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3 years ago

What type of changes indicate a chemical change?

Mathematics

2 answers:

Kipish [7]3 years ago

8 0

Answer:

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions

Mkey [24]3 years ago

4 0

Answer:

Change in smell or change, gas bubbles, color change,

Step-by-step explanation:

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What is the slope of the line that passes through the pair of points (1/3, -1) and ( -2, 9/2)

UkoKoshka [18]

Answer:

$\boxed{m = - \frac{33}{14} }$

Step-by-step explanation:

Use the form below

$\boxed{\boxed{m = \frac{y_2 - y_1}{x_2 - x_1} }}$

Where

$m$ is a slope
$(x_1,~y_1)$ and $(x_2,~y_2)$ are the point of the line

So, the slope is

$(\frac{1}{3} ,~ -1) \to x_1 = \frac{1}{3} ~and~y_1 = -1$

$(-2,~ \frac{9}{2} ) \to x_2 = -2~and~y_2 = \frac{9}{2}$

$m = \frac{\frac{9}{2} -(-1)}{-2-\frac{1}{3} }$

$m = \frac{\frac{11}{2} }{\frac{-7}{3} }$

$m = \frac{11}{2} \div (-\frac{7}{3} )$

$m = \frac{11}{2} \times (-\frac{3}{7} )$

$m = - \frac{33}{14}$

Happy to help:)

7 0

3 years ago

Read 2 more answers

A pastry recipe calls for 3 cups of flour to make 8 servings. How many cups of flour are needed to make 6 servings?

natima [27]

The answer is A. If you divide 3/8 which equals .375. Then you multiply .375 by 6 to get 2.25!

:D Hope this helps!

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3 years ago

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Suppose you just received a shipment of fifteen televisions. Four of the televisions are defective. If two televisions are rando

emmasim [6.3K]

Answer:

27% chance a tv is defective. 13% chance one at least one doesn't work.

Step-by-step explanation:

100/15

4X6.67=26.67

*NOT 100% JUST TRYING TO HELP*

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3 years ago

In January, you deposit $150 into your checking account. Every month after that, you deposit 10% more than you did the month bef

Reptile [31]

This is a geometric sequence of the form:

a(n)=ar^(n-1) in this case a=150, r=1.1

a(n)=150(1.1)^(n-1) August is the eighth month so

a(8)=150(1.1)^7

a(8)=292.307565

So you deposited $292.31 (to the nearest cent) in August.

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2 years ago

Use synthetic division and the Remainder Theorem to find f(4) if f(x) = – 2x3 + 9x2

Elis [28]

Step-by-step explanation:

Let's see. f(4) makes the divisor x-4

4|-2 9 -6 7

| 8 -68 296

-2 17 -74 2072

The quotient is -2x²+17x-74 with a remainder of 2072

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2 years ago