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3 years ago

What is 2(2+4x)+6(3x-4)

Mathematics

2 answers:

d1i1m1o1n [39]3 years ago

6 0

Answer:

26x-20

Step-by-step explanation:

brainliest plssss

dedylja [7]3 years ago

4 0

Answer:

-20+26x

x = 10/13= 0.769

Step-by-step explanation:

2(2+4x) + 6(3x-4)

4 + 8x + 18x - 24

4 - 24 + 18x + 8x

-20 + 26x =

or,

-20+26x = 0

26x = 20

x = 20/26

x = 10/13 = 0.769

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Select all the correct answers. Which vectors are unit vectors?

Ahat [919]

Answer:

Step-by-step explanation:

$(-\frac{1}{3} \sqrt{\frac{7}{2} } )^2+(\frac{1}{3} \sqrt{\frac{13}{2} } )^2\\=\frac{1}{9} (\frac{7}{2} +\frac{13}{2} )\\=\frac{1}{9} (\frac{7+13}{2} )\\=\frac{1}{9} \times10\\=\frac{10}{9} \neq 1$

not a unit vector.

$(\frac{1}{\sqrt{3} } )^2+(-\sqrt{\frac{2}{3} } )^2\\=\frac{1}{3} +\frac{2}{3} \\=\frac{1+2}{3} \\=\frac{3}{3} \\=1$

it is a unit vector.

$(\frac{1}{2} \sqrt{\frac{5}{3} } )^2+(-\frac{1}{2} \sqrt{\frac{7}{3} } )^2\\=\frac{1}{4} (\frac{5}{3} +\frac{7}{3} )\\=\frac{1}{4} (\frac{5+7}{3} )\\=\frac{1}{4} (\frac{12}{3} )\\=\frac{1}{4} (4)\\=1$

it is a unit vector.

$(\frac{3}{\sqrt{7} } )^2+(-\frac{2}{\sqrt{7} } )^2\\=\frac{9}{7} +\frac{4}{7} \\=\frac{9+4}{7} \\=\frac{13}{7} \neq 1$

it is not a unit vector.

6 0

3 years ago

Ayuda plissss no entiendo es para hoy no mañana

timurjin [86]

$\frac{2}{5}$ ÷ 4 = $\frac{2}{5}$ ÷ $\frac{4}{1}$ = $\frac{2}{20} =\frac{1}{10}$

$\frac{6}{7}$ ÷ 3 = $\frac{6}{7}$ ÷ $\frac{3}{1}$ = $\frac{6}{21}=\frac{2}{7}$

$\frac{1}{8}$ ÷ 9 = $\frac{1}{8}$ ÷ $\frac{9}{1}$ = $\frac{1}{72}$

$\frac{5}{6}$ ÷ 5 = $\frac{5}{6}$ ÷ $\frac{5}{1}$ = $\frac{5}{30} =\frac{1}{6}$

6 0

3 years ago

Read 2 more answers

Use synthetic division to solve (3x^4+6x^3+2x^2+9x+10)/ (x+2)

zhenek [66]

Hello!

I believe the answer is (3x^2 - 3x + 5) • (x + 1)

I hope it helps!

7 0

4 years ago

Read 2 more answers

7/19 en numero decimal

Nataly [62]

Answer: 0.368421053

Step-by-step explanation: 19/7=0.368412053 :-)

5 0

3 years ago

PLEASE HELP!!

Ratling [72]

All these cases represent experiments whose outcomes are all equaly likely. What we mean is that the cards have all the same probability of being dealt (1/52), and all the spaces of the spinner have the same probability of being landed into (1/5).

These probabilities are computed as 1 over all the possible outcomes.

(a) If you want a heart card and a five, you want the 5 of hearts. So, only one card would satisfy your request, and thus you have probability 1/52 of dealing the 5 of hearts.

$\dfrac{1}{52}\approx 0.019 = 1.9\%$

(b) There are four 10s and four Jacks in the deck, so 8 cards satisfy your request. With probability 8/52, you'll be dealt a Jack or a 10.

$\dfrac{8}{52}=\dfrac{2}{13}\approx 0.154 = 15.4\%$

(c) You have two "good" outcomes out of 5, so your probability is 2/5.

$\dfrac{2}{5}=0.4=40\%$

3 0

3 years ago