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Effectus [21]
3 years ago
9

Melissa and Thomas both solved the same problem using different methods. Their work is shown below. Who solved the problem incor

recly? Explain.
Mathematics
1 answer:
MaRussiya [10]3 years ago
5 0
Pls show the problem so I can solve
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A racecar driver completes a race 30 laps in 15 minutes at a constant speed. what is the driver's speed?
Nataly [62]

Answer:

200 mph/321 km/h if the track is 1 mile long and 100 mph/160 km/h if the track is 2 miles long

Step-by-step explanation:

8 0
3 years ago
How do you find the definition of rhombus
KatRina [158]

Answer:

by using goog_le, or by asking a teacher

5 0
3 years ago
PLEASE HELP!!! I WILL MARK BRAINLEST!!!
storchak [24]

Answer:

Each hat is $5

Each mask is $3

Step-by-step explanation:

Hat= x dollars

Mask= y dollars

Now,

3 hats and 4 mask sold = $27

We can write

3x + 4y = 27

Adding the second equation (-1 times 1st equation) gives us;

3x + 6y = 33

-1* (3x + 4y = 27)

3x + 6y = 33

-3x -4y = 27

2y = 6

y = 6/2

***y = 3***

Now we replace y= 3 into 1st equation and solve for x:

3x + 4y = 27

3x + 4(3) = 27

3x + 12 = 27

3x + 15

x = 15/3

***x= 5***

Each hat costs $5

Each mask costs $3

6 0
3 years ago
Circle A has a diameter of 9 inches, a circumference of 28.26 inches, and an area of 63.585 square inches. The diameter of circl
torisob [31]
Please note that pi has just one value.  The only difference stems from round-off error when you don't use all of the digits following "3.14159 ... " to represent the value of pi.  The formula for circumference is C = 2 pi r, or C = pi d, 
where r=radius and d=diameter.

Circle A:  Diameter 9 inches and Circumference of 28.26 inches

If the diameter is 9 inches, then C = 28.26 inches = pi (9 inches).  Divide 28.26 inches by 9 inches.  Note that you MUST round off the ratio (pi) that you obtain, since 28.26 has 4 significant figures and 9 has just one.

28.26
------- = 3.14, but because 9 has just one significant figure, you must round 
    9           this 3.14 to just 3.


6 0
3 years ago
Find the area and circumference of the circle below:<br> Diameter - 14 cm
MAVERICK [17]

Answer:

<em>Area : 153.86cm</em>

<em>Circumference:  43.96cm</em>

Step-by-step explanation:

<u><em>To Find:</em></u>

<em>Area __ cm</em>

<em>Circumference__ cm</em>

<u><em>Given:</em></u>

<em>Since, it given that the Diameter is 14 cm</em>

<em>Diameter which is any straight line segment that passes through the center of the circle.</em>

<em>Radius which is half of diameter</em>

<u><em>Note: </em></u>

<em>A = πr  ²                                                          {Area Formula}</em>

<em>C = rd                                                           {Circumference Formula}</em>

<em>pi also known as π = 3.14                            {approximately }</em>

<em>"r " means Radius</em>

<em>"d " means diameter</em>

<em>c = circumference</em>

<em>a = area</em>

<u><em>Solve:</em></u>

<em>A = πr  ²</em>

<em>Since radius is half of the diameter then...</em>

<em>14/2 = 7</em>

<em>Radius = 7</em>

<em>A = 3.14(7)²                                   { (7)² means 7 × 7 </em><u><em>Not </em></u><em>7 × 2 }</em>

<em>A = 3.14(49)                                  { 7 × 7 = 49}</em>

<em>A = 153.86</em>

<em>C = rd       </em>

<em>C = 3.14(14)</em>

<em>C = 43.96</em>

<em>Area : 153.86cm</em>

<em>Circumference:  43.96cm</em>

<u>For More information:</u>

brainly.com/question/14068861

brainly.com/question/2407529

<u><em>~Kavinsky</em></u>

<em>    </em>

4 0
2 years ago
Read 2 more answers
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