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3 years ago

Nine more than four times a number is the same as one less than twice the number.find the number.

1 answer:

5 0

4x + 9 = 2x -1
Subtract 2x from both sides
Subtract 9 from both sides
2x = -10
Divide by 2 on both sides
x = -5
The answer is -5
I hope this helps you!

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Find a unit vector in the same direction as the given vector: v = −14.5i + 2.5 j.

Elis [28]

ANSWER

$- \frac{29}{866} \sqrt{866} i + \frac{5}{866} \sqrt{866} j$

EXPLANATION

The given vector is v = −14.5i + 2.5 j.

The magnitude of this vector is

$|v| = \sqrt{ {( - 14.5)}^{2} + {2.5}^{2} }$

$v| = \sqrt{ {( - 14.5)}^{2} + {2.5}^{2} }$

$v| = \sqrt{ 216.5} = \frac{ \sqrt{866} }{2}$

The unit vector in the direction of this vector is

$= \frac{v}{ |v| }$

$= - \frac{14.5}{ \frac{ \sqrt{866} }{2} } i + \frac{2.5}{ \frac{ \sqrt{866} }{2} } j$

$= - \frac{29}{866} \sqrt{866} i + \frac{5}{866} \sqrt{866} j$

7 0

2 years ago

Heather has a bag with 9 marbles, 9 tennis balls, 10 apples, and 2 books. What is the ratio of books to tennis balls?

sveticcg [70]

Answer:

Option A, (2/9) or 2:9

Step-by-step explanation:

Amount of books: 2 books

Amount of tennis balls: 9 tennis balls

Books : Tennis Balls

2 : 9

Answer: Option A, (2/9) or 2:9

3 0

2 years ago

Help me with please i will give a brainliest for a good answer

viva [34]

4(2) - 5 = 3
4(5) - 5 = 15
4(8) - 5 = 27
4(9) - 5 = 31

so the answers are 3, 15, 27, and 31

6 0

2 years ago

Read 2 more answers

What is 6 to the 4th power?

s2008m [1.1K]

The answer to 6 to the 4th power is 6•6•6•6=1,296

8 0

2 years ago

Helppp find the value of y lamooooo

garik1379 [7]

Answer:

4x-13 = 2x+9 ( i think it was exterior angle property i dont remember but its true)

so, solving that eq,

4x-2x = 9+13 (grouping variables and constants)

2x=22

x=11

also, 2x+9 and 3y+2 are on a transversal, and are supplementary angles (add up to 180°)

so, solving for x in 2x+9,

2(11)+9 = 22+9 = 31°

now, 31 + 3y+2 = 180

3y = 180 - 33

y = 147/3 = 49

(hoping you understood the calculations :)

6 0

2 years ago