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3 years ago

4x + 2 = 2x - 20 what is x

Mathematics

2 answers:

lisabon 2012 [21]3 years ago

8 0

Step-by-step explanation:

4x + 2 = 2x - 20

4x-2x=-20-2

2x=-22

x=-11

Cloud [144]3 years ago

7 0

Answer:

$4 \times + 2 = 2 \times - 20$

$2 \times + 1 = \times - 10$

$2 \times - \times = - 10 - 1$

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Alvin is 13 years older than Elga the sum of their age is 55 what is elgas age

Makovka662 [10]

Answer:

Elga is 42 years old

Step-by-step explanation:

55-13=42

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3 years ago

I need help with this math

Zinaida [17]

Answer:

Step-by-step explanation:

∠1 + ∠2 = 180 {Supplementary angles}

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2 years ago

Read 2 more answers

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Charra [1.4K]

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2 years ago

Five decreased by twice a number is same as five less than<br> three times the number.

sergejj [24]

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2 years ago

In the expansion (ax+by)^7, the coefficients of the first two terms are 128 and -224, respectively. Find the values of a and b

madam [21]

Answer:

a = 2, b = 3.5

Step-by-step explanation:

Expanding $(ax+by)^7$ using Binomial expansion, we have that:

$(ax+by)^7$ =

$(ax)^7(by)^0 + (ax)^6(by)^1 + (ax)^5(by)^2 + (ax)^4(by)^3 + (ax)^3(by)^4 + (ax)^2(by)^5 + (ax)^1(by)^6 + (ax)^0(by)^7$

$= (a)^7(x)^7+ (a)^6(x)^6(b)(y) + (a)^5(x)^5(b)^2(y)^2 + (a)^4(x)^4(b)^3(y)^3 + (a)^3(x)^3(b)^4(y)^4 + (a)^2(x)^2(b)^5(y)^5 + (a)(x)(b)^6(y)^6 + (b)^7(y)^7\\\\\\= (a)^7(x)^7+ (a)^6(b)(x)^6(y) + (a)^5(b)^2(x)^5(y)^2 + (a)^4(b)^3(x)^4(y)^3 + (a)^3(b)^4(x)^3(y)^4 + (a)^2(b)^5(x)^2(y)^5 + (a)(b)^6(x)(y)^6 + (b)^7(y)^7$