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almond37 [142]
2 years ago
10

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

Mathematics
2 answers:
jeka57 [31]2 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]2 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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3 years ago
Write the polynomial in standard form. Then name the polynomial on its degree and numbers of terms. 8-4x^2+10x^2+2x
mojhsa [17]
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3 years ago
1.5 x 32
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2 years ago
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Oksana_A [137]

Step-by-step explanation:

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8 0
3 years ago
A merchant has coffee worth $20 a pound that she wishes to mix with 70 pounds of coffee worth $90 a pound to get a mixture that
Dvinal [7]

Let us start with assuming the amount of coffee worth $20 a pound to be "x" pounds.

Now she wants to mix "x" pounds of $20 coffee with 70 pounds of $90 coffee.

So the mixture would be (x + 70) pounds.

And the value of mixture would be = 20·x + (90)·(70) = (20x + 6300) dollars.

She want to sell this mixture at rate of $30 a pound. Her earning would be = 30·(x + 70) = (30x + 2100) dollars.

We know that the value of mixture would be equal to her earnings.

30x + 2100 = 20x + 6300

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x = 420

So, 420 pounds of $20 coffee would be used.

7 0
3 years ago
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