3 years ago

Add and simplify (3x2+7)+(x2−6x+4)

Mathematics

1 answer:

juin [17]3 years ago

5 0

4 $x^{2}$ -6x+11

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Find the value of x. 52degrees. Xdegrees

Lady bird [3.3K]

Answer:

128°

Step-by-step explanation:

90+90+52= 232°

360°- 232° = said answer above

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3 years ago

Can someone please explain to me why -4² = -16?

oksano4ka [1.4K]

Answer:

-4 x -4 = -16

4 x 4 = 16

^2 or to the power of 2 basely means 4 times itself, because 2.

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2 years ago

Calculate an estimate of a square root of 119 + 120i

uysha [10]

Answer:

Step-by-step explanation:

Given

z=119+120 i

Let $\sqrt{119+120 i}=p+iq$

Squaring both sides

$119+120 i=p^2-q^2+2ipq$

Comparing real and imaginary part

Re(LHS)=Re(RHS)

$119=p^2-q^2$ -----------1

comparing Im(LHS)=Im(RHS)

120=2pq

$q=\frac{60}{p}$

Substitute q in 1

$119=p^2-(\frac{60}{p})^2$

$p^4-119p^2-(68)^2=0$

Let $x=p^2$

$x^2-119x-4624=0$

$x=frac{119\pm \sqrt{119^2+4\times 4624}}{2}$

$x=\frac{119\pm 180.71}{2}$

we take only Positive value because $p^2=x$

x=149.85

$p^2=149.85$

thus $p=\pm 12.24$

$q=\mp 4.90$

thus $\sqrt{119+120 i}=\pm (12.24+i 4.90)$

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4 years ago

For a test of : p 0.50, the sample proportion is 0.36 based on a sample size of 100. use this information to complete parts (a)

Margarita [4]

With equations $p=0.50, 0.36, 100, a(c) = c^2 = 5 \ \textgreater \ 4 \lim_{n \to \infty} (8n)$ we find our info to be conclusive and state our result as such.

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3 years ago

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kodGreya [7K]

Answer:

1- 8+9x

Step-by-step explanation:

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3 years ago

Read 2 more answers