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goblinko [34]
3 years ago
12

Subtracting decimals 4 - 21

Mathematics
1 answer:
maw [93]3 years ago
4 0

Answer:

-17

Step-by-step explanation:

It is basically subtracting 4 from 21 except the answer is negative

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five years ago fathers age was 4 timess his son age now the sum of the age is 45 find the present age
tekilochka [14]
You could use a calculator
5 0
3 years ago
In circle E with m DEF 36 and DE = 3 units find area of
deff fn [24]

Answer:

A ≈ 2.83 units²

Step-by-step explanation:

The area (A) of the sector is calculated as

A = area of circle × fraction of circle

   = πr² × \frac{36}{360}

   = π × 3² × \frac{1}{10}

    = \frac{9\pi }{10}

   ≈ 2.83 units² ( to the nearest hundredth )

4 0
3 years ago
C. Assessment
Crazy boy [7]
1. B
2. A
3. A
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4 0
3 years ago
A bag contains 3 red marbles. The ratio of red marbles to blue marbles is 3 : 7. Find the number of blue marbles in the bag.
Phoenix [80]

Answer:

7 blue marbles

Step-by-step explanation:

because 3:7 equals red:blue so blue = 7

4 0
3 years ago
Read 2 more answers
Write an equation for a parabola with a focus of (1,-2) and a directrix of y=6
FinnZ [79.3K]

Answer:

y = - \frac{1}{16}(x - 1)² + 2

Step-by-step explanation:

Any point (x, y) on the parabola is equidistant from the focus and the directrix.

Using the distance formula

\sqrt{(x-1)^2+(y+2)^2^} = | y - 6 |

Square both sides

(x - 1)² + (y + 2)² = (y - 6)² ( expand the factors in y )

(x - 1)² + y² + 4y + 4 = y² - 12y + 36 ( subtract y² - 12y from both sides )

(x - 1)² + 16y + 4 = 36 ( subtract 4 from both sides )

(x - 1)² + 16y = 32 ← subtract (x - 1)² from both sides )

16y = - (x - 1)² + 32 ( divide all terms by 16 )

y = - \frac{1}{16} (x - 1)² + 2

8 0
3 years ago
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