**Answer:**

63

**Step-by-step explanation:**

Because 30 percent of 90 equals 27

Thus

90 - 27 = 63.

Please mark brainliest and give 5 stars.

**Answer:**

6.becuase after the decimal or "." it goes 00.tenth, hundredth, thousandth, and so on

**Step-by-step explanation:**

PLEASE GIVE BRAINLIEST OR 5 ⭐

**Answer:**

balloons= 9

candles= 8

**Step-by-step explanation:**

let the number of balloons be x

and candles be y

So

15x+8y=192----------1

x+y=17--------------2

from 2, x= 17-y

put x= 17-y in 1

15( 17-y)+8y=192

255-15y+8y=192

solve for y

-7y=192-255

-7y=-63

x=63/7

x=9

put x= 9 in 1

9+y=17

y= 17-9

y=8.

X² + 3x = 10

Convert to standard form.

x² + 3x - 10 = 0

factor x² = x * x

factor -10 = 5 * -2

(x + 5) (x - 2) = 0

x(x -2) + 5(x-2) = 0

x² - 2x + 5x - 10 = 0

x² + 3x - 10 = 0

x + 5 = 0 x² + 3x = 10

x = -5 -5² + 3(-5) = 10

25 - 15 = 10

10 = 10

x - 2 = 0 x² + 3x = 10

x = 2 2² + 3(2) = 10

4 + 6 = 10

10 = 10

**Answer:**

0.56

**Step-by-step explanation:**