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2 years ago

14

How is it helpful to write numbers in different ways?

1 answer:

e-lub [12.9K]2 years ago

8 0

You should write numbers in as many ways as you possibly can to make new connections in your brain. Knowing how to write numbers in many different ways can help you solve difficult problems more easily. Doing this can also reinforce the mathematical principles and logic you have memorized. Hope this helped

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51 is 17% of which number?

jeyben [28]

Answer:

300

Step-by-step explanation:

17/100x=51

x=300

17/100(300)=51

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3 years ago

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Paladinen [302]

Answer:

40 sq. units

Step-by-step explanation:

<h3>Solution 1</h3>

The figure (kite) is symmetric and covers half of the area of rectangle with sides 8 units aby 10 units

<u>The area of the rectangle:</u>

A = 8*10 = 80 sq. units

<u>The area of the kite:</u>

A = 1/2*80 = 40 sq. units

<h3>Solution 2</h3>

Split the kite into two triangles and calculate their area and add up

<u>Triangle DCB has b = 8, h = 2 and has area:</u>

A = 1/2*8*2 = 8 sq. units

<u>Triangle DAB has b = 8, h = 8 and has area:</u>

A = 1/2*8*8 = 32 sq. units

<u>Total area:</u>

8 + 32 = 40 sq. units

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2 years ago

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Two cars leave town at the same time and travel in opposite directions. Speed of car A is 12 km/h more than car B. They are 312k

Zina [86]

Answer:

Speed of car B is 33 km/h and speed of car A is $45\,\,km/h$

Step-by-step explanation:

Let speed of car B be $x$ km/h

Speed of car A is 12 km/h more than car B.

Therefore,

Speed of car A = $(12+x)$ km/h

Distance = Speed × Time

Distance travelled by car A in 4 hours = $4(12+x)$ km = $(48+4x)$ km

Distance travelled by car B in 4 hours = $4x$ km

Also, cars A and B are 312km apart after 4 hours.

$48+4x+4x=312\\48+8x=312\\8x=264\\\\x=\frac{264}{8}\\\\x=33\,\,km/h$

Speed of car B is 33 km/h and speed of car A is $12+x=12+33=45\,\,km/h$

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2 years ago

Classify the triangle by its angles.

dedylja [7]

Answer:

29°: Acute 90°: Right 61°: Acute

Step-by-step explanation:

If an angle is less than 90 degrees, it is acute. If it is greater than 90 degrees, it is obtuse. If it is exactly 90 degrees, it is right.

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2 years ago

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- |2| what does this mean?

Helga [31]

-2 is the answer

Step-by-step explanation:

-2 is the answer because any thing with | | around it means it's a positive number. but the negative sign makes it negative.

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2 years ago

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