What is the sum of 3/7 + 1/3

Mathematics

2 answers:

jeka57 [31]3 years ago

8 0

Answer:

16/21

Step-by-step explanation:

1) Find the least common denominator (LCD) of 3/7,1/3. In other words, find the Least Common Multiple (LCM) of 7,3.

LCD=21

2) Make the denominators the same as the LCD

$\frac{3*3}{7*3} +\frac{1*7}{3*7}$

3) Simplify. Denominators are now the same.

$\frac{9}{21} +\frac{7}{21} \\$

4) Join the denominators

$\frac{9+7}{21}$

5) Simplify

$\frac{16}{21}$

Anastasy [175]3 years ago

5 0

Answer:

${ \tt{ \frac{3}{7} + \frac{1}{3} }} \\ \\ = { \tt{ \frac{(3 \times 3) + (7 \times 1)}{21} }} \\ \\ = { \tt{ \frac{9 + 7}{21} }} \\ \\ = \: \dashrightarrow \: { \tt{ \frac{16}{21} }}$

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Taya2010 [7]

Answer:

$\large\boxed{x=-\dfrac{44,475}{64}}$

Step-by-step explanation:

$-4\sqrt[3]{x+25}=35\\\\\left(-4\sqrt[3]{x+25}\right)^3=35^3\\\\-4^3(x+25)=42,875\\\\-64(x+25)=42,875\qquad\text{use distributive property}\\\\-64x-1,600=42,875\qquad\text{add 1,600 to both sides}\\\\-64x=44,475\qquad\text{divide both sides by (-64)}\\\\x=-\dfrac{44,475}{64}$