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3 years ago

If the original quantity is 14 and the new quantity is 22, which of these is the best estimate for the percent of change?

Mathematics

1 answer:

julsineya [31]3 years ago

8 0

D 22-14=8 14-7=7 7 of 14=50% so i think that’s the best estimate

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LiRa [457]

Answer:

Step-by-step explanation:

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3 years ago

If a + 2b + 6c = -9 <br> what is 12c + 2a + 4b

katrin [286]

Answer:

-18

Step-by-step explanation:

Multiply the given equation by 2.

2(a +2b +6c) = 2(-9)

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3 years ago

Find the square roots of 119 + 120i algebraically.

blondinia [14]

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

8 0

3 years ago

What is the answer for y=−16x^2 +119x +73

Zina [86]

Answer:

Im pretty sure the answer is y=375x+73

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3 years ago

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kondor19780726 [428]

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3 years ago