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3 years ago

At the corner market, you can buy rice by

Mathematics

1 answer:

Gala2k [10]3 years ago

6 0

Answer:

Step-by-step explanation:

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PLEASE HELP AHHH I don't understandddd

lesya692 [45]

Answer:

je ne comprends pas non plus

Step-by-step explanation:

Je suis toujours en 6e hihihi désolé mon ami

4 0

3 years ago

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 $26cm^2$

4 0

4 years ago

Which statements are true about the ordered pair (-1,-4) and the system of equations? x-y=3 and 7x-y=-3

alexandr402 [8]

Answer:

when (-1, -4) is substituted into the first equation it's true

when (-1, -4) is substituted into the second equation it's true

the ordered pair (-1, -4) is a solution to the systems of equation

Step-by-step explanation:

original equation

x-y=3

multiply both sides by 7

7x-7y = 21

add 7y to both sides

7x=7y + 21

substitute into second equation

(7y+21)-y=-3

simplify

6y+21=-3

subtract 21 from both sides

6y=-24

y=-4

substitute y into original equation

x-(-4) = 3

cancel out negative signs

x+4=3

subtract -4 from both sides

x=-1

8 0

2 years ago

Name 2 strategies that you can use to find the area of a shape

Evgen [1.6K]

1. Multiply the dimensions

2. Make two smaller shapes and multiply each dimensions then add the answers together to get the final answer

6 0

3 years ago

Read 2 more answers

2.(03.07)<br> Solve 2x^2 - 8x = -7. (2 points)

madam [21]

Answer:

Step-by-step explanation:

Make a quadratic:

2 $x^{2}$ -8x+7=0

Then use quadratic formula to solve.

It would be x= 2 ± $\frac{2}{\sqrt{2} }$

6 0

3 years ago