If y= -4x + 11 and 3x +y= 9, what is the value of y?

Mathematics

1 answer:

Radda [10]3 years ago

8 0

Use oppisites to answe. Work backwards

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What is the value of n?<br> <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2n-7%7D%7B3%7D%20%3D15" id="TexFormula1" title=" \fra

kirill [66]

$\frac{2n-7}{3}$ = 15

2n - 7 × 1 = 15 × 3

2n - 7 = 45

2n = 45 + 7

2n = 52

n = 26

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3 years ago

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kifflom [539]

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Step-by-step explanation:

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3 years ago

I have to factor this expression 2x+2

Lunna [17]

The factor of this expression would be 2(x+1)

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3 years ago

Read 2 more answers

ظhelp me please guys

german

Answer:the first one will be easy u need to move decimal up and u will get 0.0984375

the second one is 0.12

i hope this helps ! have great day :)

Step-by-step explanation:

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3 years ago

Find the zeros of polynomial function and solve polynomials equations.<br> f(x)=24x^3-64x^2-21x+56

8090 [49]

Since this polynomial has 4 terms, factoring by grouping should be the first thing we try here.

So, we have:

$8x^2(3x-8)-7(3x-8)=0 \implies\\ (8x^2-7)(3x-8)=0$

So, we can use ZPP to find out roots:

$3x-8 =0 \implies\\ x=\frac{8}{3}\\ 8x^2-7=0 \implies \\ 8x^2=7 \implies \\ x^2=\frac{7}{8} \implies \\ x=\pm\frac{\sqrt{7}}{\sqrt{{8}}}\\ \text{Rationalizing denominator:}\\ x=\pm\frac{\sqrt{56}}{8}$

So our three roots are:

$x \in \{\frac{8}{3},\frac{\sqrt{56}}{8},-\frac{\sqrt{56}}{8}\}$

8 0

3 years ago