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3 years ago

BRAINLIEST 7TH GRADE MATH

Mathematics

2 answers:

lozanna [386]3 years ago

8 0

Answer:

the answer is b=48

Step-by-step explanation:

52+y+59=180(angle on a straight line is 180)

collect like terms

y=180-59+52

y=180-111

y= 69

to look for x is equal to

69+x+63=180

collect like terms

x=180-69+63

x=180-132

x=48

so mark the briliest o

Rasek [7]3 years ago

3 0

Answer:

Step-by-step explanation:

180- 59- 52 = 69

Therefore,

69 + x + 63 = 180

x = 48

Thenks and mark me brainliest :)

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Jen is 7 cm shorter than twice Ann's height. together they are 146 cm. How tall is Jen?

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136 in cm I pretty sure i’m correct

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4 years ago

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The circumference of a sphere was measured to be 82 cm with a possible error of 0.5 cm. (a) Use differentials to estimate the ma

NeTakaya

Answer:

The Maximum error is $26cm^2$

Step-by-step explanation:

Given that the circumference of a sphere was measured to be 82 cm with a possible error of 0.5 cm

<h3>To find :</h3><h3>(a) Use differentials to estimate the maximum error in the calculated surface area. (Round your answer to the nearest integer.) $cm^2$ </h3>

Given circumference of a sphere=82 cm and possible error =0.5 cm

Error of the surface area is dA

Error of circumference is dC = 0.5 cm

We know that the formula for Circumference of a sphere is C=2πr units

Differentiating with respect to r

$dC = 2\pi dr$

$dr =\frac{dC}{2π}$

$=\frac{0.5}{2\pi}$ (∵ dC = 0.5 cm)

<h3>Since Area $A = 4\pi r^2$ square units</h3>

Differentiating with respect to r

$dA = 8\pi rdr$ square units

Since given C = 82 cm.and also C=2πr we have

$r=\frac{C}{2π}$

$=\frac{82}{2π}$

$r=\frac{41}{π}$

From that $dA = 8\pi rdr$

Substituting the values of r and dr in the above equation we get

$dA = 8\pi (\frac{41}{\pi}) (\frac{0.5}{2\pi})$

$=4(41)\times (\frac{0.5}{3.14})$

$=26.1146$

$dA=26cm^2$

∴ Maximum error is $26cm^2$

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4 years ago

Answer this question for me

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Answer:

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Step-by-step explanation:

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3 years ago

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Reina and Sam are multiplying (84)5 (73)9. Reina's Work Sam's Work (84)5 (73)9 = 84 + 573 + 9 = 89712 (84)5 (73)9 = 84⋅573⋅9 = 8

Romashka-Z-Leto [24]

This is a tricky question that Reina and Sam are multiplying (84)5 (73)9and their work are (84)5 (73)9 = 84 + 573 + 9 = 89712 Reina's(84)5 (73)9 = 84⋅573⋅9 = 820727 Sam'sActually they are doing or multiplying using exponents.
Reina’s work (8⁴)₅(7³)⁹=8⁴⁺⁵+ 7³⁺⁹= 8⁹ 7¹²This is incorrect because she added exponents instead of multiplying exponents
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4 years ago

The table shows the weights of giant pumpkins grown in two towns, Cedartown and Baytown. Match each phrase to its value. Weight

Alexxandr [17]

Average and mean absolute deviation of pumpkins grown in Cedartown: 668.5; 60.4

Average and mean absolute deviation of pumpkins grown in Baytown: 628.5; 40.2

<h3>What is the Mean Absolute Deviation?</h3>

The average distance of each point from the mean of a data is the absolute mean deviation.

Mean and mean absolute deviation of pumpkins grown in Cedartown:

611, 753, 575, 685.5, 718

Average/Mean = (611 + 753 + 575 + 685.5 + 718)0/5

Average/mean = 3342.5/5 = 668.5

Mean absolute deviation = [(611 - 668.5) + ( 753 - 668.5) + ( 575 - 668.5) + ( 685.5 - 668.5) + ( 718 - 668.5)] / 5

Mean absolute deviation = [(57.5) + (84.5) + (93.5) + (17) + (49.5)]/5 = 302/5

Mean Absolute Deviation = 60.4

Mean and mean absolute deviation of pumpkins grown in Baytown:

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Average/Mean = (584 + 622 + 713.5 + 579 + 644)/5

Average/mean = 3142.5/5 = 628.5

Mean absolute deviation = [(584 - 628.5) + ( 622 - 628.5) + ( 713.5 - 628.5) + ( 579 - 628.5) + ( 644 - 628.5)] / 5

Mean absolute deviation = [(44.5) + (6.5) + (85) + (49.5) + (15.5)]/5 = 201/5

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Learn more about mean absolute deviation on:

brainly.com/question/447169

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