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qwelly [4]
3 years ago
8

Use inverse operations to each equation. Explain each step and identify the property used to reach step. 1) 19=h/3-8. 2)0.6x+ 0.

8= 1.4
Mathematics
1 answer:
Norma-Jean [14]3 years ago
3 0
Use ... 19=h/3-8 solve the equation : expiation each step and identify the property used to reach each step 0.6x+0.8=1.4 thanks ... use the inverse method to solve the system of linear equations -x +3y+2=1 2x+5y=3 3x+y-2z=-<span>2</span>
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2 sin2 (π/2 sin2x)=1+cos(π×cos2x)
givi [52]

Answer:

<h2>3/5</h2><h2>Step-by-step explanation:</h2>

the \: equation \: is \: equivalent \: to \\ 2  \:  { \sin }^{2} (( \: \frac{\pi}{2}) \:  {cos}^{2} x )    =   \\ \: 2 \:  {sin}^{2} (( \frac{\pi}{2} sin \: 2x \: ) \\  =  {cos}^{2} x = sin \: 2x \\  =  \:  \cos \: x(cos \: x \:  -  \: 2 \: sin \: x) \:  =  \: 0 \\  =  \: 1 - 2 \tan \: x = 0 \: as \: cos \: x \:  ≠ 0 \\ x ≠ (2n + 1) \frac{\pi}{2}  \\  =  \tan(x)  =  \frac{1}{2}  \\  =  \cos(2x)  =  \frac{1 -  {tan \: }^{2}x }{1 +  {tan \: }^{2} \:x }  =  \frac{3}{5}

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5 0
3 years ago
Anna‘s age is eight years less than four times her sisters age right in expression for Anna‘s age how old is Anna if her sister
mixer [17]

Anna's age will be equal to 6 years if her sister is five years old. The expression is Anna= 2T -4.

<h3>What is an expression?</h3>

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that Anna‘s age is eight years less than four times her sister's age right in expression for Anna‘s age how old is Anna if her sister is five years old

The expression for Anna's age is given below:-

Anna's age= 2T-4

Sister = 5 years

Anna= 2T -4

T is my sister's age. Then Anna's age will be calculated as:-

2(5)-4 = 10 - 4 = 6 years

Therefore, Anna's age will be equal to 6 years if her sister is five years old. The expression is Anna= 2T -4.

To know more about Expression follow

brainly.com/question/723406

#SPJ1

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2 years ago
Find the 30th term of the following sequence.
Nataly_w [17]

Answer:

-105

Step-by-step explanation:

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3 years ago
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nordsb [41]

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2. Compare CH3Cl and CCl4. Explain why one is polar and one is nonpolar. Be sure to use
Sever21 [200]

Answer:

Step-by-step explanation:

CH3Cl is polar while CCl4 is non polar.

When we consider whether something is polar or not we have to consider the following:

-Molecular symmetry

-Polar bonds (based on Electronegativity)

-Whether or not all the bonds are equal in magnitude

So for CCl4:

-All of the bonds are equal, in that all the electronegativity differences (delta EN) are the same.

-There are polar bonds as the delta EN between Cl (EN = 3.0) and C (EN=2.5) is 0.5 which means the bond is polar covalent

But when we look at the symmetry of the molecule (by drawing the lewis structure) there are no lone pairs, meaning that the molecule is symmetrical and therefore, it is non polar.

For CH3Cl:

-There are polar bonds here whether between C-H or C-Cl like above, both delta EN are greater than or equal to 0.5

-But, all of the bonds are not equal in strength. Cl (3.0) atoms have much higher electronegativity values than H (2.1) and there for they will "pull" the electrons closer and polarize the molecule. Therefore, the differences in bonds causes this molecule to be asymmetrical, and hence polar.

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3 years ago
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