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4 years ago

How do you subtract a positive fraction from a negative fraction?

Mathematics

1 answer:

Usimov [2.4K]4 years ago

8 0

You need the same denominator

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⦁ Kim's age is twice that of her sister. When you add Kim's age to her sister's age, you get 24. How old is each sister?

Vitek1552 [10]

Answer:

Kim is 16 years old and her sister is 8 years old.

Step-by-step explanation:

We can use equations to represent this scenario.

Let Kim's age be 'k' and her sister's age be 's'.

Thus, k=2s (since Kim's age is double of her sister)

and k+s=24 (their ages add to 24 (from question)

Substituting the first equation:

2s+s=24

3s=24

s=8

Therefore, Kim's sister is 8 years old.

Now substitute this value into the second equation:

k+8=24

k=16

Therefore, Kim is 16 years old.

6 0

3 years ago

Find the distance between A(2,4) B(3,6)

Irina-Kira [14]

Answer:

$d = \sqrt{5}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra II

Distance Formula: $d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Step-by-step explanation:

Step 1: Define

Point A (2, 4)

Point B (3, 6)

Step 2: Find distance d

Substitute: $d = \sqrt{(3-2)^2+(6-4)^2}$
Subtract: $d = \sqrt{(1)^2+(2)^2}$
Exponents: $d = \sqrt{1+4}$
Add: $d = \sqrt{5}$

5 0

3 years ago

-4(x-4)=-44 Please answer this with how you got the answer.

devlian [24]

Answer: x = -15

Step-by-step explanation:

Think PEMDAS

First, we factor the parenthesis:

-4 (x-4) = -4(x) + -4(-4)

now we are left with -4x + 16 = -44

Next is to isolate the "x":

to do this, we must subtract 16 from -44

-44 - 16 = 60

now we have -4x = 60

Now we divide both sides by -4 in order to isolate "x"

dividing -4x/-4 = x

diving 60/-4 = -15

the answer is x= -15

5 0

3 years ago

-3(1-3x)+2x its due today help! I got 11x - 3 I don't know if it's correct

-BARSIC- [3]

Answer:

I got -3+11x

Step-by-step explanation:

-3(1-3x)+2x

-3+9x+2x

-3+11x

6 0

3 years ago

Read 2 more answers

10 - 2 (3x + 4) < 11

Effectus [21]

Answer:

x > - $\frac{3}{2}$

Step-by-step explanation:

Given

10 - 2(3x + 4) < 11 ← distribute and simplify left side

10 - 6x - 8 < 11

2 - 6x < 11 ( subtract 2 from both sides )

- 6x < 9

Divide both sides by - 6, reversing the symbol as a result of dividing by a negative quantity.

x > $\frac{9}{-6}$ ⇒ x > - $\frac{3}{2}$

6 0

3 years ago

Read 2 more answers