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g100num [7]
3 years ago
8

HELP

Mathematics
2 answers:
lara31 [8.8K]3 years ago
7 0

\dfrac{3}{4}a+\dfrac{1}{2}b-\dfrac{1}{2}a=\left(\dfrac{3}{4}a-\dfrac{1}{2}a\right)+\dfrac{1}{2}b\\\\\text{Find the common denominator:}\ it's\ 4\\\\\dfrac{1}{2}=\dfrac{1\cdot2}{2\cdot2}=\dfrac{2}{4}\\\\=\left(\dfrac{3}{4}a-\dfrac{2}{4}a\right)+\dfrac{1}{2}b=\boxed{\dfrac{1}{4}a+\dfrac{1}{2}b}\to\boxed{A)}

Fittoniya [83]3 years ago
5 0

Answer:

A) 1/4a + 1/2b

Step-by-step explanation:

3/4a +1/2b - 1/2a

3/4a -1/2 a     + 1/2 b

We need a common denominator for the a terms which is 4

3/4a - 1/2*2/2 a  + 1/2 b

3/4a -2/4a     + 1/2 b

1/4a + 1/2 b

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4x^2 /9xy^3 divided by 12x^5y^4 / 18x^5y2
Korolek [52]

Answer:

\frac{2x}{3y^5}

Step-by-step explanation:

See photo for steps.

8 0
3 years ago
I am a rectangle, and my area is 80 square inches. My width is 2 inches shorter than my length. What is my perimeter?
pshichka [43]
Area=l*b=l*(l-2)=80(given)

so, l^2 - 2l =80
   l^2 - 2l - 80=0
   l=10 or -8

l=10,b=10-2=8
perimeter=2(l+b)=2(18)=36
6 0
3 years ago
Read 2 more answers
A nike bag cost $122 if for the holiday it's marked down by 20%. What is the total cost after tax if the tax is 8%
Sindrei [870]
The answer would be 105.41
Explantaion: 122 • 0.2=24.4
122-24.4=97.6
97.6•0.08=7.808 which rounded to the nearest hundredths would be 7.81 then 97.6+7.81=105.41
4 0
3 years ago
I solved it myself and my result is (n+1)/n. Why is that 1/2 there? An explanation would be great if possible. Thanks!
katovenus [111]

Answer:

The product of (k + 1) series starts with 3 (because k = 2) and you need 2 to be multiplied to this in order to get (n + 1)!

Therefore you need to multiply 2 and 1/2 to make it right. 2 completes the factorial and 1/2 remains.

Hope it was clear explanation.

6 0
3 years ago
Which expression is a linear factor of x6 +x-66?
Naddik [55]

Answer:

Option D.

Step-by-step explanation:

The given expression is

x^6+x-66

It is a polynomial.

(x-c) is a linear factor of polynomial p(x) if p(c)=0.

Substitute x=-1 in the given expression.

(1)^6+(1)-66=-64\neq 0

It means (x+1) is not a linear factor of given expression.

Substitute x=-2 in the given expression.

(-2)^6+(-2)-66=-4\neq 0

It means (x+2) is not a linear factor of given expression.

Substitute x=-4 in the given expression.

(-4)^6+(-4)-66=4026\neq 0

It means (x+4) is not a linear factor of given expression.

None of the given options are a linear factor of given expression.

Therefore, the correct option is D.

7 0
3 years ago
Read 2 more answers
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