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otez555 [7]
2 years ago
15

PLEASE ANSWER ASAP! MUST BE CORRECT! MORE POINTS GIVEN!!!

Mathematics
1 answer:
Tasya [4]2 years ago
4 0
These are the two rules for when a and b are positive numbers.
a + b = b + a
a - b ≠ b -a
a - b = -b + a

For example:

5.71 + 2.84 = 2.84 + 5.71
8.55 = 8.55

5.71 - 2.84 ≠ 2.84 - 5.71
2.87 ≠ -2.87

5.71 - 2.84 = -2.84 + 5.71
2.87 = 2.87



These are the rules for when a and b are negative numbers.
a + b = b + a
a - b = b + a

For example,

-6.2 + (-3.96) = -3.96 + (-6.2)
-6.2 - 3.96 = -3.96 - 6.2
-10.16 = -10.16

-6.2 - (3.96) = -3.96 + (-6.2)
-10.16 = -10.16



Also, if a is a positive number, while b is a negative number, we see these rules:
a + b = a - b
a - b = a + b

For example,

5.71 + (-6.2) = 5.71 - 6.2
-0.49 = -0.49

5.71 - (-6.2) = 5.71 + 6.2
11.91 = 11.91


Also, if a is a negative number while b is a positive number, then these rules will apply:
a + b = b - a
a - b = -b - a

For example,

-3.96 + 2.84 = 2.84 - 3.96
-1.12 = <span>-1.12
</span>
-3.96 - 2.84 = -2.84 - 3.96
-6.8 = -6.8


I hope this helps! :)
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Area = Length x width

Area = 12 x 8.6

Area = 103.2 square yards.

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Lara chose a square number. She rounds it to the nearest hundred. Her answer is 200. What are all the possible square number she
gogolik [260]
Your answer is going to be 20
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Find the seventh term of the
jekas [21]

Answer:

T_7 = \frac{64}{729}

Step-by-step explanation:

Given

a =1

r = \frac{2}{3}

Required

Determine the 7th term

The nth term of a gp is:

T_n = a * r^{n-1

So, we have:

T_7 = 1 * \frac{2}{3}^{7-1

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T_7 = 1 * \frac{2^6}{3^6}

T_7 = 1 * \frac{64}{729}

T_7 = \frac{64}{729}

6 0
3 years ago
What number when decreased by 10% is 180?​
Advocard [28]

Answer:

Number 200 decreased by 10% (10 percent) of its value (percentage decrease) and calculated absolute change (actual difference). Answer: percentage decreased number = 180, absolute change (actual difference) = -20

Step-by-step explanation:

4 0
2 years ago
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Which equation is an identity?
dalvyx [7]

The condition for an expression to be an <u>identity </u>is that both sides of equality must give the same value.



In this case, the equation that fulfills that condition is the first equation (1).



<u>Let’s prove it:</u>


1) 3w+8-w=4w-2(w-4)



Applying distributive property:



3w+8-w=4w-2w+8



Joining together similar terms on both sides of the equality:



2w+2w-4w=8-8



<h2>0=0    >>>>>>>This is true and fulfills the condition of identity</h2>

The other equations do not fulfill the condition:


2) 5y+5=5y-6


5y-5y=-6-5


0 =-11   >>>>>>>This is not logic



3) 6m-6=7m+9-m


6m-7m+m=9+6


0=15  >>>>>>>This is not logic



4) 8-(6v+7)=-6v-1


8-6v-7=-6v-1


1=-1   >>>>>>>This is not logic



3 0
3 years ago
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