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3 years ago

7th grade math help me please :))

Mathematics

1 answer:

mash [69]3 years ago

7 0

Answer:

8/15 = 16/30 = 24/45 = 32/60

= 40/75 = 48/90 = 56/105 = 64/120

= 72/135 = 80/150 = 88/165 = 96/180

= 104/195 = 112/210 = 120/225 = 128/240

= 136/255 = 144/270 = 152/285 = 160/300

= 168/315 = 176/330 = 184/345 = 192/360

= 200/375 = 208/390 = 216/405 = 224/420

= 232/435 = 240/450 = 248/465 = 256/480

= 264/495 = 272/510 = 280/525 = 288/540

= 296/555 = 304/570 = 312/585 = 320/600

= 328/615 = 336/630 = 344/645 = 352/660

= 360/675 = 368/690 = 376/705 = 384/720

= 392/735 = 400/750 = 408/765 = 416/780

= 424/795 = 432/810 = 440/825 = 448/840

= 456/855 = 464/870 = 472/885 = 480/900

= 488/915 = 496/930 = 504/945 = 512/960

= 520/975 = 528/990 = 536/1005 = 544/1020

= 552/1035 = 560/1050 = 568/1065 = 576/1080

= 584/1095 = 592/1110 = 600/1125 = 608/1140

= 616/1155 = 624/1170 = 632/1185 = 640/1200

= 648/1215 = 656/1230 = 664/1245 = 672/1260

= 680/1275 = 688/1290 = 696/1305 = 704/1320

= 712/1335 = 720/1350 = 728/1365 = 736/1380

= 744/1395 = 752/1410 = 760/1425 = 768/1440

= 776/1455 = 784/1470 = 792/1485 = 800/1500

Step-by-step explanation:

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2 years ago

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aev [14]

Answer:

Step-by-step explanation:

10 times 1/10 equals 1, so you don't need that since you are multiplying, but if you do, you end up with 35 x 1, which is still 35

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2 years ago

Read 2 more answers

What expressions are equivalent to -56z + 28

makvit [3.9K]

Answer:

3b+b and 2(2b)

Step-by-step explanation:

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3 years ago

I confused on this question

Fynjy0 [20]

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3 years ago

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Suppose the waiting times in an emergency room are normally distributed with a mean (mean) of 40 and a standard deviation (sigma

kipiarov [429]

Answer:

0.68269

Step-by-step explanation:

When we are to find the z score for population where a random sample is picked, the z.score formula we use is

z = (x-μ)/Standard error, where

x is the raw score,

μ is the population mean

Standard error = σ/√n

σ is the population standard deviation

n = random number of samples

For : x = 38 minutes, μ = 40, σ = 10, n = 5

z = 38 - 40/10 /√25

= -2/10/5

= -2/2

= -1

Determining the probability value using z table

P(x = 38) = P(z = -1)

= 0.15866

For : x = 42 minutes, μ = 40, σ = 10, n = 25

z = 42 - 40/10 /√25

= 2/10/5

= 2/2

= 1

Determining the probability value using z table

P(x = 42) = P(z = 1)

= 0.84134

The probability that their average waiting time will be between 38 and 42 minutes is calculated as

P(-Z<x<Z)

= P(-1 < x < 1)

= P(z = 1) - P(z = -1)

= 0.84134 - 0.15866

= 0.68269

Therefore, the probability that their average waiting time will be between 38 and 42 minutes is 0.68269

3 0

3 years ago