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2 years ago

I need correct answer plzz

Mathematics

1 answer:

julsineya [31]2 years ago

7 0

Answer:

Each section below

Step-by-step explanation:

(a) Add all frequencies together = 200, then add 1 and divide by 2 = 100.5, lastly you need to add each frequency until you find the interval that contains the 100th and 101st height.

23+47 = 70

70+45 = 115 -> so the answer is 10<h<13

(b) Step 1: find the midpoint of each interval (upper limit+lower limit then divide by 2)

(2+6)/2 = 4

(6+10)/2 = 8

(10+13)/2 = 11.5

(13+17)/2 = 15

(17+19)/2 = 18

(19+20)/2 = 19.5

Step 2: multiply the midpoint of each interval with it's frequency

4*23 = 92

8*47 = 376

11.5*45 = 517.5

15*38 = 570

18*32 = 576

19.5*15 = 292.5

Step 3: add all of the above and divide it by the total frequency

92+376+517.5+570+576+292.5 = 2424

2424/200 = 12.12 (this is your answer to part b)

Hope this helped :)

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Solve the equation 15x+2=45x+4

BaLLatris [955]

15x + 2 = 45x + 4

Subtract 2 from both sides, as well as subtracting 45x from both sides.

15x - 45x = 4 - 2

-30x = 2

Divide both sides by -30.

x = 2/-30

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~Hope I helped!~

5 0

2 years ago

Molly tried to evaluate 93\times5193×5193, times, 51 using partial products. Her work is shown below.

Mrac [35]

Since molly's solution tally's with the given solution, hence Molly's solution is correct.

Given the working on a partial product of 93 and 51 carried out by Molly as shown:

$\begin{array}{llrr} &&93 \\ &&\underline{{}\times51} \\ &\blueD{\text{Step 1}}&\blueD{3}& \blueD{1\times3\text{ ones}}\\ &\greenD{\text{Step 2}}&\greenD{90}& \greenD{1\times 9\text{ tens}}\\ &\maroonD{\text{Step 3}}&\maroonD{150}& \maroonD{50\times 3\text{ ones}}\\ &\goldE{\text{Step 4}}&\underline{{}+\goldE{ 4{,}500}}& \goldE{50\times 9\text{ tens}}\\ &\purpleD{\text{Step 5}}&\purpleD{4{,}743}& \end{array}$

This partial product can also be solved as shown below:

$93 \times 51 = (90+3)\times (50+1)$

Applying the distributive law:

$93 \times 51 = 90(50) + 90(1) + 3(50) + 3(1)\\93 \times 51 =4500 + 90 + 150 + 3\\93 \times 51 =4500+240+3\\93 \times 51 =4740+3\\93 \times 51 =4743$

Since molly's solution tally's with the given solution, hence Molly solution is correct.

Learn more about partial product at: brainly.com/question/24716925

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2 years ago

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2 years ago

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Jlenok [28]

Answer:

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Step-by-step explanation:

8/a - 6/a + 7/a

Since the denominators are the same, we can add the numerators

8-6+7 =9

Then put it over the common denominator a

9/a

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2 years ago

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Lelu [443]

Answer:

Step-by-step explanation:

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5 x 12 = 60/2 = 30

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7 0

2 years ago

I need correct answer plzz​

I need correct answer plzz