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3 years ago

Can someone pls Help me??

Mathematics

2 answers:

lidiya [134]3 years ago

6 0

Answer:

Right triangle.

Step-by-step explanation:

Side lengths 9, 12, and 15 form a right triangle.

According to the Converse of the Pythagorean Theorem, If the square of the length of the longest side of a triangle is equal to the sum of the squares of the lengths of the other two sides, then the triangle is a right triangle.

Let a = 9

b = 12

c = 15

We'll plug in these values into the Pythagorean Theorem to determine whether the squared value of the longest side is equal to the sum of the squared value of the two other sides:

$c^{2} = a^{2} + b^{2}$

$15^{2} = 9^{2} + 12^{2}$

225 = 81 + 144

225 = 225

Since the sum of the squared lengths of the two other sides is equal to the squared value of the longest side, then it means that it is a right triangle.

Ronch [10]3 years ago

5 0

Answer:

right triangle

Step-by-step explanation:

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A scoop of ice cream has a 3-inch diameter. How tall should the ice cream cone of the same diameter be in order to contain all o

pishuonlain [190]

Answer:

12 inches

Step-by-step explanation:

Suppose the ice cream scoop has the shape of a sphere of a radius (r) inches.

Thus, the top of the cone will also have a radius (r) inches.

Let consider h to be the height of the cone in inches.

So, the objective is to make the volume of the scoop of the ice cream to be the same as the volume of the cone.

To do that; we need to equate both volumes together and make h the subject of the formula:

The volume of a sphere = 4/3 πr³ and the volume of a cone = 1/3πr²h

4/3 πr³ = 1/3πr²h

Multiply both sides by 3

4πr³ = πr²h

4r = h

h = 4(3)

h = 12 inches

To contain all the ice cream inside the cone, the height of the ice cream cone needs to be 12 inches tall

4 0

3 years ago

1 A rational number is an irrational number<br>3) A negative number is an integer.

andrezito [222]

Answer:yea I think

Step-by-step explanation:

5 0

3 years ago

Rashid [163]

Answer:

16.28%

Step-by-step explanation:

50 - 43

------------- x 100% = 16.2790697674%

Step 1.

You have to divide (50-43)/43

Step 2.

Multiply your answer to 'step 1' by 100%

Step 3.

Sometimes your teacher will tell you to round your answer, so that is your last step.

Percent increase formula:

$\frac{new value - original value}{original value} * 100percent$

6 0

3 years ago

A car is traveling at a steady speed. It travels 1 1/2 miles in 2 1/4 minutes. How far will it travel in 40 minutes? In 1 hour

Whitepunk [10]

Answer:

Answer: The car will travel 29 1/3 miles in 44 minutes, 40 miles in an hour

Step-by-step explanation:

1 1/2x2 1/4 = 2/3

Multiply that by your minutes (25) and you will get 16.6666

Convert to a fraction and u will get 16 2/3 miles in 25 minutes

40 miles in an hour

6 0

3 years ago

11. Write the balanced equation for the reaction of HC2H3O2, with Al(OH)3 to form H2O and Al(C2H302)3:

Kamila [148]

Answer:

74.36 g of aluminium acetate.

730.27g of aluminium acetate.

- to the nearest hundredth.

Step-by-step explanation:

Acetic acid is usually written as CH3COOH.

a. 6CH3COOH + Al(OH)3 ---> Al(CH3COO)3 + 9H2O

So 6 moles of acetic acid produce 1 mole of aluminium acetate.

Using the molecular masses

6*( 1.008*4 + 12.011*2 + 16 *2) g acetic acid gives (26.98+3(36.032+ 2*12.011)

348.228 g acetic acid gives 207.142 g Al acetate.

So 125 g gives (207.142 / 348.228) * 125

= 74.36 g of aluminium acetate.

(26.98 + 3*16 + 3 * 1.008) g of Al(OH)3 gives 207.142 g Al acetate

78.004 g gives 207.142 g Al acetate

275 g gives (207.142 / 78.004) * 275

= 730.27g Al acetate.

7 0

4 years ago