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3 years ago

8

By what rule can I identify numbers that can be divided by nine without rest? 765 is dividable by 9, and so is 123456789. How ca

n I "see" that?

1 answer:

sesenic [268]3 years ago

7 0

If you add the digits and it divides by 9 then it divides for that number

Like 765 is 7+6+5=18 since 18/9=2 then 765 divides by 9

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23 - x = 142 ggghhgfff

Dafna1 [17]

Answer:

x=-119

Step-by-step explanation:

23-x=142

-23 -23

-x=119

switch the signs

x=-119

5 0

3 years ago

3/10x - 1 = 3/4

Allisa [31]

First you make -1 and 3/4 have a common denominator. 1 has a fraction of 1/1 so times four it is 4/4. Then you add on both sides in order to isolate x and you get 3/10x = 7/4.

Then you isolate x by multyiplying the reciprocal of 3/10 on both sides, 10/3.
3/10 and 10/3 cancel out and you get an answer of x = 70/4.

You could then simplify it to get 35/6 by finding a greasted common multiple of 12 and 70 which is 2 and dividing both by 2 to get a simpilier answer.

So the answer is x = 35/6

4 0

2 years ago

Read 2 more answers

What is the area of a trapezoid with bases of 15.8 yd and 21.8 yd and a height of 11.7 yd?

DedPeter [7]

Add the bases together, divide that by 2 then multiply by the height.

15.8 + 21.8 = 37.6

37.6/2 = 18.8

18.8 x 11.7 = 219.96 yd^2

3 0

2 years ago

Read 2 more answers

How to solve this problem

Arisa [49]

First, you solve the square root:

$9+ \sqrt{-4}$

Knowing that the square root of a negative number doesn't exist:

$9+ \sqrt{-4}$
$9+2i$ is your answer.

Hope it helped,

Happy homework/ study/ exam!

4 0

3 years ago

BOTH ANSWERS PLEASEEEEEE

elixir [45]

Answer:

a) 3/4

b) 75%

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers