3 years ago

Ten percent of number equals 40 what is the number

Mathematics

1 answer:

Masteriza [31]3 years ago

7 0

400Let x = the number 10% of x = 400.10 x = 400.10x/0.10 = 40/0.10x = 400 check:10% of 400 = 400.10 * 400 = 4040=40

You might be interested in

-4x+3x=2 how do I solve for x?

Snezhnost [94]

Answer: Combine like terms!

Step-by-step explanation:

-4x + 3x = 2

-1x = 2

-1x/-1 = 2/-1

x = -2

7 0

2 years ago

Find the vector projection of B onto A if A = 5i + 11j – 2k,B = 4i + 7k

valkas [14]

Answer:

$\frac{3}{13} i+\frac{11}{130} j-\frac{6}{65} k\\$

Step-by-step explanation:

Given A = 5i + 11j – 2k and B = 4i + 7k, the vector projection of B unto a is expressed as $proj_ab = \dfrac{b.a}{||a||^2} * a$

b.a = (5i + 11j – 2k)*( 4i + 0j + 7k)

note that i.i = j.j = k.k =1

b.a = 5(4)+11(0)-2(7)

b.a = 20-14

b.a = 6

||a|| = √5²+11²+(-2)²

||a|| = √25+121+4

||a|| = √130

square both sides

||a||² = (√130)

||a||² = 130

$proj_ab = \dfrac{6}{130} * (5i+11j-2k)\\\\proj_ab = \frac{30}{130} i+\frac{11}{130} j-\frac{12}{130} k\\\\proj_ab = \frac{3}{13} i+\frac{11}{130} j-\frac{6}{65} k\\\\$

<em>Hence the projection of b unto a is expressed as </em> $\frac{3}{13} i+\frac{11}{130} j-\frac{6}{65} k\\$ <em></em>

7 0

3 years ago

Condense and simplify, if possible: 2 In 3 + 3 ln x – 2 In y

elixir [45]

Answer:

Step-by-step explanation:

4 0

2 years ago

What would be your cost with each company if you traveled 100 miles? If you need to rent a truck for one day to move equipment.

yawa3891 [41]

It would be $39.95 for the Fast movers (bc they have unlimited mileage) and $38.70 for Speedy movers (including the extra miles added after 75) Please let me know if this helped, thanks.

4 0

2 years ago

Please help please please help

dalvyx [7]

The answer is 1 out of 10 (1/10)

4 0

2 years ago