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emmainna [20.7K]
3 years ago
9

please help me it is URGENT pls the first one is solve and the 2nd one is simplify I will give u lots of points thank you

Mathematics
2 answers:
klasskru [66]3 years ago
7 0
I.) (5x+3)/4-(2x-4)/3=5
Clear fractions:
3·((5x+3)/4)=15x+9
4·((2x-4)/3)=8x-16
15x+9-(8x-16)=5
15x+9-8x+16=5
Combine like terms:
7x+25=5
7x=-20
x=-20/7

II.) (3/11)·(5/6)-(9/12)·(4/3)+(5/13)·(6/15)
Remember PEMDAS
So first multiply:
3/11·5/6=15/66
9/12·4/3=3/3·1/1=3/3=1
5/13·6/15=1/13·6/3=6/39=2/13
(15/66)-1+(2/13)
Combine:
15/66-1/1=15/66-66/66=-51/66
-51/66+2/3=-51/66+44/66=-7/66
Answer: -7/66 :)
nata0808 [166]3 years ago
6 0
Answer 7/6 thank u and ur welcome
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Answer:

1.) mean

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3.) 0.0028

4) Yes

Step-by-step explanation:

Null hypothesis ; H0 : μ = 64

Alternative hypothesis ; H1 : μ < 64

From the data Given :

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Test statistic :

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Test statistic = - 2.77

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α = 10% = 0.1

Reject H0 ; if P < α

Here,

P < α ; Hence, we reject the null

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<u>Step-by-step explanation:</u>

To prove:

\cos 3x=\cos^3x-3\sin^2 x\cos x

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\sin 2A=2\sin A\cos A        ........(2)

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Taking the LHS:

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Using identity 1:

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Using identities 2 and 3:

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As, LHS = RHS

Hence proved

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3 years ago
The absolute value of a number is its distance from 0 on a number line. True or False ?
Aleonysh [2.5K]

true.

but the absolute value of 3 is 3 and -3 is 3. 6=6 -6=6

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Answer:

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