplify the equation given in the image

IRINA_888 [86]

Answer:

b^20/a^12

Step-by-step explanation:

b to the power of 20 over a to the power of 12

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3 years ago