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3 years ago

Which of the following changes gives no evidence that a chemical reaction has taken place?

Mathematics

1 answer:

grigory [225]3 years ago

5 0

I think the correct answer for this is
a cube of solid forms a puddle of liquid
but i am no sure it's correct or no

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If s ( x ) = 2 - x² and t ( x ) = 3x, what is s ( t ( -7 ) )?

soldi70 [24.7K]

Answer:

- 439

Step-by-step explanation:

s ( x ) = 2 - x²
t ( x ) = 3x
s ( t ( -7 ) ) = ?

--------------------------

t (-7) = 3 * ( -7 ) = -21
s ( t ( -7 ) ) = s ( -21 ) = 2 - ( -21 )² = 2 - 441 = - 439
s ( t ( -7 ) ) = -439

5 0

2 years ago

Can someone help me with this question please and thank you.

Alexxandr [17]

Answer:

its porpotional

Step-by-step explanation:

hope this helps

4 0

3 years ago

A square has the perimter of 36 cm what is the area

bazaltina [42]

Answer:

81 cm^2

Step-by-step explanation:

Side = perimeter / 4 = 36/4 = 9 cm

area = side^2 = 9^2 = 81 cm^2

8 0

2 years ago

Read 2 more answers

A submersible vessel at an elevation of -75 feet to 5 times that elevation what is the vessel’s new elevation

liubo4ka [24]

Answer:

375 ft

Step-by-step explanation:

you just multiply it times 5

6 0

3 years ago

Read 2 more answers

Question 7

serg [7]

$\huge\underline{\red{A}\blue{n}\pink{s}\purple{w}\orange{e}\green{r} -}$

Given - a cone with volume 769?3 ft³ , having a height of 15 ft

To calculate - radius of the cone

We know that ,

$\bold{Volume \: of \: cone = \frac{1}{3}\pi \: r {}^{2} h }\\$

substituting the values in the formula stated above ,

$\bold{769.3 = \frac{1}{3} \times 3.14 \times r {}^{2} \times 15} \\ \\\bold{\implies r {}^{2} = \frac{769.3 \times 3}{3.14 \times 15} } \\ \\\bold{\implies r {}^{2} = \cancel\frac{2307.9}{47.1}} \\ \\\bold{ \implies \: r {}^{2} = 49} \\ \\ \bold{\implies \: r = 7 \: ft}$

therefore ,

radius = 7 cm

hope helpful ~

4 0

2 years ago