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laila [671]
3 years ago
7

What is 9 - 4 ( -a + 9) + 3 (7 - 2a)

Mathematics
2 answers:
Natali5045456 [20]3 years ago
8 0
Hey there!

In order to solve this expression, we can use the distributive property. The distributive property states:

a(b+c) = ab+ac

Using this property along with addition and subtraction, we can simplify:

9-4(-a+9) + 3(7-2a) =

9 + 4a - 36 + 21 - 6a

Combine like terms:

(9-36+21) + (4a-6a) =

-6 - 2a 

Hope this helps
Elena L [17]3 years ago
3 0
-2a - 6

Hope I helped!

~ Zoe
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Sum of 2 numbers is 42, and their difference is 8. What are the numbers?​
Tems11 [23]

Answer:

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Step-by-step explanation:

Let the unknown two numbers be x & y.

According to the question,

Sum of 2 numbers is 42.

x + y = 42  ⇒ ( 1 )

Their difference is 8.

x - y = 8 ⇒ ( 2 )

First let us find the value of x.

( 1 ) + ( 2 )

x + y + x - y = 42 + 8

2x = 50

Divide both sides by 2.

x = 25

And now let us find the value of y.

x + y = 42

25 + y = 42

y = 42 - 25

y = 17

Therefore, the two numbers are 25 , 17

Hope this helps you :-)

Let me know if you have any other questions :-)

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2 years ago
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3 years ago
Help please i genuinely cant
Elza [17]

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Step-by-step explanation:

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2 years ago
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Use prime factorization to reduce the fraction 36/180
laila [671]

Answer:

Step-by-step explanation:

36 = 6* 6 = 2* 3 * 2* 3 = 2*2*3*3

180 = 2 * 2 * 3 * 3 * 5 = 2 * 2 * 3*3*5

\frac{36}{180}= \frac{2*2*3*3}{2*2*3*3*5} =  \frac{1}{5}

Factors that are common will be cancelled

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2 years ago
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The answer is A.) A smaller percentage of second-lunch students (18%) eat outside.

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