3 years ago

X squared +20 equals 2X

Mathematics

1 answer:

Ivahew [28]3 years ago

5 0

x={1+i√19 , 1-i√19}

solve this by using quadratic formula

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Step-by-step explanation:

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2 years ago

4^3-(84÷14)^2 Please help! Show work too! thank you!! <3

ANEK [815]

Answer:

$28$

Step-by-step explanation:

$4^{3}-(84\div14)^{2}$

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3 years ago

Which of the following expresses the ratio of 3 inches to 2 yards?

Over [174]

$1\ yard=36\ inches\\
ratio:3\ inches:2\ yards\\
2\ yards=72\ inches\\
\\
ratio:
3:72[inches]\\
The\ correct\ answer\ is\ B.$

4 0

3 years ago

Read 2 more answers

Jan is x years old, her sister is twice as old as her, and her brother is three times older than her. Their ages add up to 29. H

victus00 [196]

Jan's age = $4\frac{5}{6}$ years

Sister's age = $9\frac{2}{3} \: years$

Step-by-step explanation:

Jan's age = x years

Sister's age = 2x years

Brother's age = 3x years

According to the given condition:

x + 2x + 3x = 29

6x = 29

x = 29/6

x = $4\frac{5}{6}$ years

2x = $2\times \frac{29}{6}= \frac{29}{3}=9\frac{2}{3} \: years$

Therefore,

Jan's age = $4\frac{5}{6}$ years

Sister's age = $9\frac{2}{3} \: years$

3 0

3 years ago